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Breaking News: Health Advisory for Contra Costa County

Last updated: November 16, 2018, 9:52 am

Poor air quality in Contra Costa is expected to continue through the weekend due to the Camp Fire in Butte County. Stay indoors when possible and keep doors and windows closed. Avoid prolonged outdoor activity. Masks are not a substitute for staying indoors. Seek medical attention if you experience symptoms such as difficulty breathing, persistent coughing, wheezing, chest tightness, heart palpitations, nausea, fatigue or light-headedness. Visit baaqmd.gov for air quality information. Visit airnow.gov for current air quality conditions in your zip code. Visit cchealth.org/wildfire for smoke-related health information.

West Nile Virus

Provider Information


A review of hospital discharge data from 2009-2010 found that 80% of patients with illness potentially compatible with neuro-invasive arboviral disease were not tested for WNV. While there is no specific treatment for WNV, testing can help differentiate WNV from other conditions, provide anticipatory guidance for patients as they experience potentially lingering symptoms, and help mosquito control and public health agencies institute proper control measures to prevent further cases.

Reporting Criteria

Report any suspect case of WNV within one working day of identification to Contra Costa Public Health Communicable Disease Programs by phone at 925-313-6740 or fax the West Nile Virus Case Report Form to 925-313-6465.

Laboratory Testing

WNV testing is available through Contra Costa Public Health Laboratory by completing the Laboratory Requisition Slip. Regarding specific information on WNV specimen submittal please refer to the posted health advisory. For additional assistance with submittal call Contra Costa Public Health Laboratory at 925-370-5775.

Remember to submit specimens with the West Nile Virus Infection Case Report Form.

Additional Resources


Physicians who need to report a suspected public health emergency should contact the Public Health division immediately at 925-313-6740; or after hours, call the sheriff's dispatch at 925-646-2441 and ask for the Health Officer On Call.


See more information designed specifically for health care providers.