Q29: Lofgren s disease has been observed frequently in : GMAT Critical Reasoning (CR)
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# Q29: Lofgren s disease has been observed frequently in

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Q29: Lofgren s disease has been observed frequently in [#permalink]

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14 Dec 2006, 16:35
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Q29:
Lofgrenâ€™s disease has been observed frequently in commercially raised cattle but very
rarely in chickens. Both cattle and chickens raised for meat are often fed the type of feed
that transmits the virus that causes the disease. Animals infected with the virus take more
than a year to develop symptoms of Lofgrenâ€™s disease, however, and chickens
commercially raised for meat, unlike cattle, are generally brought to market during their
first year of life.

Which of the following is most strongly supported by the information provided?

A. The virus that causes Lofgrenâ€™s disease cannot be transmitted to human beings by
chickens.

B. There is no way to determine whether a chicken is infected with the Lofgrenâ€™s
disease virus before the chicken shows symptoms of the disease.

C. A failure to observe Lofgrenâ€™s disease in commercial chicken populations is not
good evidence that chickens are immune to the virus that causes this disease.

D. An animal that has been infected with the virus that causes Lofgrenâ€™s disease but
that has not developed symptoms cannot transmit the disease to an uninfected
animal of the same species.

E. The feed that chickens and cattle are fed is probably not the only source of the
virus that causes Lofgrenâ€™s disease.
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14 Dec 2006, 16:51
I think B...

chickens dont develop symptoms, hence difficult to find.. and argument is saying it is rarely observed in chickens.. so there must be no way to find it..
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14 Dec 2006, 19:43
mm007 wrote:
I think B...

chickens dont develop symptoms, hence difficult to find.. and argument is saying it is rarely observed in chickens.. so there must be no way to find it..

I disagree. I think the answer is C.

B says that there is 'No Way to identify the disease'. But the passage says that the disease is rarely observed. This implies that the disease can be detected in some cases. So B is incorrect.
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14 Dec 2006, 21:06
it should be C.
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14 Dec 2006, 23:18
one more C
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15 Dec 2006, 00:31
mm007 wrote:
I think B...

chickens dont develop symptoms, hence difficult to find.. and argument is saying it is rarely observed in chickens.. so there must be no way to find it..

I disagree. I think the answer is C.

B says that there is 'No Way to identify the disease'. But the passage says that the disease is rarely observed. This implies that the disease can be detected in some cases. So B is incorrect.

Agree C ...
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15 Dec 2006, 00:57
I pick C.

Before the symptoms are shown, chickens will be made to meat. So tha absence of symptoms doesn't mean that chickens are immune to the disease.[/code]
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15 Dec 2006, 10:49
Picked C too
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16 Dec 2006, 16:00
C !
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16 Dec 2006, 16:00
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