Which mosquito genus is most associated with Eastern Equine Encephalitis?

Which mosquito genus is most associated with Eastern Equine Encephalitis?

• A. Culiseta melanura
• B. Aedes aegypti
• C. Culex quinquefasciatus
• D. Anopheles quadrimaculatus

Answer: (A)

Eastern Equine Encephalitis virus is kept in nature mainly through an enzootic cycle in birds, especially in swampy habitats. The mosquito most closely tied to maintaining that bird-to-bird transmission in the eastern United States is Culiseta melanura. This species feeds primarily on birds and breeds in permanent swampy environments, which makes it the key vector sustaining the EEEV cycle in nature. Humans and horses typically become infected when other bridge vectors bite an infected bird and then bite a human or horse, but the primary association with the enzootic maintenance of the virus is with this mosquito. The other genera listed are linked to different diseases or do not play the central role in the EEE enzootic cycle—Aedes aegypti transmits dengue and Zika, Culex quinquefasciatus is a common vector for West Nile virus, and Anopheles quadrimaculatus is a malaria vector.

Eastern Equine Encephalitis virus is kept in nature mainly through an enzootic cycle in birds, especially in swampy habitats. The mosquito most closely tied to maintaining that bird-to-bird transmission in the eastern United States is Culiseta melanura. This species feeds primarily on birds and breeds in permanent swampy environments, which makes it the key vector sustaining the EEEV cycle in nature. Humans and horses typically become infected when other bridge vectors bite an infected bird and then bite a human or horse, but the primary association with the enzootic maintenance of the virus is with this mosquito. The other genera listed are linked to different diseases or do not play the central role in the EEE enzootic cycle—Aedes aegypti transmits dengue and Zika, Culex quinquefasciatus is a common vector for West Nile virus, and Anopheles quadrimaculatus is a malaria vector.