Mosquitoes Test Positive for West Nile Virus

July 3, 2025

Mosquitoes in the Rolando neighborhood of San Diego have tested positive for West Nile virus, marking the first such occurrence in the county since 2023, alongside four positive tests in dead birds this year. County environmental health officials are reminding residents to follow their "Prevent, Protect, Report" guidelines to reduce the risk of transmission, which includes eliminating standing water that allows mosquitoes to breed. While no human cases have been reported in San Diego County this year, West Nile virus remains a serious health concern as it can cause symptoms ranging from headache and fever to, in rare cases, severe illness or death.

Who is affected

Residents of San Diego County, particularly those in the Rolando neighborhood
People who may be exposed to mosquitoes carrying West Nile virus
Birds, which are the primary hosts of the virus
Four dead birds that tested positive this year

What action is being taken

County officials are conducting routine mosquito monitoring that detected the virus
Officials are actively promoting their "Prevent, Protect, Report" guidelines to residents
The County Vector Control Program is providing free mosquito fish to control mosquito breeding in backyard water sources
County agencies are maintaining a reporting system for increased mosquito activity and dead birds

Why it matters

West Nile virus can cause serious health issues including headache, fever, nausea, fatigue, skin rash, or swollen glands
In rare cases, the virus can lead to extreme illness or death
This is the first detection in mosquitoes in San Diego County since 2023
Proactive prevention measures can significantly reduce the risk of transmission to humans

What's next

No explicit next steps stated in the article

Read full article from source: The San Diego Voice & Viewpoint