Question:
All of the following are factors responsible for the resurgence of malaria EXCEPT:
All of the following are factors responsible for the resurgence of malaria EXCEPT:
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Three options worsen transmission; one is a protective barrier method.
Updated On: Jun 24, 2026
- Drug resistance
- Use of bed nets
- Vector resistance
- Development of newer strains of the parasite
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The Correct Option is B
Solution and Explanation
Step 1: Resurgence of malaria refers to the re-emergence and rising incidence of malaria after a period of effective control.
Step 2: Drug resistance of Plasmodium (for example chloroquine-resistant P. falciparum) reduces the efficacy of treatment and is a genuine factor driving resurgence.
Step 3: Vector (mosquito) resistance to insecticides such as DDT allows the Anopheles population to persist and transmit infection, also promoting resurgence.
Step 4: Emergence of newer, more virulent or drug-resistant strains of the parasite likewise contributes to increased disease burden.
Step 5: The use of insecticide-treated bed nets is a control and PREVENTIVE measure. It physically blocks the human-vector contact and reduces transmission, so it lowers malaria incidence rather than causing resurgence.
Conclusion: Bed nets are protective, so they are the exception. The printed key (B) is medically correct.
Step 2: Drug resistance of Plasmodium (for example chloroquine-resistant P. falciparum) reduces the efficacy of treatment and is a genuine factor driving resurgence.
Step 3: Vector (mosquito) resistance to insecticides such as DDT allows the Anopheles population to persist and transmit infection, also promoting resurgence.
Step 4: Emergence of newer, more virulent or drug-resistant strains of the parasite likewise contributes to increased disease burden.
Step 5: The use of insecticide-treated bed nets is a control and PREVENTIVE measure. It physically blocks the human-vector contact and reduces transmission, so it lowers malaria incidence rather than causing resurgence.
Conclusion: Bed nets are protective, so they are the exception. The printed key (B) is medically correct.
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