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# It is not known whether bovine spongiform encephalopathy

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

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26 Nov 2007, 16:34
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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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Director
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26 Nov 2007, 17:00
Is it B?

C, D, and E are the methods through which the disease can be eradicated, so eliminate them.

Between A and B, later says that the developed drug will be given to all the cattles that might have the disease. However, there is noway of finding out the cattles having this disease, so its possible that not all the infected cattles will get the drug.

Amar
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Re: CR: Disease of cattle [#permalink]

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26 Nov 2007, 17:27
eyunni wrote:
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

I think it is A.
as it says in the passage, it is impossible to say which one is infected at what level until it shows the symptoms, this leads to conclude that it cannot be eradicated by removing from the herd and destroying any diseased animal as soon as it shows the typical symptoms of advanced BSE as it might already have infected others in the developing stage or so.
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Re: CR: Disease of cattle [#permalink]

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26 Nov 2007, 20:22
eyunni wrote:
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

Id say A.

Everything else seems like it may beable to erradicate the disease.

A will def not work. b/c as is stated in the passage others may have the disease but don't show signs of it. So killing those cattle that have the symptoms will not alone erradicate the disease. All hypothetical situations.
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Re: CR: Disease of cattle [#permalink]

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26 Nov 2007, 20:58
eyunni wrote:
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

Going for A...all other are assumptions not mentioned...like developing vaccine, drug, test and areas where BSE doesnt exists.
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Re: CR: Disease of cattle [#permalink]

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26 Nov 2007, 22:14
I'll go for A. Eyunni, what;s the OA?

(A) removing from the herd and destroying any diseased animal as soon as it shows the typical symptoms of advanced BSE
This will erradicate only in symptomatic cattle, however, the disease will never be erradicated this way. Passage clearly states that there may be some cattle incubating the disease. Thus, that cattle will be spared until they show symptoms. By the time they show symptoms, they could spread the disease onto some other animals, and the cycle will continue.
Director
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27 Nov 2007, 07:16
yes. OA is A.
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Re: CR: Disease of cattle [#permalink]

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14 Nov 2008, 12:41
eyunni wrote:
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

The question asks to find a solution that will not work, based on the evidence presented A is the answer. All the other answer choices could eradicate the disease.
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Re: It is not known whether bovine spongiform encephalopathy [#permalink]

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18 Apr 2013, 02:21
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
Correct. Because we cannot identify an infected animal until it shows typical symptoms. Hence, if we wait until see the infected animal, it's too late.

(B) developing a drug that kills the agent that cause BSE, and then treating with that drug all cattle that might have the disease
Wrong. If a drug can kill agent that cause BSE, it can prevent the disease for sure.

(C) destroying all cattle in areas where BSE occurs and raising cattle only in areas to which BSE is known not to have spread
Wrong. if we destroy ALL castle in areas to which BSD occurs, 100% we can prevent 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
Wrong. the vaccine does help to prevent BSE disease.

(E) developing a diagnostic test that does identify any infected animal and destroying all animals found to be infected
Wrong. If the diagnostic test is helpful, we can identify infected animals and destroy them before the disease could be spread.

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

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04 Jul 2016, 04:44
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] 04 Jul 2016, 04:44
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