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San Bernardino County mosquitoes test positive for West Nile virus

San Bernardino County mosquitoes tested positive for West Nile virus, prompting health officials to urge residents to clear standing water.

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Close-up of a mosquito feeding on human skin, a small red blood droplet at the bite site.

SAN BERNARDINO, Calif., July 6 (Inland Empire News Online) — San Bernardino County public health officials said residents should clear standing water and guard against mosquito bites after mosquitoes collected in the city of San Bernardino tested positive for West Nile virus.

The San Bernardino County Department of Public Health said the finding was the first positive mosquito collection in the county’s Mosquito and Vector Control Program service area in 2024.

West Nile virus is spread by infected mosquitoes and can make people and horses sick, according to the County of San Diego Department of Environmental Health’s Vector Control Program. That agency says the virus is monitored through mosquito trapping and testing, along with dead-bird surveillance.

San Bernardino County said its mosquito and vector control program is working to eliminate mosquito breeding hazards and urged residents to remove standing water around homes and take steps to protect themselves from mosquito bites.

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Sheyna Greenamyer

Sheyna Greenamyer is a senior California reporter for Times Media Service, based in Sacramento, California, covering health and religion. Greenamyer reports on health developments and on faith and religious life in communities across California, focusing on the people and issues behind the headlines. Greenamyer holds a master's degree in communications and grew up in Long Beach, California.

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