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West Nile Virus Risk in San Mateo County

In recent weeks, a total of nine dead birds infected with West Nile virus have been found in San Mateo County, leading the District to be concerned that there may be adult mosquitoes infected with West Nile virus in our area.

Press release

From California Department of Public Health: CDPH Reports Increased West Nile Virus Activity Statewide
FOR IMMEDIATE RELEASE

Sacramento, CA – July 20, 2016

The California Department of Public Health (CDPH) is reporting increased West Nile virus activity across the state and is investigating numerous suspect cases in humans. While the first human case has not been confirmed by CDPH, a resident of Los Angeles County has symptoms consistent with West Nile virus disease. Initial tests on that patient indicate a probable West Nile virus diagnosis, which requires further testing for confirmation. 

Press release

Hantavirus Risk in San Mateo County
FOR IMMEDIATE RELEASE:

Hantavirus Risk in San Mateo County

Burlingame, CA – July 14, 2016

San Mateo County Mosquito and Vector Control District continues to find evidence of hantavirus infection in deer mice collected during routine rodent-borne disease surveillance. The most recent samples were collected during May and June of 2016 in the vicinity San Bruno Mountain and Montara.

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Aedes eggs
New test to determine species

The District continues monitoring for the presence of Aedes aegypti mosquitoes in Menlo Park.  One method of monitoring is ovicups, small black plastic cups that are halfway filled with water.  Inside the cup is placed a tongue depressor, wrapped with a brown coffee filter.  This filter paper acts as an oviposition site for a female Aedes aegypti mosquito to lay her eggs.  Once a week, one of the laboratory staff collects the paper-wrapped tongue depressors from the 14 ovicups in Menlo Park and 28 ovicups in cemeteries throughout the county.  In th

Publication

July 2016 District Report

In this month’s District Report: West Nile virus and birds, bed bug facts, and more.

Click here to read the July 2016 District Report.

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Mosquito Control Operations, June 2016

The graph below shows the service requests responded to by our Vector Control Technicians in June, 2016. For a larger view, click the graph.

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CO2 Mosquito Trap Results, June 2016

The graphic to the left shows the number of each mosquito species found in our CO2 mosquito traps in June 2016. Find out more about our mosquito surveillance program.

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