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25 Feb 2025, 01:30
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
73% (01:48) correct
27%
(02:14)
wrong
based on 184
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The malaria parasite can remain for up to forty days in the blood of an infected person. The disease cannot be passed from person to person, unless a non-infected person is exposed to the blood of an infected person. Theoretically, malaria could be eradicated in any given area, if all the mosquitoes carrying malaria in that area are exterminated. If such a course of action is carried out at a worldwide level, then the global eradication of malaria is possible.
Which of the following, if true, suggests that the epidemiologist’s plan for eliminating malaria is not viable?
A. A person who is infected with malaria can infect a mosquito that is not carrying malaria, if that mosquito bites such a person.
B. Unless a mosquito bites an infected person, and then bites a non-infected person, malaria cannot be passed directly from human to human.
C. Malaria is still endemic in many parts of the world, and many health workers believe that the global eradication of malaria is not possible.
D. Some people in areas where malaria is rife have developed an immunity to mosquitos, yet they are also show a higher incidence of genetic disorders such as sickle-cell anemia.
E. Mosquitos in many developing parts of the world are responsible for passing on a variety of viruses to human hosts.
Which of the following, if true, suggests that the epidemiologist’s plan for eliminating malaria is not viable?
A. A person who is infected with malaria can infect a mosquito that is not carrying malaria, if that mosquito bites such a person.
B. Unless a mosquito bites an infected person, and then bites a non-infected person, malaria cannot be passed directly from human to human.
C. Malaria is still endemic in many parts of the world, and many health workers believe that the global eradication of malaria is not possible.
D. Some people in areas where malaria is rife have developed an immunity to mosquitos, yet they are also show a higher incidence of genetic disorders such as sickle-cell anemia.
E. Mosquitos in many developing parts of the world are responsible for passing on a variety of viruses to human hosts.
25 Feb 2025, 04:47
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Premise or Background Information - Malaria parasites remain active for upto 40 days in the infected person's blood. Disease cannot be passed from person to person unless a non infected person is exposed to infected blood
Conclusion - if all infected mosquitos are exterminated globally malaria's global eradication is possible
Its a "weaken the argument" question.
A. A person who is infected with malaria can infect a mosquito that is not carrying malaria, if that mosquito bites such a person. - this highlights a serious concern in the plan. even after the eradication of the infected mosquitos the complete eradication of malaria is doubtful since the parasites remain active for upto 40 days in the blood stream of the infected person. so the plan should include a strategy for the both infected person and mosquito to successfully eradicate malaria . Correct
B. Unless a mosquito bites an infected person, and then bites a non-infected person, malaria cannot be passed directly from human to human. - this is already highlighted in the argument. its not adding any value to the plan. Incorrect
C. Malaria is still endemic in many parts of the world, and many health workers believe that the global eradication of malaria is not possible. - its not adding any value to the plan. Incorrect
D. Some people in areas where malaria is rife have developed an immunity to mosquitos, yet they are also show a higher incidence of genetic disorders such as sickle-cell anemia. - out of scope. Incorrect
E. Mosquitos in many developing parts of the world are responsible for passing on a variety of viruses to human hosts. - its not adding any value to the plan. Incorrect
Conclusion - if all infected mosquitos are exterminated globally malaria's global eradication is possible
Its a "weaken the argument" question.
A. A person who is infected with malaria can infect a mosquito that is not carrying malaria, if that mosquito bites such a person. - this highlights a serious concern in the plan. even after the eradication of the infected mosquitos the complete eradication of malaria is doubtful since the parasites remain active for upto 40 days in the blood stream of the infected person. so the plan should include a strategy for the both infected person and mosquito to successfully eradicate malaria . Correct
B. Unless a mosquito bites an infected person, and then bites a non-infected person, malaria cannot be passed directly from human to human. - this is already highlighted in the argument. its not adding any value to the plan. Incorrect
C. Malaria is still endemic in many parts of the world, and many health workers believe that the global eradication of malaria is not possible. - its not adding any value to the plan. Incorrect
D. Some people in areas where malaria is rife have developed an immunity to mosquitos, yet they are also show a higher incidence of genetic disorders such as sickle-cell anemia. - out of scope. Incorrect
E. Mosquitos in many developing parts of the world are responsible for passing on a variety of viruses to human hosts. - its not adding any value to the plan. Incorrect
Bunuel
25 Feb 2025, 08:54
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The epidemiologist’s plan relies on the idea that malaria can be eradicated by exterminating all mosquitoes carrying malaria. This assumes that once those mosquitoes are gone, malaria cannot spread any further.
The correct answer should challenge this assumption by showing that malaria can continue to spread even after malaria-carrying mosquitoes are exterminated.
Option Analysis:
(A) A person who is infected with malaria can infect a mosquito that is not carrying malaria, if that mosquito bites such a person.
- This directly undermines the plan. Even if malaria-carrying mosquitoes are eliminated, non-infected mosquitoes can become infected by biting an infected person, allowing the disease to persist.
- Correct answer.
(B) Unless a mosquito bites an infected person, and then bites a non-infected person, malaria cannot be passed directly from human to human.
- This restates part of the passage and does not challenge the plan.
- Incorrect.
(C) Malaria is still endemic in many parts of the world, and many health workers believe that the global eradication of malaria is not possible.
- This is an opinion rather than a reason that the plan is flawed.
- Incorrect.
(D) Some people in areas where malaria is rife have developed an immunity to mosquitoes, yet they also show a higher incidence of genetic disorders such as sickle-cell anemia.
- This is irrelevant to whether the malaria eradication plan would work.
- Incorrect.
(E) Mosquitoes in many developing parts of the world are responsible for passing on a variety of viruses to human hosts.
- This is about other diseases, not malaria.
- Incorrect.
Final Answer: (A)
The correct answer should challenge this assumption by showing that malaria can continue to spread even after malaria-carrying mosquitoes are exterminated.
Option Analysis:
(A) A person who is infected with malaria can infect a mosquito that is not carrying malaria, if that mosquito bites such a person.
- This directly undermines the plan. Even if malaria-carrying mosquitoes are eliminated, non-infected mosquitoes can become infected by biting an infected person, allowing the disease to persist.
- Correct answer.
(B) Unless a mosquito bites an infected person, and then bites a non-infected person, malaria cannot be passed directly from human to human.
- This restates part of the passage and does not challenge the plan.
- Incorrect.
(C) Malaria is still endemic in many parts of the world, and many health workers believe that the global eradication of malaria is not possible.
- This is an opinion rather than a reason that the plan is flawed.
- Incorrect.
(D) Some people in areas where malaria is rife have developed an immunity to mosquitoes, yet they also show a higher incidence of genetic disorders such as sickle-cell anemia.
- This is irrelevant to whether the malaria eradication plan would work.
- Incorrect.
(E) Mosquitoes in many developing parts of the world are responsible for passing on a variety of viruses to human hosts.
- This is about other diseases, not malaria.
- Incorrect.
Final Answer: (A)
