Zika virus was first identified 1947 and is named after the Zika Forest in Uganda. The first human cases were documented in 1952. Since it’s discovery, the virus has been found in both mosquitoes and humans in Africa, the Pacific Islands, Southeast Asia, and the Americas.
Zika is spread to people primarily through the bite of an infected Aedes aegypti or Aedes albopictus mosquito. These mosquitoes are not from California but have been found in many areas in the state. Two adult female Aedes aegypti mosquitoes were found in Alameda County in May of 2015. No Aedes aegypti eggs, larvae, pupae, or adults have found in Alameda County since then. The District has an active surveillance program for invasive mosquitoes. More information about these invasive mosquitoes is available here.
Always report mosquito problems, especially daytime biting mosquitoes, to the Alameda County Mosquito Abatement District at (510)783-7744 or online at http://www.mosquitoes.org/services/.
Zika virus has not been found in mosquitoes in Alameda County. When traveling to areas with virus activity take proper precautions.
California Department of Public Health Zika page
Centers for Disease Control and Prevention Zika page