O Levels Biology (5090)•5090/12/M/J/18

Explanation
Malaria vector control targets mosquitoes, not the parasite
Steps:
- Identify the malarial vector as the Anopheles mosquito, which transmits the Plasmodium parasite.
- Determine that reducing vector spread involves limiting mosquito breeding, population, or contact with humans.
- Evaluate each option: A, B, and C directly target mosquitoes; D targets the parasite.
- Select the option that does not affect the vector population or transmission.
Why D is correct:
- Antibiotics target bacteria, but malaria's Plasmodium is a protozoan parasite unaffected by them (per microbiology definitions of antimicrobial specificity).
Why the others are wrong:
- A removes mosquito breeding sites in stagnant water.
- B uses sterile insect technique to reduce mosquito reproduction.
- C prevents mosquito bites, blocking vector transmission.
Final answer: D
Topic: Disease
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