SAN DIEGO, CA – San Diego County health officials have confirmed that two dead crows have tested positive for West Nile virus, marking the earliest signs of the virus’s activity in the region this year.
Infection Locations Identified
The infected birds were discovered in the Rolando neighborhood in East County, as well as near Encanto and North Bay Terraces. This discovery comes just one week after the virus was first detected in a local mosquito sample.
County officials emphasized that there are currently no local human cases reported.
How the Virus Spreads
According to San Diego County health guidelines, West Nile virus mainly affects birds. However, mosquitoes become carriers after biting an infected bird and can subsequently pass the virus to humans through bites.
While many infected individuals show no symptoms, mild cases can cause:
- Fever and headaches
- Nausea and fatigue
- Skin rashes or swollen glands
In very rare instances, the virus can lead to severe neurological illness or death. Centers for Disease Control and Prevention (CDC) data shows the virus has caused over 3,300 deaths across the United States since 1999.
County Protection Guidelines
Because common backyard mosquitoes can also transmit other diseases like dengue and Zika, San Diego County officials are urging residents to take immediate preventative actions:
- Prevent Breeding: Dump out standing water from plant trays, buckets, and open containers. Residents can also obtain free mosquito-eating fish from the county.
- Protect Yourself: Wear long sleeves and pants during dawn and dusk, and use EPA-registered insect repellent.
- Report Activity: Residents are encouraged to report heavy mosquito populations or sightings of dead crows and ravens to County Vector Control.
