Health Officials Step Up Vector Control After West Nile Virus Detected in Chatham County

SAVANNAH, Ga. — The Coastal Health District and Chatham County Mosquito Control have confirmed that mosquito samples collected in Chatham County tested positive for West Nile Virus (WNV). The findings represent the district’s first positive viral isolations in mosquitoes this summer, prompting municipal health authorities to step up mitigation efforts across the Savannah metropolitan area.

Escalating Targeted Vector Control

Chatham County Mosquito Control regularly traps and monitors local mosquito populations across its 438-square-mile coverage area to test for vector-borne pathogens. Following the confirmed detection, field technicians are directing localized adulticide treatments and larvicide applications in affected zones to reduce adult mosquito populations and disrupt breeding cycles.

County officials note that upcoming seasonal rainfall could rekindle mosquito activity—particularly Asian tiger mosquitoes, which can breed in volumes of standing water as small as a bottle cap.

Community Guidance: The “5Ds” of Mosquito Prevention

Because West Nile Virus is transmitted to humans through the bite of infected mosquitoes and no vaccine exists for humans, health officials emphasize that personal protection and source reduction are the primary lines of defense.

The Coastal Health District advises residents across Savannah and Chatham County to practice the 5Ds of Mosquito Bite Prevention:

  • Dusk / Dawn: Limit outdoor exposure during peak mosquito feeding hours at dusk and dawn.
  • Dress: Wear loose-fitting, light-colored, long-sleeved shirts and long pants when outdoors to minimize exposed skin.
  • DEET: Apply EPA-registered insect repellent containing DEET, Picaridin, or Oil of Lemon Eucalyptus to skin and clothing.
  • Drain: Routinely inspect properties and dump standing water from flowerpots, buckets, birdbaths, gutters, and tarps to eliminate breeding grounds.
  • Doors & Windows: Ensure window and door screens fit tightly and repair any rips or tears to prevent mosquitoes from entering homes.

Residents who wish to receive notifications regarding countywide aerial or ground spraying schedules can register through Chatham County’s public notification system.

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