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Breaking News: Health Advisory for Contra Costa County

Last updated: November 10, 2018, 12:38 pm

The Bay Area Air Quality Management District reports that parts of our county have unhealthy air due to smoke. Please follow the following tips to protect yourself and your loved ones. Everyone, especially children, should reduce outdoor activity. Active children and adults, and people with respiratory disease such as asthma, should avoid prolonged outdoor activity. Masks are not a substitute for staying indoors. Masks such as the N-95 are not effective for untrained users and may be dangerous for people with lung or heart conditions. N-95 masks may be helpful for people who must work outdoors if properly fitted. Employees should work with their employers for direction on when/how to use N-95 masks. Seek medical attention if you experience symptoms like repeated coughing, difficulty breathing, wheezing, chest tightness, palpitations, nausea, fatigue or lightheadedness. Visit cchealth.org for smoke tips and airnow.gov for air quality in your area

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.