In endemic regions West Nile virus cycles between:

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Prepare for the TEDA Emerging and Exotic Diseases of Animals Exam with our interactive quizzes. Challenge yourself with multiple choice questions and detailed explanations to enhance your learning and boost your confidence for the exam!

Multiple Choice

In endemic regions West Nile virus cycles between:

Explanation:
The central idea is that West Nile virus is maintained mainly in a bird–mosquito cycle. Birds act as reservoir hosts and develop enough level of virus in the blood to infect feeding mosquitoes. Once mosquitoes acquire the virus, they can transmit it to other birds during subsequent feeds, keeping the cycle going in nature. Humans and horses can become infected from mosquito bites, but they rarely contribute to onward transmission because their viremia is usually too low to infect new mosquitoes. Biting flies are not a key part of maintaining the cycle.

The central idea is that West Nile virus is maintained mainly in a bird–mosquito cycle. Birds act as reservoir hosts and develop enough level of virus in the blood to infect feeding mosquitoes. Once mosquitoes acquire the virus, they can transmit it to other birds during subsequent feeds, keeping the cycle going in nature. Humans and horses can become infected from mosquito bites, but they rarely contribute to onward transmission because their viremia is usually too low to infect new mosquitoes. Biting flies are not a key part of maintaining the cycle.

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