Vector-borne diseases — A/L Biology

How do I practise Vector-borne diseases?

1 question with a worked solution

1. Which mosquito genus serves as the definitive biological host and primary transmission vector for human malaria caused by protozoan parasites of the genus Plasmodium?
   1. A) Female Aedes mosquito
   2. B) Mansonia mosquito
   3. C) Female Anopheles mosquito
   4. D) Female Culex mosquito
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   Correct answer: C) Female Anopheles mosquito

   Malaria is transmitted solely by female mosquitoes of the genus Anopheles (most notably Anopheles culicifacies in Sri Lanka). The sexual cycle (syngamy and sporogony) occurs within the mosquito gut, making the female Anopheles the definitive host.

   Show worked solution

   Step 1: Match vectors to human infectious diseases: - Aedes aegypti: Dengue, Chikungunya, Zika. - Culex quinquefasciatus: Lymphatic filariasis, Japanese encephalitis. - Mansonia: Brugian filariasis. - Anopheles: Malaria (Plasmodium vivax and Plasmodium falciparum). Answer: Female Anopheles mosquito.
   Modelled on: the A/L Biology examination pattern

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Where does Vector-borne diseases fit in the syllabus?

Year 2 · Term 3