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Lyme Disease

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SVP
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Lyme Disease [#permalink] New post 12 Aug 2006, 09:31
Lyme disease is caused by a bacterium transmitted to humans by deer ticks. Generally
deer ticks pick up the bacterium while in the larval stage from feeding on infected whitefooted
mice. However, certain other species on which the larvae feed do not harbor the
bacterium. Therefore, if the population of these other species were increased, the number
of ticks acquiring the bacterium? and hence the number of people contracting Lyme
disease—would likely decline.

Which of the following, if true, most strengthens the argument?

A. Ticks do not suffer any adverse consequences from carrying the bacterium that
causes Lyme disease in humans.
B. There are no known cases of a human’s contracting Lyme disease through contact
with white-footed mice.
C. A deer tick feeds only once while in the larval stage.
D. A single host animal can be the source of bacteria for many tick larvae.
E. None of the other species on which deer tick larvae feed harbor other bacteria that
ticks transmit to humans.
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 [#permalink] New post 12 Aug 2006, 19:39
Is it (E)
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 [#permalink] New post 12 Aug 2006, 21:01
seems like e. can anyone confirm this?
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 [#permalink] New post 12 Aug 2006, 22:57
E

This is the only choice that talks about the other species and directly eliminates the point that could have weaken the argument.
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 [#permalink] New post 12 Aug 2006, 23:59
I agree that (E) is the best choice, but isn`t "bacteria" a little too general. Doesn`t it require a certain stain of bacteria to cause Lyme disease?? :?

2:59
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 [#permalink] New post 13 Aug 2006, 22:29
My personal choice was E too.

But OA was C. Guess OA was wrong........

Thanks everyone.
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 [#permalink] New post 14 Aug 2006, 07:38
Baffling.. but i chose C as well. E seemed out of scope to me because
E says

None of the other species on which deer tick larvae feed harbor other bacteria that ticks transmit to humans.

We are concered with the bacteria that causes Lyme disease.

I chose C because if the larvae feed ONLY ONCE in their lifetime AND the population of the OTHER species is increased then the probability that the larvae will acquire the disease would be decreased substantially
  [#permalink] 14 Aug 2006, 07:38
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