In the transmission cycle of West Nile virus, birds are important mainly because they serve as what?
Correct answer: A. Amplifying vertebrate hosts
- A. Amplifying vertebrate hosts
- B. Dead-end vertebrate hosts
- C. Biological mosquito vectors
- D. Environmental fungal reservoirs
Explanation
Birds develop sufficient viraemia to infect mosquitoes, so they act as amplifying vertebrate hosts. Humans and horses usually develop viraemia too low to infect new mosquitoes and are therefore considered dead-end hosts.
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About Veterinary Public Health and Zoonoses
Veterinary public health examines how animal health affects human health through zoonotic diseases, food safety, environmental sanitation and population disease control. Coverage includes rabies, brucellosis, tuberculosis, anthrax, avian influenza and parasitic infections, along with their reservoirs, routes of transmission, surveillance, vaccination, quarantine and prevention under the One Health approach.
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