Question:easy
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:
Show Hint
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
Show Solution
The Correct Option is B
Solution and Explanation
The question asks which option does NOT explain why malaria comes back after control efforts.
Think of the three main drivers of malaria resurgence as the parasite, the drug, and the mosquito. First, the parasite can change: new strains that are hardier or harder to treat increase transmission. Second, the drug can fail: when $Plasmodium$ becomes resistant to chloroquine and other agents, treated patients stay infectious and the disease spreads again. Third, the mosquito can survive: $Anopheles$ vectors that develop resistance to insecticides keep biting and keep transmitting, so case numbers climb.
Now contrast these with insecticide-treated bed nets. A bed net is a barrier intervention. It stops the mosquito from feeding on a sleeping person and kills mosquitoes that land on the treated fabric. Far from causing resurgence, it is one of the most effective tools for reducing malaria. Therefore it cannot be a cause of resurgence and is the odd one out.
Hence the correct answer is the use of bed nets.
\[\boxed{\text{Use of bed nets}}\]
Think of the three main drivers of malaria resurgence as the parasite, the drug, and the mosquito. First, the parasite can change: new strains that are hardier or harder to treat increase transmission. Second, the drug can fail: when $Plasmodium$ becomes resistant to chloroquine and other agents, treated patients stay infectious and the disease spreads again. Third, the mosquito can survive: $Anopheles$ vectors that develop resistance to insecticides keep biting and keep transmitting, so case numbers climb.
Now contrast these with insecticide-treated bed nets. A bed net is a barrier intervention. It stops the mosquito from feeding on a sleeping person and kills mosquitoes that land on the treated fabric. Far from causing resurgence, it is one of the most effective tools for reducing malaria. Therefore it cannot be a cause of resurgence and is the odd one out.
Hence the correct answer is the use of bed nets.
\[\boxed{\text{Use of bed nets}}\]
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