Dengue fever is transmitted to humans by
Correct answer: B. the bite of Aedes mosquitoes
- A. contaminated drinking water
- B. the bite of Aedes mosquitoes
- C. coughing and sneezing
- D. eating contaminated food
Explanation
Aedes aegypti and Aedes albopictus mosquitoes carry the dengue virus between people, which is why outbreaks follow the mosquito season and stagnant water. Water and food routes spread gut infections such as cholera, not dengue.
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About Viruses
Viruses are acellular infectious particles made of genetic material enclosed by a protein capsid, sometimes with a lipid envelope. Their replication depends on a host cell and may follow lytic or lysogenic cycles, so viral structure and reproduction differ fundamentally from those of cellular organisms such as bacteria.
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