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It is not known whether bovine spongiform encephalopathy

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It is not known whether bovine spongiform encephalopathy [#permalink]

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It is not known whether bovine spongiform encephalopathy (BSE), a disease of cattle invariably deadly to them, can be transmitted directly from one infected animal to another at all stages of the infection. If it can be, there is now a reservoir of infected cattle incubating the disease. There are no diagnostic tests to identify infected animals before the animals show overt symptoms. Therefore, if such direct transmission occurs, the disease cannot be eradicated by __________.

Which one of the following best completes the argument?

(A) removing from the herd and destroying any diseased animal as soon as it shows the typical symptoms of advanced BSE

(B) developing a drug that kills the agent that cause BSE, and then treating with that drug all cattle that might have the disease

(C) destroying all cattle in areas where BSE occurs and raising cattle only in areas to which BSE is known not to have spread

(D) developing a vaccine that confers lifelong immunity against BSE and giving it to all cattle, destroying in due course all those animals for which the vaccine protection came too late

(E) developing a diagnostic test that does identify any infected animal and destroying all animals found to be infected

Source: LSAT
[Reveal] Spoiler: OA

Last edited by broall on 28 Sep 2017, 22:01, edited 1 time in total.
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Re: It is not known whether bovine spongiform encephalopathy [#permalink]

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It is not known whether bovine spongiform encephalopathy (BSE), a disease of cattle invariably deadly to them, can be transmitted directly from one infected animal to another at all stages of the infection. If it can be, there is now a reservoir of infected cattle incubating the disease. There are no diagnostic tests to identify infected animals before the animals show overt symptoms. Therefore, if such direct transmission occurs, the disease cannot be eradicated by ____

Which one of the following best completes the argument?

(A) removing from the herd and destroying any diseased animal as soon as it shows the typical symptoms of advanced BSE

(B) developing a drug that kills the agent that cause BSE, and then treating with that drug all cattle that might have the disease

(C) destroying all cattle in areas where BSE occurs and raising cattle only in areas to which BSE is known not to have spread

(D) developing a vaccine that confers lifelong immunity against BSE and giving it to all cattle, destroying in due course all those animals for which the vaccine protection came too late

(E) developing a diagnostic test that does identify any infected animal and destroying all animals found to be infected
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Re: It is not known whether bovine spongiform encephalopathy [#permalink]

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New post 08 Apr 2015, 09:37
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A. seems to be the correct answer choice.
removing from the herd won't cure as the infection might already have spread to others before it became overtly visible

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Re: It is not known whether bovine spongiform encephalopathy [#permalink]

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New post 08 Apr 2015, 10:58
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A is my take.. All other are possible ones...

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Re: It is not known whether bovine spongiform encephalopathy [#permalink]

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New post 17 Dec 2010, 23:09
This can be treated as a conclusion question. The correct answer choice will give a conclusion derived from the argument.
The correct option should be A.

Analysis:

Premise / evidence:
1. It is not known whether BSE can be transmitted directly from one infected animal to another at all stages of the infection.
2. There is a probability, that there are a number of infected cattle.
3. There is no diagnostic tests to identify infected animals before the animals show symptoms
Therefore: There is little known about the disease and it is very difficult to identify also it might have already spread.

Conclusion:

Therefore, if such direct transmission occurs, the disease cannot be eradicated by ........

Paraphrase:

Early detection, removing the infected animals.

Options:

(A) removing from the herd and destroying any diseased animal as soon as it shows the typical symptoms of advanced BSE
Correct option. Is supported by the evidence given in the argument.

(B) developing a drug that kills the agent that cause BSE, and then treating with that drug all cattle that might have the disease

Drug might be created even it is not known which animal is infected. If new drug is given to all animals, it will be effective to cure those animals infected.

C) destroying all cattle in areas where BSE occurs and raising cattle only in areas to which BSE is known not to have spread

It is possible to eradicate the disease by destroying all the cattle and moving to a safer location. Also this idea is not related to evidence presented.

(D) developing a vaccine that confers lifelong immunity against BSE and giving it to all cattle, destroying in due course all those animals for which the vaccine protection came too late

Vaccine might be created even it is not known which animal is infected. Since uninfected animals will be immune the disease will be eradicated over time.

(E) developing a diagnostic test that does identify any infected animal and destroying all animals found to be infected

This is also a possible way to eradicate the disease. If the disease is identified and all the animals with the disease are isolated then the disease will be eradicated.

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Re: It is not known whether bovine spongiform encephalopathy [#permalink]

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New post 09 Apr 2015, 23:48
Hello from the GMAT Club VerbalBot!

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Re: It is not known whether bovine spongiform encephalopathy [#permalink]

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New post 26 Jun 2015, 06:03
Hi mikemcgarry can you help me with this question. Thank you!

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Re: It is not known whether bovine spongiform encephalopathy [#permalink]

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New post 21 Sep 2016, 18:17
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: It is not known whether bovine spongiform encephalopathy [#permalink]

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New post 23 Apr 2017, 14:17
thanks for the question... a good one requiring one to read it closely and also use the elimination technique.. i got this one wrong. but learnt the lesson..

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Re: It is not known whether bovine spongiform encephalopathy [#permalink]

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New post 06 Sep 2017, 00:49
aimkp wrote:
53. It is not known whether bovine spongiform encephalopathy (BSE), a disease of cattle invariably deadly to them, can be transmitted directly from one infected animal to another at all stages of the infection. If it can be, there is now a reservoir of infected cattle incubating the disease. There are no diagnostic tests to identify infected animals before the animals show overt symptoms. Therefore, if such direct transmission occurs, the disease cannot be eradicated by ____

Which one of the following best completes the argument?

(A) removing from the herd and destroying any diseased animal as soon as it shows the typical symptoms of advanced BSE

(B) developing a drug that kills the agent that cause BSE, and then treating with that drug all cattle that might have the disease

(C) destroying all cattle in areas where BSE occurs and raising cattle only in areas to which BSE is known not to have spread

(D) developing a vaccine that confers lifelong immunity against BSE and giving it to all cattle, destroying in due course all those animals for which the vaccine protection came too late

(E) developing a diagnostic test that does identify any infected animal and destroying all animals found to be infected


It is not known if disease is directly transmitted from one infected animal to another at all stages of infection.
No diagnostic tests are available to identify infected animals before the animals show overt symptoms.
So, disease cannot be eradicated by removing the animals which shows the symptoms.


(A) removing from the herd and destroying any diseased animal as soon as it shows the typical symptoms of advanced BSE
Yes this seems correct according to our logic.

(B) developing a drug that kills the agent that cause BSE, and then treating with that drug all cattle that might have the disease
If drug is developed to kill the agent that cause BSE, disease can be eradicated.

(C) destroying all cattle in areas where BSE occurs and raising cattle only in areas to which BSE is known not to have spread
Again destroying all cattle in the area where BSE occurs will eradicate the disease.

(D) developing a vaccine that confers lifelong immunity against BSE and giving it to all cattle, destroying in due course all those animals for which the vaccine protection came too late
similar to B & C

(E) developing a diagnostic test that does identify any infected animal and destroying all animals found to be infected
If diagnostic test is developed, it will help to identify the infected animal and hence the eradication of disease is possible.
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Re: It is not known whether bovine spongiform encephalopathy   [#permalink] 06 Sep 2017, 00:49
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