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#Top150 CR: Epidemiologist: In Brazil, schistosomiasis and malaria are

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#Top150 CR: Epidemiologist: In Brazil, schistosomiasis and malaria are  [#permalink]

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New post 01 Dec 2015, 22:06
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Epidemiologist: In Brazil, schistosomiasis and malaria are the two most common infectious diseases. Over the past five years, schistosomiasis has been primarily responsible for the overall increase in infectious disease cases. Therefore it is likely that there were more cases of schistosomiasis than malaria five years ago.

Which of the following most strengthens the argument above?

A. Over the past five years, the percentage of infectious disease cases caused by schistosomiasis has remained unchanged, but the percentage of cases caused by malaria has increased substantially.

B. Trends in infectious disease data tend to persist for decades, unless there is a major breakthrough in treatment regimens.

C. Five years ago, many more people died from schistosomiasis than died from malaria.

D. Over the past five years, the percentage of infectious disease cases caused by malaria was not significantly greater than the percentage of cases caused by schistosomiasis.

E. Over the past five years, the percentage of infectious disease cases caused by diseases other than malaria and schistosomiasis did not increase substantially.

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#Top150 CR: Epidemiologist: In Brazil, schistosomiasis and malaria are  [#permalink]

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New post 02 Dec 2015, 03:43
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Epidemiologist: In Brazil, schistosomiasis and malaria are the two most common infectious diseases. Over the past five years, schistosomiasis has been primarily responsible for the overall increase in infectious disease cases. Therefore it is likely that there were more cases of schistosomiasis than malaria five years ago.

Which of the following most strengthens the argument above?

A. Over the past five years, the percentage of infectious disease cases caused by schistosomiasis has remained unchanged, but the percentage of cases caused by malaria has increased substantially.
CORRECT...lets look at the logic. even though the % of infectious disease cases caused by schistosomiasis(S) has remained unchanged and the percentage of cases caused by malaria(M) has increased substantially, still schistosomiasis(S) has been primarily responsible for the overall increase in infectious disease cases.....
[b]this can be only possible if the number of schistosomiasis are way more than malaria five years ago, as a small %increase of a large S will result in a greater number than a high % in a smaller M[/b]


B. Trends in infectious disease data tend to persist for decades, unless there is a major breakthrough in treatment regimens.
Out of scope- major breakthrough in treatment

C. Five years ago, many more people died from schistosomiasis than died from malaria.
the number of deaths may not necessarily give you more number of cases of that diseases....
It is possible that the cases of schistosomiasis were less but so severe that many of them were fatal.


D. Over the past five years, the percentage of infectious disease cases caused by malaria was not significantly greater than the percentage of cases caused by schistosomiasis.
doesn help much

E. Over the past five years, the percentage of infectious disease cases caused by diseases other than malaria and schistosomiasis did not increase substantially.
out of scope
A
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Re: #Top150 CR: Epidemiologist: In Brazil, schistosomiasis and malaria are  [#permalink]

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New post 02 Dec 2015, 02:05
Over the past 5 yrs, S has been the primary cause for increase in infectious disease cases --> More cases of S than M 5 years ago.

A. Over the past five years, the percentage of infectious disease cases caused by schistosomiasis has remained unchanged, but the percentage of cases caused by malaria has increased substantially. - Incorrect. Doesn't do anything to strengthen the conclusion.

B. Trends in infectious disease data tend to persist for decades, unless there is a major breakthrough in treatment regimens. - Incorrect. Out of scope.

C. Five years ago, many more people died from schistosomiasis than died from malaria. - Correct. Strengthens the argument by implying that S was more deadly than M 5 years ago.

D. Over the past five years, the percentage of infectious disease cases caused by malaria was not significantly greater than the percentage of cases caused by schistosomiasis. - Incorrect. Percentage of infectious disease cases caused by M was not significantly greater, but %M may be slightly greater than %S. Hence does not strengthen the argument.

E. Over the past five years, the percentage of infectious disease cases caused by diseases other than malaria and schistosomiasis did not increase substantially. - Incorrect. Out of context.

IMO, answer is C
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#Top150 CR: Epidemiologist: In Brazil, schistosomiasis and malaria are  [#permalink]

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New post 02 Dec 2015, 03:08
Epidemiologist: In Brazil, schistosomiasis and malaria are the two most common infectious diseases. Over the past five years, schistosomiasis has been primarily responsible for the overall increase in infectious disease cases. Therefore it is likely that there were more cases of schistosomiasis than malaria five years ago.

Which of the following most strengthens the argument above?

A. Over the past five years, the percentage of infectious disease cases caused by schistosomiasis has remained unchanged, but the percentage of cases caused by malaria has increased substantially.

Does not strengthen the argument...

B. Trends in infectious disease data tend to persist for decades, unless there is a major breakthrough in treatment regimens.Correct answer

C. Five years ago, many more people died from schistosomiasis than died from malaria.
Even though no of deaths from S is greater than no of deaths from M....
Does not necessarily mean it was more prevelant or more no of people were affected by M.

D. Over the past five years, the percentage of infectious disease cases caused by malaria was not significantly greater than the percentage of cases caused by schistosomiasis.
I think it weakens at most

E. Over the past five years, the percentage of infectious disease cases caused by diseases other than malaria and schistosomiasis did not increase substantially.
Out of scope
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Re: #Top150 CR: Epidemiologist: In Brazil, schistosomiasis and malaria are  [#permalink]

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New post 02 Dec 2015, 03:34
1
Vyshak wrote:
Over the past 5 yrs, S has been the primary cause for increase in infectious disease cases --> More cases of S than M 5 years ago.

A. Over the past five years, the percentage of infectious disease cases caused by schistosomiasis has remained unchanged, but the percentage of cases caused by malaria has increased substantially. - Incorrect. Doesn't do anything to strengthen the conclusion.

B. Trends in infectious disease data tend to persist for decades, unless there is a major breakthrough in treatment regimens. - Incorrect. Out of scope.

C. Five years ago, many more people died from schistosomiasis than died from malaria. - Correct. Strengthens the argument by implying that S was more deadly than M 5 years ago.

D. Over the past five years, the percentage of infectious disease cases caused by malaria was not significantly greater than the percentage of cases caused by schistosomiasis. - Incorrect. Percentage of infectious disease cases caused by M was not significantly greater, but %M may be slightly greater than %S. Hence does not strengthen the argument.

E. Over the past five years, the percentage of infectious disease cases caused by diseases other than malaria and schistosomiasis did not increase substantially. - Incorrect. Out of context.

IMO, answer is C


Hi,

the number of deaths may not necessarily give you more number of cases of that diseases....
It is possible that the cases of schistosomiasis were less but so severe that many of them were fatal...
so C may not be correct..
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1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html


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Re: #Top150 CR: Epidemiologist: In Brazil, schistosomiasis and malaria are  [#permalink]

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New post 02 Dec 2015, 03:36
akhil2709 wrote:
Epidemiologist: In Brazil, schistosomiasis and malaria are the two most common infectious diseases. Over the past five years, schistosomiasis has been primarily responsible for the overall increase in infectious disease cases. Therefore it is likely that there were more cases of schistosomiasis than malaria five years ago.

Which of the following most strengthens the argument above?

A. Over the past five years, the percentage of infectious disease cases caused by schistosomiasis has remained unchanged, but the percentage of cases caused by malaria has increased substantially.

Does not strengthen the argument...

B. Trends in infectious disease data tend to persist for decades, unless there is a major breakthrough in treatment regimens.Correct answer

C. Five years ago, many more people died from schistosomiasis than died from malaria.
Even though no of deaths from S is greater than no of deaths from M....
Does not necessarily mean it was more prevelant or more no of people were affected by M.

D. Over the past five years, the percentage of infectious disease cases caused by malaria was not significantly greater than the percentage of cases caused by schistosomiasis.
I think it weakens at most

E. Over the past five years, the percentage of infectious disease cases caused by diseases other than malaria and schistosomiasis did not increase substantially.
Out of scope


Hi,
I would say B would be out of scope as there is nothing told about major breakthrough, it could have occured or may not..
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1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html


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Re: #Top150 CR: Epidemiologist: In Brazil, schistosomiasis and malaria are  [#permalink]

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New post 02 Dec 2015, 03:53
1
chetan2u wrote:
Vyshak wrote:
Over the past 5 yrs, S has been the primary cause for increase in infectious disease cases --> More cases of S than M 5 years ago.

A. Over the past five years, the percentage of infectious disease cases caused by schistosomiasis has remained unchanged, but the percentage of cases caused by malaria has increased substantially. - Incorrect. Doesn't do anything to strengthen the conclusion.

B. Trends in infectious disease data tend to persist for decades, unless there is a major breakthrough in treatment regimens. - Incorrect. Out of scope.

C. Five years ago, many more people died from schistosomiasis than died from malaria. - Correct. Strengthens the argument by implying that S was more deadly than M 5 years ago.

D. Over the past five years, the percentage of infectious disease cases caused by malaria was not significantly greater than the percentage of cases caused by schistosomiasis. - Incorrect. Percentage of infectious disease cases caused by M was not significantly greater, but %M may be slightly greater than %S. Hence does not strengthen the argument.

E. Over the past five years, the percentage of infectious disease cases caused by diseases other than malaria and schistosomiasis did not increase substantially. - Incorrect. Out of context.

IMO, answer is C


Hi,

the number of deaths may not necessarily give you more number of cases of that diseases....
It is possible that the cases of schistosomiasis were less but so severe that many of them were fatal...
so C may not be correct..


Yes you are correct. I feel that A is the answer now.

"Over the past five years, schistosomiasis has been primarily responsible for the overall increase in infectious disease cases".
If "Over the past five years, the percentage of infectious disease cases caused by schistosomiasis has remained unchanged, but the percentage of cases caused by malaria has increased substantially" then it implies that more cases of schistosomiasis were registered 5 years ago.
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Re: #Top150 CR: Epidemiologist: In Brazil, schistosomiasis and malaria are  [#permalink]

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Re: #Top150 CR: Epidemiologist: In Brazil, schistosomiasis and malaria are &nbs [#permalink] 05 Apr 2018, 04:27
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