The main route of human infection with West Nile virus is through the bite of an infected mosquito. Mosquitoes become infected when they feed on infected birds, which may circulate the virus in their blood for a few days. The virus eventually gets into the mosquito’s salivary glands. During later blood meals (when mosquitoes bite), the virus may be injected into humans and animals, where it can multiply and possibly cause illness.

Sampling devices useful for the collection of Culex and Aedes adults

Traps and Aspirators

• Frommer Updraft Gravid Trap Model 1719
• CDC Gravid Trap Model 1712
• Hamer Floating Emergence Trap for Catch Basins and Wells Model 619
• New Standard Miniature Light Trap Model 1012
• Improved Prokopack Aspirator Model 1419
• Modified CDC Backpack Aspirator Model 1412
• Mouth Aspirators Models 412 & 612

Additional Products and Accessories

• Photocell-Controlled CO₂ Release Option— for the New Miniature Light Trap

Background Web Links

Centers for Disease Control (CDC)

• CDC Division of Vector-Borne Infectious Diseases
• Arboviral Encephalitides
• Information on Arboviral Encephalitides
• West Nile Virus Homepage
• Frequently Asked Questions about West Nile.

US Geological Survey

• USGS West Nile Links
• West Nile Virus Maps from National Atlas (USGS)
• USGS Virus Maps

Additional Links

• The National Pesticide Telecommunications Network (NPTN) West Nile Resource Guide