Zika Virus Disease Updated Advisory

As of 9/16/16, the CDC has described the characteristics of 2,382 confirmed or probable cases of Zika virus disease with symptom onset during January 1–July 31, 2016. Most (99%) cases were travel-associated, with 98% reporting travel to an area with Zika transmission, and 1% reporting sexual contact with a returning traveler. United States acquired cases included 26 mosquito-borne cases, one laboratory-acquired infection, and one patient with unknown transmission mode. Sixty-five (3%) patients were hospitalized, and one died. For details, please see http://dx.doi.org/10.15585/mmwr.mm6536e5.

Alameda County has reported 20 cases of Zika virus infections & California has reported 348 (including 43 pregnant women, and 2 infants with birth defects, and 3 due to sexual transmission) as of 10/21/16. All California cases are travel-associated, with no locally acquired mosquito borne transmission.

Local Case Counts

For updated information on Zika cases in Alameda County and California, please refer to ACPHD Zika website. Case counts will be updated weekly on Fridays.

Areas with Active Mosquito-Borne Zika Transmission

For information on areas of the world, including parts of the United States, with active Zika virus transmission, please refer to http://www.cdc.gov/zika/geo/index.html

This Zika health advisory summarizes key updates since the last Zika health advisory on 8/6/16. The key updates include new information and guidance for prevention of sexual and travel- associated Zika transmission, Zika testing criteria and availability, and specialty society clinical practice guidelines for managing pregnant women, fetal evaluation, and evaluating and managing infants with possible congenital Zika virus infection. We will be issuing further health advisory updates as relevant information becomes available.

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