Health officials in Contra Costa County have confirmed the presence of the yellow fever mosquito (Aedes aegypti), a species known for its aggressive daytime biting and ability to transmit dangerous diseases like dengue fever and Zika virus. The mosquito, small and black with white stripes on its back and legs, typically bites around the legs and ankles, making it a significant public health concern.

According to the Contra Costa Mosquito and Vector Control District, the mosquito was first discovered in North Concord earlier this week, triggering door-to-door inspections and treatments in the surrounding area. The district is urging residents to report sightings of this invasive mosquito, which thrives in small, water-filled containers like plant saucers commonly found in urban and suburban backyards.

Steve Schutz, the district’s scientific programs director, emphasized the potential impact of these mosquitoes: "In areas with established populations, particularly in Southern and Central California, these mosquitoes have changed the quality of life."

How to Stay Safe:

1. Eliminate Standing Water: Dump any water-filled containers like plant saucers and birdbaths to prevent breeding sites in your yard.
2. Wear Long Sleeves and Pants: Protect yourself from bites, especially during the day when these mosquitoes are most active.
3. Use Insect Repellent: Apply an EPA-registered repellent to ward off mosquitoes when spending time outdoors.
4. Report Mosquito Sightings: Contact the Contra Costa Mosquito and Vector Control District at (925) 685-9301 or visit their website to report yellow fever mosquitoes and request mosquito services.

The discovery of the yellow fever mosquito comes shortly after mosquitoes in Martinez tested positive for West Nile virus, highlighting the growing threat of mosquito-borne diseases in the area. In July, a resident in East Contra Costa County died from West Nile virus, marking the first death from the virus in the county since 2006.

The district is working hard to control the yellow fever mosquito population but needs the public’s help. Stay informed, take preventive measures, and report any mosquito activity to protect yourself and your community from these dangerous pests.