Epidemiology & Assessment

Raw Goat Milk Associated with Campylobacter Cases in Orange CountyThree cases of Campylobacter infection have been identified in the last three weeks in Orange County children who drank raw goat milk distributed by Claravale Farm prior to illness. The Orange County Health Care Agency (OCHCA) is working with the California Department of Public Health to further investigate this situation. OCHCA advises against consuming Claravale Farm raw goat milk at this time.

Orange County reports its first West Nile Virus Positive Mosquito SampleMay 22, 2015
This sample was collected during the week of May 15 in Tustin and tested by Orange County Mosquito and Vector Control District (OCMVCD). It is the first indication of West Nile virus (WNV) in the County this season.


Aedes Aegypti Identified in Orange CountyMay 1, 2015
Aedes Aegypti, also known as the yellow fever mosquito, was identified by the Orange County Mosquito and Vector Control District (OCMVCD) in an Anaheim residence last week. OCMVCD is conducting surveillance in the area to assure that there is no wider spread of the mosquito. A. Aegypti can act as a vector to spread several viruses, including chikungunya, dengue, and yellow fever. There have been no locally-acquired cases of these viruses in Orange County or California, but an Orange County resident could acquire one of these infections while traveling and provide a viral source for A. aegypti upon return.


Certain communicable diseases are required to be reported to the local health department (see List of Reportable Diseases) as per the State of California Code of Regulations. Epidemiology and Assessment (E&A) unit's medical directors, public health nurses, and epidemiologists investigate individual cases and outbreaks of reported communicable diseases. We monitor disease trends, and often provide current statistics and other information to doctors, hospitals, the public and news media. We may also provide education or preventive treatment in some circumstances. Although other units handle reports of HIV/AIDS, tuberculosis (TB) or sexually transmitted diseases (STDs), we do monitor their trends in Orange County. For more information or to report a Public Health emergency 24/7 call 714-834-8180.

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