Mosquito spraying employed in Murrita: West Nile virus found


MURRIETA, CA – West Nile virus confirmation will require pest eradication operations at about five acres of space within the city this week amid mosquitoes causing viruses in Murrita, according to vector control officials.

The Riverside County Department of Environmental Health has sprayed “ultra-low volume” pesticides in the area of ​​Kalvari Murrita Christian School between 5am and 7pm Wednesday.

Agency spokesman Brent Casey said a group of mosquitoes that were caught in a trap near the school, where the number of pests are growing, tested positive for West Nile.

He said the spray treatment is planned for an area north of Jackson Avenue, Monroe Avenue to the south, California Oaks Road to the east and Interstate 15 to the west.

Anti-mosquito spraying involves the use of chemicals approved by the US Environmental Protection Agency. Pesticides are emitted in the form of mist emitted from the machines behind pickup trucks.

Officials recommended that during operations, residents stay indoors and keep windows closed for at least 15 minutes after the trucks leave.

Two human West Nile virus infections have been documented in Riverside County so far this year.

Statewide, a total of 46 WNV infections have been reported, according to California’s Department of Public Health, their largest number in Northern California. There has been one death related to WNV in Los Angeles County.

Mosquitoes usually become carriers of the virus after feeding an infected bird and can then spread potentially fatal stresses to animals and humans. Those at greatest risk include seniors and individuals with compromised immune systems.

Symptoms may never materialize, but may include fever, headache, nausea, body aches, skin rashes and swollen lymph nodes.

WNV also affects horses. On Monday, a 5-year-old Fresian mare in San Joaquin County, displaying neurological signs, was confirmed positive for West Nile virus. According to the California Department of Food and Agriculture, the horse is alive and recovering.

This is the 11th confirmed case of equine WNV in California in 2020. Positive horses were located in the following counties: Amador (1); Discount (1); Glenn (1); Merge (1); Riverside (2); San Bernardino (1); San Joaquin (2); And Stanislas (2).

Seven of the uninfected horses had infections, and four horses had an unknown vaccine history. According to the CDFA, eight horses are currently alive, one horse died, and two died.

Vaccination and mosquito control reduce the risk of WNV infection in horses. The American Association of Equine Practitioners recommends annual WNV vaccination.

The mosquito season in Southern California is generally from May to October. To reduce exposure to mosquitoes carrying WNV, residents are urged to:

– Spend as little time as possible in the early morning or evening, when mosquitoes generally move;
– Wear pants and long-sleeved shirts during outdoor activity in mosquito prone places;
– Use insect repellent;
– Make sure the doors and window curtains are properly fitted to keep out bugs; And
– Get rid of standing water separate from water buckets for animals to drink, and proper treatment with chemicals in the pool.

Anyone should contact the Environmental Health Department at 951-766-9454.

City News Service and Patch Editor Tony McAlester contributed to this report.