BIOLOGY IN HUMAN WELFARE
HUMAN HEALTH AND DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Since the US is a developed nation there is a adequate access to healthcare to prevent the disease
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Most children in the US are vaccinated against malaria.
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The US does not typically have the genus of mosquito that carries the Plasmodium parasite.
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The US replaced DDT with another effective pesticide that keeps mosquito populations down.
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People in developed nations have adequate access to bug spray preventatives.
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Detailed explanation-1: -“Because DDT does not degrade, it remains intact in the environment for many years; therefore, human beings and the environment are exposed to its toxic effects, some of which may affect the development of children.
Detailed explanation-2: -The indoor residual spraying of DDT decreased the cases of malaria from 100 million a year in 1953 to 150, 000 by 1966; deaths due to malaria, which were nearly a million a year in the 1940s, decreased to about 1, 500 a year in 1966.
Detailed explanation-3: -DDT is used in IRS by spraying indoor surfaces with a coating of DDT. This residual coating prevents malaria transmission as a spatial repellent or contact irritant or by killing mosquitoes (indicating more than one mode of action), effectively preventing or interrupting transmission (Grieco et al.
Detailed explanation-4: -Mexico, the rest of Central America and parts of Africa have combated malaria without DDT by using alternative methods, such as controlling stagnant ponds where mosquitoes breed and using bed nets treated with pyrethroid insecticides.