Japanese encephalitis virus transmission in rural Asia is maintained in an enzootic cycle involving which mosquito vector and amplifier vertebrate host?
- A Aedes aegypti and humans
- B Anopheles gambiae and cattle
- C Culex tritaeniorhynchus and domestic pigs ✓
- D Culex pipiens and wading birds only
Correct answer: C. Culex tritaeniorhynchus and domestic pigs
Explanation
The enzootic cycle of Japanese encephalitis virus circulates between Culex mosquitoes, chiefly Culex tritaeniorhynchus breeding in rice paddies, and vertebrate amplifying hosts, principally domestic pigs and wading birds. Humans are dead-end hosts because viremia is low and brief, so they do not sustain transmission. Pigs develop high-titer viremia and their proximity to human dwellings drives epidemic risk.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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