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Malaria prevention bite avoidance — DTM&H MCQ

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ModerateMalariaMalaria prevention bite avoidanceDTM&H

A group of volunteers will sleep in rural clinics in Benin during the rainy season. Chemoprophylaxis is arranged, but several ask which non-drug intervention gives additional protection against night-biting vectors. What is the most appropriate prophylaxis?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: E — Insecticide-treated bed nets

Insecticide-treated bed nets is the single best answer because Anopheles mosquitoes often bite at night, so insecticide-treated bed nets reduce exposure and malaria transmission. Untreated daytime nets is plausible in a related presentation, but it is less appropriate because it does not fit the key discriminator in this vignette. The teaching point is that chemoprophylaxis complements but does not replace vector avoidance measures.

Reference: WHO Guidelines for malaria, 2025; UKHSA Malaria prevention guidelines for travellers from the UK, 2025; CDC Yellow Book 2026