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WNV Update

West Nile Virus Positive Squirrel Found in Alameda County

-- First Squirrel Positive in 2007 for West Nile Virus Found in San Leandro --

The squirrel was collected on September 19 from the San Leandro/Oakland border and tested positive for WNV on September 26.  In 2006 two WNV positive squirrels were found in Livermore and Pleasanton in August and September.

Crows and squirrels are especially suseptible to WNV. They cannot directly transmit the virus to humans. Because squirrels do not fly, a WNV positive squirrel would indicate a more localized presense of the virus. In contrast, crows typically roost in areas different from where they forage. Mosquitoes usually feed on crows during the roosting period, yet the crow would likely sicken and die in the foraging area.

Three traps were set in the area where the squirrel was found, a total of seven culex pipiens were collected and sent to the Department of Public Health for WNV testing. No virus was detected.

To date this year, countywide, we have had 16 birds, 2 mosquito pools, and 1 squirrel test positve for WNV.

Use the following list to protect yourself from mosquito bites:

•  DRAIN: all sources of standing water that can support mosquito breeding, and don't overwater your lawn.

•  DAWN and DUSK : Avoid spending time outside when mosquitoes are most active, especially at dawn and the first two hours after sunset.

•  DEET : Apply insect repellent containing DEET or Picaridin according to label instructions.

•  DRESS APPROPRIATELY: When outdoors, wear long pants and long-sleeved shirts.

•  DOOR and window screens: Repair or replace screens that have tears or holes.

Contact us if you are being bothered by mosquitoes or know of a potential mosquito breeding source.

WNV Update

-- First mosquitoes Positive in 2007 for West Nile Virus found in Livermore --

We have received a report of the first positive mosquito pool in Alameda County from the Department of Public Health. The mosquito pool (a group of 13 Culex pipiens collected and analyzed together) came from a combination of 4 traps placed around Lawrence Livermore Lab. Our focus on the Lab area was due to the recent WNV positive birds collected near there: 6 crows and 1 blackbird. This year a total of 12 birds have tested positive from the entire Tri-Valley area. This is down considerably from lasts year's total of 27 positive birds reported through September from the Tri-Valley area.

Use the following list to protect yourself from mosquito bites:

•  DRAIN: all sources of standing water that can support mosquito breeding, and don't overwater your lawn.

•  DAWN and DUSK : Avoid spending time outside when mosquitoes are most active, especially at dawn and the first two hours after sunset.

•  DEET : Apply insect repellent containing DEET or Picaridin according to label instructions.

•  DRESS APPROPRIATELY: When outdoors, wear long pants and long-sleeved shirts.

•  DOOR and window screens: Repair or replace screens that have tears or holes.

Contact us if you are being bothered by mosquitoes or know of a potential mosquito breeding source.

Contra Costa Mosquito & Vector Control District

News Release

For Immediate Release - August 2, 2007

MOSQUITOES TEST POSITIVE FOR WEST NILE VIRUS IN CONTRA COSTA COUNTY

--RISK TO PEOPLE INCREASES–
-District reports first evidence of mosquitoes infected with West Nile virus for 2007-

CONCORD, CALIFORNIA - - Four samples of mosquitoes have tested positive for West Nile virus in Contra Costa County. One sample of mosquitoes was from Antioch and three samples were from Oakley.

"The significance of finding positive West Nile virus mosquitoes is that people can contract the disease when they are bitten by an infected mosquito," said Deborah Bass, spokesperson for the District. "While we will increase our control efforts in these areas, we continue to ask the public to ensure that they are not producing mosquitoes in their yards, which are often the biggest source of mosquitoes. And of course, to wear mosquito repellent when outdoors."

The vast majority of the District’s resources are focused on eliminating mosquitoes in their larval form; however, as a result of the heightened risk to people due to finding infected adult mosquitoes, District officials are preparing for possible adult mosquito fogging or spraying in focused neighborhoods during the latter part of this week, weather permitting.

The District recently introduced an automatic email notification for people wishing to learn about adult mosquito fogging or spraying in the county. Anyone can visit the District’s website at www.ccmvcd.dst.ca.us and opt to receive the notifications automatically. Earlier this year, the Contra Costa County sheriff’s department announced that they discontinued their telephone notification calls for District adult mosquito spray operations since their reevaluation indicated that it did not meet their emergency criteria.

The District offers several ways in which people can learn about adult mosquito spray operations. Residents can visit the District website and view the information, opt in for the email notifications, or simply phone the District for a recorded message at (925) 685-9301.

Last year in Contra Costa County, eight people were documented with West Nile virus and two people died. To date in 2007, there have been twelve birds that have tested positive for West Nile virus.

In California this year, five people have died of the virus and a total of 64 people infected.

Residents are urged to take the following precautions:

DEFEND yourself against mosquitoes by using a repellent with an effective active ingredient such as DEET, Picaridin or Oil of Lemon Eucalyptus. Make sure to follow label directions.

DRAIN all sources of standing water that may support mosquito-breeding habitats. Residential sources can be big producers of mosquitoes in Contra Costa County.

To learn if the District is spraying for adult mosquitoes in Contra Costa County, please visit the district’s website at www.ccmvcd.dst.ca.us or call the District at (925) 685-9301 for a recorded message. Adult mosquito spray notifications by email are also available by signing up on the website.

Contra Costa Mosquito & Vector Control District is located at 155 Mason Circle in Concord. Call the District to report mosquito problems at (925) 685-9301, or visit their office between 8:00 a.m. and 4:30 p.m. to get FREE mosquitofish for ornamental ponds or horse troughs.

For information concerning West Nile virus symptoms, prevention, or testing, please call the Contra Costa Health Services department at (888) 959-9911 or visit their website at www.ccpublichealth.org

For information concerning West Nile virus and horses, please visit the California Department of Food and Agriculture Animal Health Branch at www.cdfa.ca.gov/ahfss/ah/wnv_info.htm or call them at (916) 654-1447.

To report dead birds or squirrels or learn about West Nile virus cases and activity in California, visit the California Department of Public Health’s website at www.westnile.ca.govhttp://www.westnile.ca.gov/


Deborah Bass
Public Affairs Manager

Contra Costa Mosquito & Vector Control District
155 Mason Circle
Concord, CA 94520
(925) 685-9301, ext. 112
(925) 260-4670 Cell
(925) 685-0266 Fax
dbass@ccmvcd.net
www.ccmvcd.dst.ca.us

News Release

Gov. Schwarzenegger Declares State of Emergency in Counties Hit Hardest by West Nile Virus

With the number of people infected this year with West Nile Virus three times higher than the same time last year, Governor Arnold Schwarzenegger today declared a state of emergency in Kern, Colusa and San Joaquin counties to prevent the spread of this mosquito-borne disease.  This year there have been 4 deaths in California due to West Nile Virus (2 in Kern County , 1 in San Joaquin County and 1 in Colusa County ).

"Today I'm taking action to help the counties hit hardest by West Nile Virus.  My proclamation makes financial assistance available to the local vector control districts and directs state agencies to take proactive measures to protect Californians from further spread of this deadly virus.  I will continue to ensure our local agencies have whatever resources they need to fight the spread of this disease," said Governor Schwarzenegger.  

Since taking office, Governor Schwarzenegger has invested more than $15 million to fight the West Nile Virus.    California has one of the most comprehensive West Nile Virus surveillance and control systems in the U.S. The state deploys surveillance and detection technology to track specific areas of West Nile Virus activity and alert local agencies so they can target their mosquito control activities.

For more information about West Nile Virus, visit http://westnile.ca.gov .

Full text of the Governor's emergency proclamation:

A PROCLAMATION

OF A STATE OF EMERGENCY

            WHEREAS when compared to the same time last year, there has been a three-fold increase in the number of people infected by West Nile Virus; and

            WHEREAS since 2002, West Nile Virus has infected hundreds of people and caused multiple deaths in California , including four deaths this year; and

            WHEREAS the recent upturn in foreclosures this year has increased the number of vacant homes this summer with unattended and untreated pools, which has exacerbated the spread of West Nile Virus; and

            WHEREAS local governments have made sustained efforts to minimize the spread of the virus, and the state has supplemented these efforts by dedicating over $15 million over the last three years to mitigate the virus's effects; and

            WHEREAS despite those efforts to eradicate West Nile Virus, the virus remains a threat, and further efforts to control the spread of the virus and to reduce and minimize the risk of infection are needed; and

            WHEREAS the Mosquito Vector Control Association of California, which is composed of 61 local vector control districts, is seeking state assistance in addressing the potential for a West Nile Virus epidemic in California; including a request for funding for surveillance activity and abatement efforts; and

            WHEREAS control of West Nile Virus may require immediate actions to limit the population of adult mosquitoes and mosquito larvae, and those actions may include the ground and aerial application of pesticides in urban, suburban and rural areas; and

            WHEREAS there are also numerous and significant incidents of Valley Fever, especially in Kern County ; and

            WHEREAS due to the magnitude of the threat, the size of the affected areas and the need to control the spread of the virus across jurisdictional boundaries, the conditions are beyond the control of the services, personnel, equipment and facilities of any single county, city and county, or city, and require the combined forces of a mutual aid region or regions; and

            WHEREAS under section 8558(b) of the California Government Code, I find that conditions of extreme peril to the safety of persons and property exist within the Counties of Kern, Colusa and San Joaquin caused by the threat of West Nile Virus.

            NOW, THEREFORE, I, ARNOLD SCHWARZENEGGER, Governor of the State of California, in accordance with the authority vested in me by the California Constitution and the California Emergency Services Act and, in particular, sections 8625, 8567 and 8571 of the California Government Code, HEREBY PROCLAIM A STATE OF EMERGENCY to exist within Kern, Colusa and San Joaquin Counties, and hereby issue the following orders:

            IT IS ORDERED that the Department of Public Health shall allocate up to $1 million dollars as needed, to local vector control agencies to identify potential mosquito habitat and to treat those areas to prevent the spread of West Nile Virus in the three above-listed counties and other counties identified by the Department of Public Health.

            IT IS FURTHER ORDERED that the Department of Public Health shall allocate up to $350,000 to local vector control agencies for surveillance purposes to provide an early warning of the incidence of West Nile Virus so that proper control measures can be taken by the local vector control agencies to prevent the spread of West Nile Virus in the three above-listed counties and other counties identified by the Department of Public Health. 

            IT IS FURTHER ORDERED that the Department of Public Health shall coordinate with the State and Consumer Services Agency, the Resources Agency and the Department of Food and Agriculture to develop a plan using best management practices for implementation by the appropriate state agencies for the early detection of West Nile Virus on state-owned properties and appropriate mitigation and abatement measures.  Funds in the amount up to $150,000 shall be allocated for the purpose of developing this plan.

            IT IS FURTHER ORDERED that the Department of Public Health and the Department of Food and Agriculture shall work with the Mosquito Research Program at the University of California , Davis , to determine what resources are needed to further advance the research on the ecology and the epidemiology of West Nile Virus.

            IT IS FURTHER ORDERED that the Department of Public Health shall work with (1) local vector control districts to utilize their existing power pursuant to Health and Safety code section 2053 to inspect and abate vector or public nuisances, with special emphasis on the removal of standing water in untended pools and containers on vacant property; and (2) the Business, Transportation and Housing Agency and local public health departments to notify lenders, realtors, mortgage brokers and others whose responsibilities include managing vacant homes to ensure that pools and other containers that can hold water are drained and maintained empty to prevent the spread of West Nile Virus.

            IT IS FURTHER ORDERED that the Department of Public Heath shall implement a supplemental program of mosquito control, including health advisories and technical assistance, in the above-listed counties to assist those counties and the mosquito and vector control agencies within those regions to minimize the proliferation of mosquitoes and to reduce the transmission of West Nile Virus. 

            IT IS FURTHER ORDERED that all agencies and departments of state government utilize and employ state personnel, equipment and facilities for the performance of any and all activities consistent with the direction of the Department of Public Health in an effort to address and mitigate this emergency, and consistent with the State Emergency Plan as coordinated by the Office of Emergency Services.

            IT IS FURTHER ORDERED that the Department of Public Health enter into such contracts as it deems appropriate, in consultation with the above-listed counties and the mosquito and vector control agencies within those regions, to provide services, material, personnel and equipment to supplement the West Nile Virus mitigation efforts in those jurisdictions.

            IT IS FURTHER ORDERED that the provisions of the Government Code, the Public Contract Code, the State Contracting Manual and Management Memo 03-10, along with all Department of Pubic Health policies, applicable to state contracts, including, but not limited to, advertising and competitive bidding requirements and approvals for non-competitively bid contracts, are hereby temporarily suspended with respect to contracts to provide services, material, personnel and equipment to supplement the West Nile Virus mitigation and abatement efforts in the above-listed counties to the extent that such laws would prevent, hinder or delay prompt mitigation of the effects of this emergency.

            IT IS FURTHER ORDERED that the Department of Public Health shall consult with the county agricultural commissioner prior to the application of "prohibited materials," as defined in subdivision (p) of section 110815 of the Health and Safety Code, to agricultural land used for the production of certified organic foods.

            IT IS FURTHER ORDERED that the Department of Public Health work with local public health departments to take appropriate actions to minimize the incidents of Valley Fever in the above-listed counties.

            I FURTHER DIRECT that as soon as hereafter possible, this proclamation be filed in the Office of the Secretary of State and that widespread publicity and notice be given to this proclamation. 

IN WITNESS WHEREOF I have hereunto set my hand and caused the Great Seal of the State of California to be affixed this 2 nd day of August 2007.

______________________________

ARNOLD SCHWARZENEGGER

Governor of California

ATTEST:

_______________________________

DEBRA BOWEN

Secretary of State

San Joaquin County West Nile Virus Task Force

News Release

For Immediate Release July 31, 2007

FIRST HUMAN WNV FATALITY DETECTED IN SAN JOAQUIN COUNTY THIS YEAR

(STOCKTON, CA) — San Joaquin County Public Health Services announced today that an 86-year-old male living in the central area of San Joaquin County has died from complications due to West Nile Virus (WNV). This is the first reported WNV death of a San Joaquin County resident in 2007. With the warm weather, there has been a
rapid increase in mosquitoes in the county and increased spread of WNV.

WNV is transmitted to humans and animals through the bite of a mosquito. “With the recent increase in the mosquito population, West Nile Virus is a concern in the County and around the state. It is very important that people take precautions to avoid mosquito bites,” said Dr. Karen Furst, Health Officer of San Joaquin County.

About one in five people infected with WNV will develop West Nile Fever with symptoms of headache, fever and fatigue. In some people, the fatigue may last several weeks to months. About one in 150 people infected with WNV will develop West Nile Neuroinvasive Disease. This is a severe condition with symptoms such as neck stiffness, confusion, coma, tremors, convulsions, muscle weakness, numbness, and/or paralysis. Symptoms may last several weeks and neurological effects may be permanent. The risk of severe disease is highest in people over 50 years old and those with other health problems effecting their immune systems. People with diabetes are also at increased risk of severe disease from WNV. The average age of people reported with WNV in San Joaquin County is 42 years old.

During 2006, there were 8 human cases, 12 horse cases, 46 groups of mosquitoes, and 19 sentinel chickens that tested positive for WNV in San Joaquin County.

Individuals can reduce their risk of mosquito-borne diseases by taking these precautions:
- Apply insect repellent containing the active ingredient DEET or Picaridin when outdoors, according to label instructions.
- Avoid spending time outside when mosquitoes are most active, at dawn and dusk, and especially for the first two hours after sunset.
- When outdoors, wear long pants, long-sleeved shirts and other protective clothing.
- Exclude mosquitoes from your home with tight fitting screens on doors and windows.
- Eliminate all sources of standing water on your property that can support mosquito breeding.

Aaron Devencenzi, Information Officer
SJC Mosquito & Vector Control District
(209) 982-4675

Karen McConnell,
Public Information Officer
San Joaquin County
(209) 468-3417

San Joaquin County West Nile Virus Task Force
Contact your veterinarian for information on vaccinating equine against WNV.

More Information on West Nile Virus:
Residents and visitors of San Joaquin County can obtain additional information on West Nile Virus including local mosquito control activities by calling the information line 209-469-8200 or on the web at www.sjgov.org/oes. Spray locations and times will normally be available 36 to 48 hours in advance.
Report mosquito problems to the SJC Mosquito & Vector Control District at 1-800-300-4675 or 209-982-4675.
Report all dead birds and tree squirrels to 1-877-968-2473 or www.westnile.ca.gov.

Contra Costa Mosquito & Vector Control District

News Release

For Immediate Release - July 18, 2007

                     HOME FORECLOSURES WORSEN RISK FOR WEST NILE VIRUS

-Nearly half of the nearly 10,000 homes in foreclosure in Contra Costa County are located in areas of the highest risk for West Nile virus activity--

CONCORD, CALIFORNIA - - Home foreclosures are proving to be a health risk in Contra Costa County. The Contra Costa Mosquito & Vector Control District is asking homeowners, neighbors, Realtors, landscapers and other home service personnel to be vigilant in their fight against mosquito breeding and West Nile virus.

Homes in foreclosure have an increased risk of breeding mosquitoes that can carry the virus because homeowners are busy dealing with their financial situation and not necessarily maintaining their swimming pool or eliminating standing water on their property that can breed mosquitoes. Often, homes are ultimately abandoned and the swimming pool or spa is left to the mosquitoes where hundreds of thousands of them can be produced.

"Nearly 10,000 homes in Contra Costa County are in some sort of the foreclosure process and have the potential to produce mosquitoes simply through neglect or abandonment," said Deborah Bass, spokeswoman for the District. "To make matters worse, many of those homes are located in areas that are at higher risk for people contracting West Nile virus."

Overall, district technicians have inspected twice as many pools this year than last year. One out of three swimming pools was breeding mosquitoes.

"Clearly the West Nile virus risk would be decreased drastically if every resident and business owner became a steward of their neighborhood and their community," Bass said. "With more than 420,000 households and businesses in the county, the District simply doesn’t have the workforce to go door to door and inspect every property."

Homeowners are urged to drain their pools properly and not into the street. For proper pool-draining instructions, visit http://www.cccleanwater.org/_pdfs/Pool_Spa_Brochure.pdf. Bleach or other additives should not be used. Mosquitofish are available at the District free of charge.

Recent events, such as the 41 positive mosquito samples found in San Joaquin County that borders Contra Costa County, the clusters of dead bird reports in the county, and the increase of mosquitoes breeding in swimming pools and backyard sources have District officials worried that the risk of West Nile virus may be greater this year.

Last year in Contra Costa County, eight people were documented with West Nile virus and two people died. To date in 2007 there have been seven birds that have tested positive for West Nile virus.

In California this year, one person has died of the virus and nine more infected.

Most people who are bitten by a mosquito with WNV will not get sick; however, up to 20 percent of the population infected with WNV will get West Nile fever. West Nile fever causes people to experience mild to severe flu-like symptoms such as fever, headache, body ache and possible paralysis. Less than one percent of infected individuals will require hospitalization. The elderly and those with compromised immune systems are most susceptible to illness and death caused by WNV.

Residents are urged to take the following precautions:

DEFEND yourself against mosquitoes by using a repellent with an effective active ingredient such as DEET, Picaridin or Oil of Lemon Eucalyptus. Make sure to follow label directions.

DRAIN all sources of standing water that may support mosquito-breeding habitats. Residential sources can be big producers of mosquitoes in Contra Costa County.

To learn if the District is spraying for adult mosquitoes in Contra Costa County, please visit the district’s website at www.ccmvcd.dst.ca.us or call the District at (925) 685-9301 for a recorded message. Adult mosquito spray notifications by email are also available by signing up on the website.

Contra Costa Mosquito & Vector Control District is located at 155 Mason Circle in Concord. Call the District to report mosquito problems at (925) 685-9301, or visit their office between 8:00 a.m. and 4:30 p.m. to get FREE mosquitofish for ornamental ponds or horse troughs.

For information concerning West Nile virus symptoms, prevention, or testing, please call the Contra Costa Health Services department at (888) 959-9911 or visit their website at www.ccpublichealth.org

For information concerning West Nile virus and horses, please visit the California Department of Food and Agriculture Animal Health Branch at www.cdfa.ca.gov/ahfss/ah/wnv_info.htm or call them at (916) 654-1447.

Deborah Bass
Public Affairs Manager

Contra Costa Mosquito & Vector Control District
155 Mason Circle
Concord, CA 94520
(925) 685-9301, ext. 112
(925) 260-4670 Cell
(925) 685-0266 Fax
dbass@ccmvcd.net
www.ccmvcd.dst.ca.us

San Joaquin County West Nile Virus Task Force

News Release

For Immediate Release-WNVTF07-04                                                                                                          July 6, 2007

Hot Weather Brings Rapid Increase In West Nile Virus Activity

Mosquito Control Aggressively Responds To Mosquito Populations

(STOCKTON, CA) – The rapid increase in temperature has resulted in a rapid increase in mosquitoes and the spread of West Nile Virus. This week, San Joaquin County Mosquito & Vector Control District (District) has identified West Nile Virus in 41 groups of collected mosquitoes and 5 dead birds. “This amount of West Nile Virus activity is of concern. With that said, the District is responding aggressively to reduce mosquito populations and the threat they pose,” said John Stroh, Manager of the District.

The District’s comprehensive mosquito-borne disease surveillance system has detected West Nile Virus activity in the following zip codes: 95206, 95209, 95210, 95219, 95242, 95304, 95336, and 95337. Areas of San Joaquin County with high mosquito populations and/or the presence of West Nile Virus will be targeted for adult mosquito spraying. This spraying will be performed in conjunction with the District’s ongoing mosquito control activities of public outreach and education, mosquito source inspection and treatment, mosquitofish distribution in water sources, and legal abatement.

Adult mosquito control is performed using both truck mounted and airplane sprayers as weather conditions permit. Spraying will generally be scheduled for times near dusk and dawn, when mosquitoes are most active. The District will use spray materials that are the type used by homeowners, gardeners, farmers and pet
owners for insect control. The main ingredients of the spray are pyrethrins and piperonyl butoxide. Prior to this week for 2007, the District identified two groups of WNV positive mosquitoes in zip codes 95206 & 95219 and a WNV positive bird in zip code 95336. News releases and WNV surveillance activity will
be posted to www.sjgov.org/oes.

In 2006, there were 8 human cases, 12 horse cases, 46 groups of mosquitoes, and 19 sentinel chickens that tested positive for WNV in San Joaquin County.

West Nile Virus is transmitted to humans and animals through the bite of a mosquito. “West Nile Virus is here to stay and it is important that everyone take necessary precautions to avoid mosquito bites,” said Dr. Karen Furst, San Joaquin County Public Health Officer.

About one in five patients infected with West Nile Virus will develop symptoms of headache, fever and fatigue. About 1 in 150 people infected will develop severe illness with symptoms that may include neck stiffness, confusion, coma, tremors, convulsions, muscle weakness, numbness, and/or paralysis. Symptoms may
only last a few weeks but some neurological effects may be permanent.

Individuals may reduce their risk by taking precautions:

• Use insect repellent containing DEET or Picaridin when outdoors
• Avoid being outside at dawn and dusk when mosquitoes are most active
• When outside, wear long pants, long-sleeved shirts and other protective clothing
• Dispose of any standing water

Horses are also at risk. Horses infected with West Nile Virus may display signs of stumbling, staggering, wobbling, weakness, muscle twitching or inability to stand. Horse owners should contact their veterinarians to confirm their horses West Nile Virus vaccine is current.

Residents and visitors of San Joaquin County can obtain additional information on West Nile Virus including local mosquito control activities by calling the information line 209-469-8200 or on the web at www.sjgov.org/oes. Spray locations and times will normally be available 36 to 48 hours in advance. Report mosquito problems to the SJC Mosquito & Vector Control District at 1-800-300-4675 or 209-982-4675. Report all dead birds and tree squirrels to 1-877-968-2473 or www.westnile.ca.gov.

Aaron Devencenzi      
Public Information Officer     
SJC Mosquito & Vector Control District  
(209) 982-4675  

Karen McConnell

Public Information Officer

San Joaquin County

(209) 468-3417

                          Alameda County Mosquito Abatement District

                                            Celebrating 75 Years of Service to Alameda County Residents

HAYWARD – The Alameda County Mosquito Abatement District received confirmation for our first West Nile Virus positive bird in Alameda County for 2007. This is the County's first indication of active virus transmission this year. The bird was a Starling, picked up in the City of Hayward (Zip Code 94544) on June 19, 2007.

Use the following list to protect yourself from mosquito bites:

•  DRAIN: all sources of standing water that can support mosquito breeding, and don't overwater your lawn

•  DAWN and DUSK : Avoid spending time outside when mosquitoes are most active, especially at dawn and the first two hours after sunset

•  DEET : Apply insect repellent containing DEET or Picaridin according to label instructions

•  DRESS APPROPRIATELY: When outdoors, wear long pants and long-sleeved shirts (you can now buy clothing with insect repellent built into the fabric)

•  DOOR and window screens: Repair or replace screens that have tears or holes.

Contact us if you are being bothered by mosquitoes or know of a potential mosquito breeding source.

 

Most people who become infected with WNV do not experience symptoms or become ill. Only about one out every 150 people infected with WNV may develop a more severe form of the illness. Adults over 50 years old and people with weakened immune systems are at increased risk of serious complications from WNV infection. Anyone who develops symptoms such as a high fever, confusion, muscle weakness, severe headaches or stiff neck should seek medical care immediately.

As part of an on-going surveillance program, the Alameda County Mosquito Abatement District is asking the public to report any wild birds, specifically crows, ravens, jays, magpies and birds of prey that have been dead less than 48 hours (and show no signs of decomposition), to the California Department of Health Services. Their website address for reporting the dead birds is: www.westnile.ca.gov . They can also be reached by phone: 1. 877. WNV. BIRD (1. 877. 968. 2473).

Since horses are very susceptible to WNV, and the mortality rate for infected horses is exceptionally high, horse owners are advised to contact their veterinarians immediately about vaccinations.

As of June 22, 2007 in California WNV has been detected in 15 counties for a total of 1 human cases (no fatalities), 2 horses, 59 dead birds and 33 mosquito pools (pools are groups of ~50 mosquitoes tested together).

 The current surveillance program to monitor for WNV in California has been established by CDHS in collaboration with the University of California at Davis , California Department of Food and Agriculture, local mosquito and vector control districts and other state and local agencies.  

 The public can access information about mosquitoes and West Nile Virus on our website: www.mosquitoes.org . Residents can also pick up mosquito-larvae eating fish at our District office from 7:30-4:30pm for their fish ponds, horse troughs, etc. We are located in Hayward at 23187 Connecticut St . Our phone number is 510. 783. 7744.

For information concerning human West Nile Virus symptoms, prevention or testing please contact the Alameda County Public Health Department at 510. 267. 8001.

For information regarding horses and WNV, contact the California Department of Food and Agriculture:

call the Equine West Nile information line at 1. 800. 268. 7378

email WNVirus@cdfa.ca.gov

visit http://www.cdfa.ca.gov/ahfss/ah/wnv_info.htm

        News Release

CALIFORNIA DEPARTMENT OF HEALTH SERVICES

STATE HEALTH OFFICER ANNOUNCES FIRST CONFIRMED
HUMAN CASE OF WEST NILE VIRUS IN CALIFORNIA THIS YEAR

SACRAMENTO – A 21-year-old Kern County woman has tested positive for West Nile virus (WNV) infection, the first reported human case in California this year, State Public Health Officer Dr. Mark Horton announced today. The woman’s symptoms include fever, headache and body aches. She was not hospitalized.

“This first confirmed illness in California due to West Nile virus reminds us that we are moving into the high-risk season,” Horton said. “The most important step people can take to prevent exposure to West Nile virus is to protect themselves from being bitten by a mosquito. We are also requesting the public to report dead birds to assist state and local agencies with surveillance efforts.”

The positive test was reported to the Kern County Department of Public Health by a local blood bank where the patient had donated blood. She subsequently developed symptoms. “Special precautions are taken to test all blood donations for West Nile virus, so Californians can be assured that blood supplies are safe,” Horton said.

To date this year, WNV has been detected in 13 of California’s 58 counties in 57 dead birds, 18 mosquito samples, two sentinel chickens and one horse. In 2006, a total of 278 human WNV cases, including seven deaths, were reported in the 46 of 54 counties that detected WNV activity.

WNV is transmitted to humans and animals through a mosquito bite from a mosquito that has been infected by feeding on an infected bird. Although the risk of serious illness to most people is low, less than 1 percent of individuals will develop a more serious illness.

Horton reminded Californians of three simple ways to protect themselves from WNV:

• DEET – Apply inspect repellent containing DEET, picaradin or oil of lemon eucalyptus according to label instructions. Repellents keep the mosquitoes from biting you. DEET can be used safely on infants and children 2 months of age and older.

• DAWN AND DUSK – Mosquitoes that carry WNV bite in the early morning and evening so it is important to wear repellent at this time. Make sure that your doors and windows have tight-fitting screens to keep out mosquitoes. Repair or replace screens with tears or holes.

• DRAIN – Mosquitoes lay their eggs on standing water. Eliminate all sources of standing water on your property, including flower pots, old car tires, rain gutters and pet bowls. If you have a pond, use mosquito fish or commercially available products to eliminate mosquito larvae.

Governor Arnold Schwarzenegger has invested a total of $15 million over the last two years to enhance mosquito control efforts in California. This funding has supplemented the resources of existing mosquito control programs statewide and expanded efforts in areas of the state not covered to control WNV. This investment in equipment and other products to control mosquitoes continues to benefit mosquito control efforts this year.

For more information about WNV, visit www.westnile.ca.gov. In addition to reporting all dead birds, Californians are encouraged to report dead tree squirrels. The Web site includes information on the most common birds found with WNV. Dead birds and squirrels can be reported on the Web site or by calling (877) 968-2473.

Alameda County Public Health Department

1000 Broadway, Suite 500 – Oakland , CA 94607

Phone: 510.267.8001 Fax: 510.268.7012

September 1, 2006               Contact: Sherri Willis

First Human Case of West Nile Virus in Alameda County

The first human case of West Nile Virus (WNV) for the 2006 season has been confirmed in Alameda County . The case involves an adult male who recently moved to Alameda County from another part of California . The resident was hospitalized, treated and discharged on August 27, and is recovering at home.

“This patient does not remember being bitten by a mosquito, but did spend time in an area where an increased number of birds and mosquitoes have tested positive for WNV,” remarked Deputy County Health Officer Dr. Muntu Davis. “The risk of human disease is highest and will grow in areas with WNV activity. All residents should continue taking precautions to avoid mosquito bites.”

WNV activity is increasing in Alameda County . To date, 17 dead birds, 7 mosquito pools and 1 dead squirrel have tested positive for the virus. Livermore and Pleasanton are WNV hot spots with 14 of the dead birds and 6 of the mosquito pools.

California has reported two human deaths from West Nile Virus. As of August 29, WNV had been detected in 49 of the state's 58 counties in 117 humans, 25 horses, 688 dead birds, 575 mosquito pools, and 323 chickens.

WNV is transmitted to humans and animals through a mosquito bite. Mosquitoes become infected when they feed on infected birds. Human-to-human transmission of WNV generally does not occur.

County residents are urged to eliminate all sources of standing water that might breed mosquitoes. A green swimming pool or a fishpond without fish can produce thousands of hungry, biting mosquitoes during the summer.

To protect yourself from mosquito bites:

• Drain : All sources of standing water that can support mosquito breeding should be eliminated. Don't over water your lawn.
• Dawn and dusk: Avoid spending time outside when mosquitoes are most active,

especially at dawn and the first two hours after sunset.

• DEET: Apply insect repellent containing DEET or Picaridin according to instructions.
• Dress appropriately: Wear long pants and long-sleeved shirts when outside.
• Door and window screens : Repair or replace screens that have tears or holes.

Most people who become infected with WNV do not experience symptoms or become ill.

Persons who develop such symptoms as a high fever, confusion, muscle weakness, severe headaches or stiff neck should seek medical care immediately.

Alameda County 's extensive surveillance program includes mosquito trapping, catch basin sampling, sentinel chickens, dead bird reporting, and horse surveillance. Since horses are very susceptible to WNV, horse owners should contact their veterinarians about timely vaccinations.

The public can become part of the state's monitoring effort for WNV by reporting dead birds (crows, ravens, jays, sparrows and finches) that may have been dead for less than 48 hours to:

•  California Department of Health Services toll-free line: 877-WNV-BIRD or online www.westnile.ca.gov .

•  Alameda County Mosquito Abatement District at 510/ 783-7744; www.mosquitoes.org

•  Alameda County Vector Control (City of Albany only) 510/ 567.6800

  News Release

CALIFORNIA DEPARTMENT OF HEALTH SERVICES

SACRAMENTO – West Nile virus (WNV) has claimed the life of an elderly woman in Butte County, making her the first to die from complications associated with the virus this year in California, State Public Health Officer Dr. Mark Horton announced today.

“For most people, the risk of serious illness from West Nile virus is low, but this woman's death reminds us that we must take precautions to protect ourselves and our families from mosquito bites,” Horton said.

To date in 2006, WNV activity has been detected in 43 of California's 58 counties, and 50 individuals from 13 counties have become ill after exposure to WNV, including the woman who died.  WNV has been detected in 443 dead birds, 423 mosquito pools, 13 horses and 143 sentinel chickens.

California has one of the most comprehensive WNV surveillance and control systems in the United States.  In recognition of the key role these systems play in controlling WNV, Gov. Arnold Schwarzenegger included $3 million in one-time supplemental funds in his 2006-2007 budget that were recently distributed to 61 local agencies to enhance mosquito control and abatement efforts.

“California remains poised to respond immediately and appropriately when surveillance data indicate that the risk to humans posed by West Nile virus is increasing,” Horton said.

Most individuals who are infected with WNV will not experience any illness.  Recent data indicate that those with diabetes and/or hypertension are at greatest risk for serious illness.  The most effective ways for individuals to prevent WNV are:

· Apply insect repellent containing DEET, picaradin or oil of lemon eucalyptus, according to label instructions.

· Ensure doors and windows have tight-fitting screens.  Repair or replace screens that have tears or holes.

· Eliminate all sources of standing water that can support mosquito breeding.

For more information about WNV and to report dead birds, visit www.westnile.ca.gov or call toll-free 1-877-WNV-BIRD.

Alameda County Mosquito Abatement District

Celebrating 75 Years of Service to Alameda County Residents

TRI-VALLEY AREA IS HOT SPOT FOR WEST NILE VIRUS INFECTIONS

-- Of 10 birds in the County infected with West Nile Virus, 9 are from Tri-Valley area --

HAYWARD – West Nile Virus (WNV) activity is increasing rapidly in the county, and the Tri-Valley area is the hardest hit with 9 of the 10 WNV positive dead birds, and 2 of the 3 positive mosquito samples found there (see accompanying map). The number of WNV positive birds in the county more than doubled in just 6 days - from 4 to 10 - and all of our positive mosquitoes have been detected in the last week.

  “We predicted that the Tri-Valley area, being the warmest part of the county, would be the focus of West Nile Virus infections this year. That has proved to be the case so far” said District Manager John Rusmisel. “We need all residents of the county, especially those in the Tri-Valley area, to check their own front and backyards for any standing water. It takes only a tiny amount of water to breed mosquitoes.”

William Hamersky, Environmental Specialist for the District, recommends all residents follow the list below to protect yourself and your family, and do whatever you can to help spread the word that West Nile Virus is here. Talking to your neighbors about possible mosquito breeding sources in THEIR yard is a good idea because mosquitoes don't respect property lines. “A green swimming pool or a fishpond without fish can produce thousands of hungry, biting mosquitoes in a summer. They can make an entire neighborhood miserable, and possibly transmit West Nile Virus to you or a loved one.”

Use the following list to protect yourself from mosquito bites:

•  DRAIN: all sources of standing water that can support mosquito breeding, and don't overwater your lawn.

•  DAWN and DUSK : Avoid spending time outside when mosquitoes are most active, especially at dawn and the first two hours after sunset.

•  DEET : Apply insect repellent containing DEET or Picaridin according to label instructions.

•  DRESS APPROPRIATELY: When outdoors, wear long pants and long-sleeved shirts.

•  DOOR and window screens: Repair or replace screens that have tears or holes.

Contact us if you are being bothered by mosquitoes or know of a potential mosquito breeding source.

Most people who become infected with WNV do not experience symptoms or become ill. Only about one out every 150 people infected with WNV may develop a more severe form of the illness. Adults over 50 years old and people with weakened immune systems are at increased risk of serious complications from WNV infection. Anyone who develops symptoms such as a high fever, confusion, muscle weakness, severe headaches or stiff neck should seek medical care immediately.

As part of an on-going surveillance program, the Alameda County Mosquito Abatement District is asking the public to report any wild birds, specifically crows, ravens, jays, magpies and birds of prey that have been dead less than 48 hours (and show no signs of decomposition), to the California Department of Health Services. Their website address for reporting the dead birds is: www.westnile.ca.gov . They can also be reached by phone: 1. 877. WNV. BIRD (1. 877. 968. 2473).

Since horses are very susceptible to WNV, horse owners are advised to contact their veterinarians immediately about timely vaccinations.

To date this year in California WNV has been detected in 41 counties for a total of 38 human cases (0 fatalities), 13 horses (6 died or were euthanized), 443 dead birds and over 349 mosquito pools (pools are groups of ~50 mosquitoes tested together). In 2005 California had 935 human cases of West Nile Virus, including 19 fatalities.

 The current surveillance program to monitor for WNV in California has been established by CDHS in collaboration with the University of California at Davis , California Department of Food and Agriculture, local mosquito and vector control districts and other state and local agencies.  

 The public can access lots of information about mosquitoes and West Nile Virus on our website: www.mosquitoes.org . Residents can also pick up mosquito-larvae eating fish at our District office from 7:30-5:00pm for their fish ponds, horse troughs, etc. We are located in Hayward at 23187 Connecticut St . Our phone number is 510. 783. 7744.

For information concerning human West Nile Virus symptoms, prevention or testing please contact the Alameda County Public Health Department at 510. 267. 8001.

For information regarding horses and WNV, contact the California Department of Food and Agriculture:

call the Equine West Nile information line at 1-800-268-7378

email WNVirus@cdfa.ca.gov

visit http://www.cdfa.ca.gov/ahfss/ah/wnv_info.htm

Alameda County Mosquito Abatement District

Celebrating 75 Years of Service to Alameda County Residents

-- First mosquitoes positive for West Nile Virus in Alameda County for 2006 --

HAYWARD – Five mosquito pools (groups of ~50 mosquitoes collected and analyzed together) from Bay Farm Island were tested and one pool of Culex tarsalis was found positive for West Nile Virus (WNV). The mosquitoes were collected from 2 different sites on Bay Farm Island , within ¼ mile from the northern part of Shoreline Park , on July 24 and sent to the state's virus testing lab on August 01. The results were returned to us on Monday Aug 7.

  Our ongoing mosquito surveillance and larviciding program has been intensified on the northern part of Bay Farm Island , as has our adult mosquito trapping, to determine the extent of the infection. “Since these mosquitoes were “born and raised” in the County, this is our first real evidence of local West Nile Virus transmission in the County this year” said District Entomologist Bruce Kirkpatrick. “We have increased both the frequency and the number of adult mosquito traps in hopes of discovering “hot spots” where we will increase our control efforts.”

  District Manager John Rusmisel said “Since the virus is now active in our County, citizens should take ALL the precautions available against WNV. Use repellent and wear long sleeves and long pants when going outside; put screens on your windows and doors; get rid of any standing water in your backyard.”

Use the following list to protect yourself from mosquito bites:

•  DRAIN: all sources of standing water that can support mosquito breeding, and don't overwater your lawn

•  DAWN and DUSK : Avoid spending time outside when mosquitoes are most active, especially at dawn and the first two hours after sunset

•  DRESS APPROPRIATELY: When outdoors, wear long pants and long-sleeved shirts

•  DEET : Apply insect repellent containing DEET or Picaridin according to label instructions

•  DOOR and window screens: Repair or replace screens that have tears or holes.

  Contact us if you are being bothered by mosquitoes or know of a potential mosquito breeding source.

Most people who become infected with WNV do not experience symptoms or become ill. Only about one out every 150 people infected with WNV may develop a more severe form of the illness. Adults over 50 years old and people with compromised immune systems are at increased risk of serious complications from WNV infection. Anyone who develops symptoms such as a high fever, confusion, muscle weakness, severe headaches or stiff neck should seek medical care immediately.

As part of an on-going surveillance program, the Alameda County Mosquito Abatement District is asking the public to report any wild birds, specifically crows, ravens, jays, magpies and birds of prey that have been dead less than 48 hours (and show no signs of decomposition), to the California Department of Health Services. Their website address for reporting the dead birds is: www.westnile.ca.gov . They can also be reached by phone: 1. 877. WNV. BIRD (1. 877. 968. 2473).

Since horses are very susceptible to WNV and two different vaccines are available for horses, horse owners are advised to contact their veterinarians about timely vaccinations.

To date this year in California WNV has been detected in 36 counties for a total of 20 human cases (0 fatalities), 8 horses, over 300 dead birds and 277 mosquito samples. In 2005 California had 935 human cases of West Nile Virus including 19 fatalities.

 The current surveillance program to monitor for WNV in California has been established by CDHS in collaboration with the University of California , Davis , California Department of Food and Agriculture, local mosquito and vector control districts and other state and local agencies.  

 The public can access lots of information about mosquitoes and West Nile Virus on our website: www.mosquitoes.org . Residents can also pick up mosquito-larvae eating fish at our District office from 7:30-4:30pm for their fish ponds, horse troughs, etc. We are located in Hayward at 23187 Connecticut St . Our phone number is 510. 783. 7744. For information concerning West Nile Virus symptoms, prevention or testing please contact the Alameda County Public Health Department at 510. 267. 8001.

Alameda County Mosquito Abatement District

Celebrating 75 Years of Service to Alameda County Residents

HAYWARD – The Alameda County Mosquito Abatement District picked up 2 dead birds yesterday, tested them in-house and found them positive for West Nile Virus (WNV). This is the County's first indication of active virus transmission this year. Both birds were American Crows, picked up in the City of Pleasanton (Zip Code 94566), and were tested on our lab's RAMP equipment.

  Since West Nile Virus is a mosquito-transmitted disease, controlling the mosquito population is paramount. With the late rains and unseasonably hot weather last week, mosquito populations can increase dramatically if control measures are not implemented. “We predicted that the Tri-Valley area, being the warmest part of the county, would be the focus of West Nile Virus infections this year. That has proved to be the case so far” said District Manager John Rusmisel. “We need all residents of the county, especially those in the Tri-Valley area, to check their own front and backyards for any standing water. It takes only a tiny amount of water to breed mosquitoes.”

Rusmisel said “Don't wait until someone you know gets sick with West Nile Virus before taking steps to protect yourself from mosquitoes. Do it now! Use repellent and wear long sleeves and long pants when going outside; put screens on your windows and doors; get rid of any standing water in your backyard.”

Use the following list to protect yourself from mosquito bites:

•  DRAIN: all sources of standing water that can support mosquito breeding, and don't overwater your lawn

•  DAWN and DUSK : Avoid spending time outside when mosquitoes are most active, especially at dawn and the first two hours after sunset

•  DEET : Apply insect repellent containing DEET or Picaridin according to label instructions

•  DRESS APPROPRIATELY: When outdoors, wear long pants and long-sleeved shirts (you can now buy clothing with insect repellent built into the fabric)

•  DOOR and window screens: Repair or replace screens that have tears or holes.

Contact us if you are being bothered by mosquitoes or know of a potential mosquito breeding source.

 

Most people who become infected with WNV do not experience symptoms or become ill. Only about one out every 150 people infected with WNV may develop a more severe form of the illness. Adults over 50 years old and people with weakened immune systems are at increased risk of serious complications from WNV infection. Anyone who develops symptoms such as a high fever, confusion, muscle weakness, severe headaches or stiff neck should seek medical care immediately.

As part of an on-going surveillance program, the Alameda County Mosquito Abatement District is asking the public to report any wild birds, specifically crows, ravens, jays, magpies and birds of prey that have been dead less than 48 hours (and show no signs of decomposition), to the California Department of Health Services. Their website address for reporting the dead birds is: www.westnile.ca.gov . They can also be reached by phone: 1. 877. WNV. BIRD (1. 877. 968. 2473).

Since horses are very susceptible to WNV, and the mortality rate for infected horses is exceptionally high, horse owners are advised to contact their veterinarians immediately about vaccinations.

To date this year in California WNV has been detected in 30 counties for a total of 17 human cases (no fatalities), 5 horses (3 died or were euthanized), 219 dead birds and 277 mosquito pools (pools are groups of ~50 mosquitoes tested together). In 2005 California had 935 human cases of West Nile Virus including 19 fatalities.

 The current surveillance program to monitor for WNV in California has been established by CDHS in collaboration with the University of California at Davis , California Department of Food and Agriculture, local mosquito and vector control districts and other state and local agencies.  

 The public can access information about mosquitoes and West Nile Virus on our website: www.mosquitoes.org . Residents can also pick up mosquito-larvae eating fish at our District office from 7:30-4:30pm for their fish ponds, horse troughs, etc. We are located in Hayward at 23187 Connecticut St . Our phone number is 510. 783. 7744.

For information concerning human West Nile Virus symptoms, prevention or testing please contact the Alameda County Public Health Department at 510. 267. 8001.

For information regarding horses and WNV, contact the California Department of Food and Agriculture:

call the Equine West Nile information line at 1. 800. 268. 7378

email WNVirus@cdfa.ca.gov

visit http://www.cdfa.ca.gov/ahfss/ah/wnv_info.htm

  News Release

CALIFORNIA DEPARTMENT OF HEALTH SERVICES

SACRAMENTO – Four individuals, one each from Kern, Stanislaus, San Joaquin and Sutter counties, have been confirmed with West Nile virus (WNV) infections this week in California, State Public Health Officer Dr. Mark Horton announced today.  The individuals from San Joaquin County and Kern County developed neurological disease.  Three of the individuals were hospitalized and released.

“We have been experiencing a heat wave with temperatures in some areas consistently above 100 degrees, which is conducive to mosquito breeding and virus replication,” Horton said. “As a result, we expect a rapid rise in mosquito activity over the next few weeks.  Californians really need to step up their efforts to protect themselves from mosquito bites when outside, especially those individuals who work outdoors, such as construction and landscaping workers.”

The four confirmed cases this week increase the number of human WNV infections reported so far this year in California to five.  The first human case was confirmed last month in Kern County .  In 2005, a total of 935 human WNV infections were reported in 40 counties, including 19 deaths.

So far this year, WNV has been detected in 26 of California 's 58 counties in 151 dead birds, 62 mosquito pools and seven sentinel chickens.  The California Department of Food and Agriculture has reported three case of WNV in horses, including two in Merced County and one in Tulare County .  The Tulare County horse and one of the horses in Merced County died.

The California Department of Health Services (CDHS) uses a geographic information system to map dead bird reports.  The 23,000 dead bird reports received from the public have helped identify areas with high concentrations of mosquitoes with WNV.  With this information, local mosquito control agencies have been able to target their efforts to reduce mosquito populations and prevent human illness.

In the 2005-2006 budget, the Governor included $12 million to enhance and expand mosquito control efforts statewide.  The Governor invested an additional $3 million in the 2006-2007 budget to supplement existing mosquito control activities in high-risk areas and "hot spots".

WNV is transmitted to humans and animals through a mosquito bite.  Mosquitoes become infected when they feed on infected birds.  Health officials emphasize that the risk of serious illness to humans is low.  Most individuals who are infected with WNV will not experience any illness.  A review of data collected by CDHS' Viral and Rickettsial Disease Laboratory in Richmond indicate that people with diabetes and or hypertension are at increased risk to develop more serious complications from WNV.   

Horton reminded Californians that the three most effective ways to prevent WNV are:

· Apply insect repellent containing DEET, picaradin or oil of lemon eucalyptus, according to label instructions.

· Ensure doors and windows have tight-fitting screens.  Repair or replace screens that have tears or holes.

· Eliminate all sources of standing water that can support mosquito breeding.

For more information about WNV and to report dead birds, call 1-877-WNV-BIRD (1-877-968-2473) or visit www.westnile.ca.gov .  The Web site is updated every Tuesday and Friday at 4 p.m. PDT .

  News Release

CALIFORNIA DEPARTMENT OF HEALTH SERVICES

SACRAMENTO – A 27-year-old Kern County man has been infected with West Nile virus (WNV), the first reported human case in California this year, State Public Health Officer Dr. Mark Horton announced today. The man is hospitalized with the neurological form of WNV infection.

“This first confirmed human West Nile virus infection in California reminds us that we are moving into the high-risk season with the arrival of hot weather,” Horton said. “The two most important steps people can take to prevent West Nile virus is to protect themselves from being bitten by a mosquito and to report dead birds to assist the state and local agencies with surveillance efforts.”

Tests conducted by the California Department of Health Services’ Viral and Rickettsial Disease Laboratory in Richmond confirmed the WNV infection. To date, WNV has been detected in 13 of California’s 58 counties in 31 dead birds and 11 mosquito samples. In 2005, a total of 935 human WNV infections were reported in 40 counties, including 19 deaths.

WNV is transmitted to humans and animals through a mosquito bite from a mosquito that has been infected by feeding on an infected bird. Although the risk of serious illness to most people is low, less than 1 percent of individuals will develop a more serious illness.

Horton urged Californians to take these simple steps to protect themselves from mosquito bites and WNV:

Apply insect repellent containing DEET, picaradin or oil of lemon eucalyptus, according to label instructions, whenever you are outside.
Eliminate all standing water in buckets, flowerpots, old tires, gutters and other sources of standing water that can support mosquito breeding.
Be sure all window and door screens fit tightly and have no rips or tears.
Wear long sleeves and long pants if you’re going to be out at dawn or dusk, when mosquitoes are most active.

Approximately 80 percent of people who are infected with WNV will have no symptoms. Up to 20 percent of the people who become infected will display symptoms such as fever, headache, body aches, nausea, vomiting, and sometimes swollen lymph glands or a skin rash on the chest, stomach and back. Less than one percent of infected individuals infected will develop severe illness that can include high fever, headache, neck stiffness, stupor, disorientation, coma, tremors, convulsions, muscle weakness, vision loss, numbness and paralysis.

For more information about WNV, visit www.westnile.ca.gov. The public is strongly encouraged to report dead birds on the Web site or by calling toll-free 1-877-WNV-BIRD (1-877-968-2473).

  News Release

CALIFORNIA DEPARTMENT OF HEALTH SERVICES

SACRAMENTO – Heavy rain and warm weather are perfect ingredients for breeding mosquitoes that carry West Nile virus (WNV), State Public Health Officer Dr. Mark Horton warned today.

“While no predictions can be made on the severity of West Nile virus this season, record rainfall this spring has saturated yards to create perfect breeding grounds for mosquitoes,” Horton said.  “Californians need to take precautions to protect themselves from mosquito bites by eliminating all sources of standing water that can support mosquito breeding and applying insect repellent containing DEET.”

Horton encouraged the public to remain vigilant and “fight the bite” during an event at the State Capitol to mark WNV Awareness Week, April 24 to 30.  WNV was first detected in California four years ago.  So far this year, WNV has been detected in 12 birds in Orange, Sacramento, San Diego, Santa Clara and Ventura counties.

In 2005, a total of 935 human WNV infections, including 19 deaths, were reported in the 54 counties that detected WNV activity.  Of the 456 horses that also tested positive for WNV, 200 died or were euthanized.

WNV is transmitted to humans and animals through a mosquito bite.  Mosquitoes become infected when they feed on infected birds.  Health officials emphasized that the risk of serious illness to humans is low.  Most individuals who are infected with WNV will not experience any illness.  However, elderly individuals and those with compromised immune systems are at greatest risk for serious illness.  Individuals with diabetes or hypertension also appear to be more prone to develop more serious complications from WNV, according to research by CDHS' Viral and Rickettsial Disease Laboratory.

Last year, Governor Arnold Schwarzenegger included $12 million in the state budget to supplement the resources of existing mosquito control programs statewide and to expand efforts in areas of the state currently not covered to combat WNV.  That investment in equipment and other products to control mosquitoes continues to benefit mosquito control efforts this year.

The California Department of Health Services (CDHS) will continue to use a sophisticated geographic information system it began using last year to track regions at elevated risk for WNV.  The system is able to produce detailed color maps that identify the locations of birds that succumbed to WNV and indicate with a high degree of accuracy the areas where human WNV illnesses are more likely to occur.  The system is determining the areas for enhanced surveillance and control efforts by local agencies.

Horton recommended four simple ways for individuals to protect themselves from WNV:

• Eliminate all standing water buckets, flowerpots, old tires, gutters and other sources of standing water that can support mosquito breeding.
• Wear DEET, the most effective insect repellent, picaradin or oil of lemon eucalyptus.
• Wear long sleeves and long pants if you're going to be out at dawn or dusk, when mosquitoes are most active.
• Make sure all window screens in the home are in good repair and functional.

Californians are encouraged to report dead birds by calling toll-free 1-877-WNV-BIRD (1-877-968-2473) or logging on to www.westnile.ca.gov .

Alameda County Mosquito Abatement District

Celebrating 75 Years of Service to Alameda County Residents

-- Horse infected with West Nile Virus euthanized in Alameda County--

HAYWARD – A 15 year-old Norwegian Fjord Horse mare was euthanized on Aug 07, one day after showing signs of a West Nile Virus (WNV) infection. The horse was boarded in NE Alameda County, near Altamont Pass Road . This is the first documented case of a horse locally infected with WNV in Alameda County . There have been no human cases in Alameda County this year to date.

  “The horse did not travel out of county and, unfortunately, was not vaccinated against West Nile Virus” said Environmental Specialist William Hamersky. “We are saddened by the loss of this horse, and implore all horse owners to get their horses vaccinated immediately against West Nile Virus.” There are currently 2 vaccines available for horses but none for humans.

  District Manager John Rusmisel said “Don't wait until someone you know gets sick with West Nile Virus before taking steps to protect yourself from mosquitoes. Do it now! Use repellent and wear long sleeves and long pants when going outside; put screens on your windows and doors; get rid of any standing water in your backyard.”

Use the following list to protect yourself from mosquito bites:

•  DRAIN: all sources of standing water that can support mosquito breeding, and don't overwater your lawn

•  DAWN and DUSK : Avoid spending time outside when mosquitoes are most active, especially at dawn and the first two hours after sunset

•  DEET : Apply insect repellent containing DEET or Picaridin according to label instructions

•  DRESS APPROPRIATELY: When outdoors, wear long pants and long-sleeved shirts (you can even buy clothing with insect repellent built into the fabric)

•  DOOR and window screens: Repair or replace screens that have tears or holes.

Contact us if you are being bothered by mosquitoes or know of a potential mosquito breeding source.

Most people who become infected with WNV do not experience symptoms or become ill. Only about one out every 150 people infected with WNV may develop a more severe form of the illness. Adults over 50 years old and people with weakened immune systems are at increased risk of serious complications from WNV infection. Anyone who develops symptoms such as a high fever, confusion, muscle weakness, severe headaches or stiff neck should seek medical care immediately.

As part of an on-going surveillance program, the Alameda County Mosquito Abatement District is asking the public to report any wild birds, specifically crows, ravens, jays, magpies and birds of prey that have been dead less than 48 hours (and show no signs of decomposition), to the California Department of Health Services. Their website address for reporting the dead birds is: www.westnile.ca.gov . They can also be reached by phone: 1. 877. WNV. BIRD (1. 877. 968. 2473).

Since horses are very susceptible to WNV, horse owners are advised to contact their veterinarians immediately about timely vaccinations.

To date this year in California WNV has been detected in 49 counties for a total of 175 human cases (5 fatalities), 148 horses, over 1300 dead birds and over 700 mosquito pools (pools are groups of ~50 mosquitoes tested together). In 2004 California had 830 human cases of West Nile Virus including 28 fatalities.

 The current surveillance program to monitor for WNV in California has been established by CDHS in collaboration with the University of California at Davis , California Department of Food and Agriculture, local mosquito and vector control districts and other state and local agencies.  

 The public can access lots of information about mosquitoes and West Nile Virus on our website: www.mosquitoes.org . Residents can also pick up mosquito-larvae eating fish at our District office from 7:30-4:30pm for their fish ponds, horse troughs, etc. We are located in Hayward at 23187 Connecticut St . Our phone number is 510. 783. 7744.

For information concerning human West Nile Virus symptoms, prevention or testing please contact the Alameda County Public Health Department at 510. 267. 8001.

For information regarding horses and WNV, contact the California Department of Food and Agriculture:

call the Equine West Nile information line at 1-800-268-7378

email WNVirus@cdfa.ca.gov

visit http://www.cdfa.ca.gov/ahfss/ah/wnv_info.htm

Press Release

Alameda County Mosquito Abatement District

HAYWARD – Two dead American Crows and 1 Barn Owl were confirmed positive for West Nile Virus (WNV) yesterday afternoon by the California Department of Health Services virus-testing laboratory. One crow was found in Berkeley and a crow and Barn Owl were found in Livermore . This is the first instance of West Nile Virus activity in Alameda County . No human cases of locally acquired West Nile Virus have occurred in Alameda County so far. Bruce Kirkpatrick, the staff entomologist said “We knew the virus would find its way into Alameda County this year. Now that we have confirmed virus activity in the county, we will be increasing our surveillance and treatments.”

“Local surveillance efforts have provided the early warning that we hoped for,” said District Manager John Rusmisel. “Because the virus is now present in Alameda County it is important that everyone take a few simple precautions to reduce their risk of mosquito bites, which are the primary method of transmission for the virus.” We refer to this list as the “ 6 D's” to help people remember them:

•  DRAIN: all sources of standing water that can support mosquito breeding

•  DAWN and DUSK : Avoid spending time outside when mosquitoes are most active, especially at dawn and the first two hours after sunset

•  DRESS APPROPRIATELY: When outdoors, wear long pants and long-sleeved shirts

•  DEET : Apply insect repellent according to label instructions; those containing DEET work best

•  DOOR and window screens: Repair or replace screens that have tears or holes.

•  Contact us if you are being bothered by mosquitoes or know of a potential mosquito breeding source.

Most people who become infected with WNV do not experience symptoms or become ill. Only about one out every 150 people infected with WNV may develop a more severe form of the illness. Adults over 50 years old and people with compromised immune systems are at increased risk of serious complications from WNV infection. Anyone who develops symptoms such as a high fever, confusion, muscle weakness, severe headaches or stiff neck should seek medical care immediately.

As part of an on-going surveillance program, the Alameda County Mosquito Abatement District is asking the public to report any wild birds, specifically crows, ravens, jays, magpies and birds of prey that have been dead less than 48 hours (and show no signs of decomposition), to the California Department of Health Services. Their website address for reporting the dead birds is: www.westnile.ca.gov . They can also be reached by phone: 1. 877. WNV. BIRD (1. 877. 968. 2473).

Since horses are very susceptible to WNV and two different vaccines are available for horses, horse owners are advised to contact their veterinarians about timely vaccinations.

To date this year in California WNV has been detected in 22 counties for a total of 85 human cases (2 fatalities), 44 horses, over 1,000 dead birds and 341 mosquito pools.

 The current surveillance program to monitor for WNV in California has been established by CDHS in collaboration with the University of California , Davis , California Department of Food and Agriculture, local mosquito and vector control districts and other state and local agencies.  

 The public can access more information about mosquitoes and West Nile Virus on our website: www.mosquitoes.org . Residents can also pick up mosquito-larvae eating fish at our District office from 7:30-4:00pm for their fish ponds, horse troughs, etc. We are located in Hayward at 23187 Connecticut St. , off Depot Rd. Our phone number is 510. 783. 7744. For information concerning human aspects of West Nile Virus (e.g., symptoms, prevention, testing) please contact the Alameda County Public Health Department at 510. 267. 8001.

News Release
CALIFORNIA DEPARTMENT OF HEALTH SERVICES

July 22, 2004

 State Public Health Officer announces California's first death from West Nile Virus

Virus also found in eight new California counties

SACRAMENTO – West Nile virus (WNV) has claimed the life of a 57-year old Orange County man, making him the first to die in California from the virus, Dr. Richard Joseph Jackson, state public health officer, announced today. In addition, WNV has been detected for the first time in Butte, Kings, Mendocino, Sacramento, San Diego, San Joaquin, Tehama and Tulare counties, raising to 16 the number of counties where the virus has been detected, Jackson said. Tests conducted on dead birds in those counties were positive for the virus.

“The loss of this man is a sad reminder of the seriousness of West Nile virus,” Jackson emphasized. “Although the risk of serious illness to most people is low, I urge residents to take steps now to protect themselves from mosquito bites and this virus."

The man was hospitalized with encephalitis in mid-June and died June 24. Preliminary tests for WNV were positive at a commercial laboratory. Further testing yesterday at the California Department of Health Services confirmed WNV infection.

To date, 35 Californians have tested positive for WNV, including 20 in San Bernardino County , eight in Los Angeles County , six in Riverside County and the individual who died in Orange County . WNV has also been detected in Imperial, Kern, Santa Clara and Ventura counties.

Most individuals who are infected with WNV will not experience any illness. Approximately 10 percent to 15 percent of infected individuals will have only mild to moderate symptoms, such as fever, headache and body aches. Less than 1 percent of individuals will develop serious neurologic illness such as encephalitis and meningitis. The elderly and those with lowered immune systems are more susceptible to serious illness.

In recognition of the public health threat posed by WNV, Gov. Arnold Schwarzenegger included $977,000 in state funds in the May revision of the proposed state budget to boost California 's efforts to monitor and control the spread of WNV. The funds would be used to expand surveillance activities to enhance detection of the virus and prompt control efforts.

WNV is transmitted to humans and animals through a mosquito bite. Mosquitoes become infected when they feed on infected birds. Individuals can reduce their risk of mosquito-borne diseases by taking these precautions:

•  Avoid spending time outside when mosquitoes are most active, especially at dawn and the first two hours after sunset.

•  When outdoors, wear long pants and long-sleeved shirts.

•  Apply insect repellant containing DEET according to label instructions.

•  Make sure that doors and windows have tight-fitting screens. Repair or replace screens that have tears or holes.

•  Eliminate all sources of standing water that can support mosquito breeding.

•  Contact your local mosquito and vector control agency if there is a significant mosquito problem where you live or work.

The state's current interagency surveillance system for WNV includes testing of dead birds, mosquitoes, sentinel chickens, horses and people. Jackson asked the public to assist in the extensive monitoring effort for the virus by reporting any crows, ravens, magpies and jays that have been dead for less than 48 hours to CDHS' toll-free hotline: 1-877-WNV-BIRD. Individuals should take note of the bird's location and condition before calling for further instructions, including assistance with identifying the type of bird found. The bird should show no signs of decomposition or maggot infestation. While there is no evidence that people can get WNV from handling live or dead infected birds, individuals should not attempt to catch or handle them. If the local agency is unable to pick up the bird, individuals should use gloves, a shovel or newspaper to put it in a plastic bag and place it in the trash.

Through this year as of today, WNV has been found in 980 dead birds, including 283 in San Bernardino County, 525 in Los Angeles County, 114 in Riverside County, 42 in Orange County, four in Sacramento County, three in Ventura County and one each in Butte, Kern, Kings, Mendocino, San Diego, San Joaquin, Santa Clara, Tehama and Tulare counties. In addition, the virus has been detected in 171 "pools" of mosquitoes collected in Imperial, Kern, Los Angeles, Orange, Riverside and San Bernardino counties and 75 sentinel chickens in Imperial, Los Angeles and Riverside counties.

The current surveillance program to monitor for WNV in California has been established by CDHS in collaboration with the University of California , Davis , California Department of Food and Agriculture, local mosquito and vector control districts, local health departments and other state and local agencies.

WNV has also infected 26 horses in Riverside and San Bernardino counties. Eleven have died. Since horses are susceptible to WNV and a vaccine is available for horses, horse owners are advised to contact their veterinarians about timely vaccinations.

For more information about WNV in California or to report dead birds online, visit CDHS' Web site at http://www.westnile.ca.gov/.

More information on West Nile Virus...
	CDC (Centers for Disease Control and Prevention):  The direct link to the CDC's webpage regarding the West Nile Virus.
	California DHS:  The State Department of Health Services website
	The CDC West Nile map:  A map of the United States showing the progress of the West Nile Virus.
	ACMAD State Map:  Our own map of the state, showing detailed progress of the West Nile Virus in birds, horses and humans county by county.
	UC Davis Center for Equine Health--WNV in horses:  Information and links on the West Nile Virus and how it affects horses.
	California Vectorborne Disease Surveillance System:  A cooperative effort by UC Davis, the Mosquito and Vector Control Association of California, and the California DHS.
	NBII--West Nile Virus: The National Biological Information Infrastructure's page dealing with the West Nile Virus.
	California West Nile Virus Surveillance Information Center:  The state government's page on the West Nile Virus.
	CDFA--Animal Healthcare--West Nile:  The California Department of Food & Agriculture's page on the West Nile Virus--an excellent resource for horse owners.