West Nile virus cycles primarily involve which hosts?

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Multiple Choice

West Nile virus cycles primarily involve which hosts?

Explanation:
West Nile virus is maintained in an animal–vector cycle that centers on birds and mosquitoes. Birds act as reservoir hosts, often developing high enough viremia to infect feeding mosquitoes. When a mosquito bites an infected bird, it acquires the virus and can then transmit it to other birds, continuing the cycle. Humans and horses can become infected via mosquito bites, but their viremia is usually too low to infect new mosquitoes, so they are dead-end hosts rather than part of the ongoing transmission cycle. Ticks and dogs are not involved in the primary maintenance cycle. Therefore, the principal hosts are birds and mosquitoes.

West Nile virus is maintained in an animal–vector cycle that centers on birds and mosquitoes. Birds act as reservoir hosts, often developing high enough viremia to infect feeding mosquitoes. When a mosquito bites an infected bird, it acquires the virus and can then transmit it to other birds, continuing the cycle. Humans and horses can become infected via mosquito bites, but their viremia is usually too low to infect new mosquitoes, so they are dead-end hosts rather than part of the ongoing transmission cycle. Ticks and dogs are not involved in the primary maintenance cycle. Therefore, the principal hosts are birds and mosquitoes.

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