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City Departments


Further Indication Of West Nile Virus Confirmed In San Joaquin County

Posted: Jul 20, 2011

(STOCKTON, CA) San Joaquin County Mosquito & Vector Control District (District) confirmed that a Western Scrub-Jay found in the Stockton area zip code 95204, has tested positive for West Nile virus (WNV). This is the first bird to test WNV positive in San Joaquin County for 2011. In addition, a mosquito sample tested positive for WNV in the same zip code, 95204. “West Nile virus is here to stay and is expected to amplify or spread each year as temperatures rise. The recent finds of WNV spreading to urban areas are a reminder that residents should make a habit of taking precautions against mosquito bites”, said Aaron Devencenzi, Public Information Officer of the District.

The District will continue to implement the California Mosquito-Borne Virus Surveillance and Response Plan to protect public health and welfare. Spray locations and times will normally be available 24 hours in advance. People can access spray information and spray schedules by calling the District at (209) 982-4675 or toll-free at 1-800-300-4675 during business hours from 7:00 a.m. to 12:00 p.m. and 12:30 p.m. to 3:30 p.m., Monday through Friday or by visiting the District’s website online at www.sjmosquito.org.

In response to increased adult mosquito populations and the detection of West Nile virus in several areas of San Joaquin County, the San Joaquin County Mosquito and Vector Control District (District) is preparing to conduct ground spraying for adult mosquito control. Ground spraying for adult mosquito control using MGK Pyrocide 7396 or Pyronyl 525 is scheduled for the morning of Friday, July 22, 2011, between 3:30 a.m. – 6:00 a.m. or the morning of Saturday, July 23, 2011 between 3:30 a.m. – 6:00 a.m.

  • Portion of Central Stockton > North to Calaveras River, > South to Harding Way > East to Pacific Ave., > West to Pershing Ave.

Additional rural spray areas can be found at the District’s website: http://sjmosquito.org/spraying-updates.htm

Spraying for adult mosquitoes is done near sunset or sunrise with trucks and airplanes when mosquitoes are most active. The District will be using sprayers that apply a very fine mist of material that kills adult mosquitoes on contact. Control operations are contingent upon favorable weather conditions and if canceled, will typically be rescheduled to the following morning or evening.

Residents and visitors of San Joaquin County can reduce their risk of WNV and other mosquito-transmitted diseases by taking these precautions:

  • Eliminate all sources of standing water on your property that can support mosquito breeding.
  • Apply insect repellent containing the active ingredient DEET or Picaridin when outdoors, according to label instructions.
  • Avoid spending time outside when mosquitoes are most active, at dawn and dusk, and especially for the first two hours after sunset.
  • When outdoors, wear long pants, long-sleeved shirts and other protective clothing.
  • Exclude mosquitoes from your home with tight fitting screens on doors and windows.
  • Contact your veterinarian for information on vaccinating equine against WNV.
  • Report significant mosquito infestations to San Joaquin County Mosquito & Vector Control District at (209) 982-4675, 1-800-300-4675, or www.sjmosquito.org.
  • Report dead birds and tree squirrels to 1-877-WNV-BIRD (1-877-968-2473) or www.westnile.ca.gov.

2011 update on West Nile virus activity for San Joaquin County: 1 dead bird, and 2 mosquito samples, have tested West Nile Virus positive.

To request District service, call (209) 982-4675, 1-800-300-4675 or visit the District website at www.sjmosquito.org

For more information about mosquito control and WNV:

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