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Total of Seven Confirmed WNV Cases in Sutter County
September 17, 2013
Total of Seven Confirmed WNV Cases in Sutter County

Prevent Mosquito Bites to Prevent West Nile Virus Infection

Seven persons have now been confirmed with West Nile virus illness in Sutter County, with one with West Nile Fever and six with the more serious neuroinvasive type of West Nile virus (WNV) illness. The persons live all around the county, reflecting the wide-spread distribution of West Nile virus activity found by the Sutter-Yuba Mosquito and Vector Control District during this season.

The Sutter-Yuba Mosquito and Vector Control District (SYMVCD) continues to monitor for West Nile virus activity, but has not detected any positive mosquito samples during the past two weeks. However, new cases of WNV illness may be diagnosed in the next few weeks due to the lag time from time of becoming infected with WNV and the development of illness. Current SYMVCD surveillance and treatment maps are posted online at the SYMVCD website.

The key to prevention of infection in humans with WNV is prevention of mosquito bites. It is very important to be vigilant and to take the simple precautions that reduce the risk of mosquito bites. The 6 “D”s is an easy way to remember how to prevent mosquito bites:

  • D – DEET – use DEET, picaridin, oil of lemon eucalyptus or IR3535. These are the EPA approved mosquito repellents to prevent bites; be sure to follow package instructions for age of person and how to apply
  • D – Dress to cover arms and legs
  • D – Dawn and Dusk – avoid going outdoors at dawn and dusk when the mosquitoes that carry WNV are most active
  • D – Doors and windows – make sure that the screens on your doors and windows are not broken or torn
  • D – Drain all standing water around the outside of your house to reduce numbers of mosquitoes around you – some common places are gutters, jar lids, tires, flower pot trays
  • D – District – let the Mosquito Control District know about any standing water, such as neglected swimming pools.

Most people who become infected with WNV will not develop any symptoms, but approximately one in five people who are infected with WNV will develop symptoms, such as fever, headaches, body aches, joint pain, vomiting, diarrhea or rash. Symptoms typically develop from 3 to 14 days after being bitten by an infected mosquito. Less than one percent of infected people will develop a serious neurologic illness such as encephalitis or meningitis (inflammation of the brain and surrounding tissues) and it can be fatal.

The State of California West Nile virus webpage has information about WNV activity around the state by county, how to report dead birds, and how to protect against WNV.

For more information about the work that the Sutter County Mosquito and Vector Control District is doing to reduce numbers of mosquitoes, go to


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