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August 17.2025

2 Minutes Read

West Nile Virus Alert: Infected Birds Found in Contra Costa County

Another west nile virus-infected bird has been found

New Findings on West Nile Virus Raise Alarm in Contra Costa

As public health officials continue to monitor the spread of West Nile virus, the recent discovery of an American crow in Walnut Creek that tested positive for the virus signals growing concerns. This marks the second infected bird identified in Contra Costa County this season, prompting increased vigilance not just in the county but also across neighboring regions such as Alameda, Santa Clara, and Solano counties.

Understanding West Nile Virus Transmission

West Nile virus is primarily transmitted through the bite of an infected mosquito, which makes birds essential reservoirs for the disease. In many areas, the heat of summer accelerates the mosquito life cycle, increasing the risk of transmission to humans and animals. According to Steve Schutz, the district’s scientific program manager, the current hot weather patterns facilitate quicker development of mosquitoes, heightening the threat posed by this virus.

Public Health Recommendations to Control Mosquito Populations

In light of these developments, residents are urged to take proactive measures to minimize mosquito breeding grounds. The Contra Costa Mosquito and Vector Control District recommends that homeowners inspect their properties regularly, particularly for standing water—an ideal breeding ground for mosquitoes. By dumping out any standing water weekly, residents can significantly reduce the mosquito population in their area.

Recognizing the Symptoms of Infection

Awareness of the symptoms associated with West Nile virus is crucial. While many infected individuals may remain asymptomatic, serious infections can manifest as fever, severe headaches, a stiff neck, disorientation, or confusion. These symptoms should prompt immediate medical attention, especially for vulnerable populations such as the elderly or immunocompromised individuals.

How Residents Can Get Involved

County residents play an essential role in disease surveillance. The Contra Costa Mosquito and Vector Control District encourages residents to report dead birds, which may indicate localized outbreaks. Those who encounter deceased birds can report them by calling (877) WNV-BIRD (968-2473) or online.

For additional mosquito control services, residents can reach out to the district at (925) 685-9301 or via their website. As we navigate this heightened awareness of vector-borne diseases, collective action within the community becomes vital.

Wellness Weekly

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West Nile Virus Alert: Infected Birds Found in Contra Costa County

New Findings on West Nile Virus Raise Alarm in Contra Costa

Understanding West Nile Virus Transmission

Public Health Recommendations to Control Mosquito Populations

Recognizing the Symptoms of Infection

How Residents Can Get Involved

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