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Since the routine use of antibiotics can give rise to

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Since the routine use of antibiotics can give rise to [#permalink] New post 30 Nov 2010, 16:52
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. Since the routine use of antibiotics can give rise to resistant bacteria capable of surviving antibiotic environments, the presence of resistant bacteria in people could be due to the human use of prescription antibiotics. Some scientists, however, believe that most resistant bacteria in people derive from human consumption of bacterially infected meat.

Which of the following statements, if true, would most significantly strengthen the hypothesis of the scientists?
(A) Antibiotics are routinely included in livestock feed so that livestock producers can increase the rate of growth of their animals.
(B) Most people who develop food poisoning from bacterially infected meat are treated with prescription antibiotics.
(C) The incidence of resistant bacteria in people has tended to be much higher in urban areas than in rural areas where meat is of comparable quality.
(D) People who have never taken prescription antibiotics are those least likely to develop resistant bacteria.
(E) Livestock producers claim that resistant bacteria in animals cannot be transmitted to people through infected meat.


Can someone explain this question and how to tackle such a question...thanks.
[Reveal] Spoiler: OA

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Re: NEED SOME Help on this CR question [#permalink] New post 30 Nov 2010, 17:23
IMO , its A.
It gives a reason that because Antibiotics are present in the feed , it may lead to develop the resistant bacteria in the meat.
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Re: NEED SOME Help on this CR question [#permalink] New post 30 Nov 2010, 20:26
ajit257 wrote:
. Since the routine use of antibiotics can give rise to resistant bacteria capable of surviving antibiotic environments, the presence of resistant bacteria in people could be due to the human use of prescription antibiotics. Some scientists, however, believe that most resistant bacteria in people derive from human consumption of bacterially infected meat.

Which of the following statements, if true, would most significantly strengthen the hypothesis of the scientists?
(A) Antibiotics are routinely included in livestock feed so that livestock producers can increase the rate of growth of their animals.
-->Follows the logic of the statement prior to the scientists' statement. Increased use of antibiotics will increase the incidence of resistant bacteria in meat and will be introduced through the food chain.
(B) Most people who develop food poisoning from bacterially infected meat are treated with prescription antibiotics.
--->Tempting, but not the right logic, since this statement is speaking of something that occurs after the fact.
(C) The incidence of resistant bacteria in people has tended to be much higher in urban areas than in rural areas where meat is of comparable quality.
--->Way out of left field. Eliminate.
(D) People who have never taken prescription antibiotics are those least likely to develop resistant bacteria.
--->Weakens the argument.
(E) Livestock producers claim that resistant bacteria in animals cannot be transmitted to people through infected meat.
--->Weakens the argument.


Can someone explain this question and how to tackle such a question...thanks.
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Re: NEED SOME Help on this CR question [#permalink] New post 01 Dec 2010, 08:52
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ajit257 wrote:
. Since the routine use of antibiotics can give rise to resistant bacteria capable of surviving antibiotic environments, the presence of resistant bacteria in people could be due to the human use of prescription antibiotics. Some scientists, however, believe that most resistant bacteria in people derive from human consumption of bacterially infected meat.

Which of the following statements, if true, would most significantly strengthen the hypothesis of the scientists?
(A) Antibiotics are routinely included in livestock feed so that livestock producers can increase the rate of growth of their animals.
(B) Most people who develop food poisoning from bacterially infected meat are treated with prescription antibiotics.
(C) The incidence of resistant bacteria in people has tended to be much higher in urban areas than in rural areas where meat is of comparable quality.
(D) People who have never taken prescription antibiotics are those least likely to develop resistant bacteria.
(E) Livestock producers claim that resistant bacteria in animals cannot be transmitted to people through infected meat.


Can someone explain this question and how to tackle such a question...thanks.


Read the question stem first. It is a strengthen question. Read the stimulus with focus on scientists' hypothesis.
It is the following: most resistant bacteria in people derive from human consumption of bacterially infected meat.
The stimulus also tells us that routine use of antibiotics create resistant bacteria.
Option (A) - Antibiotics are routinely included in livestock feed so that livestock producers can increase the rate of growth of their animals.
If livestock get antibiotics, then the livestock that was bacterially infected in the first place, perhaps harbor resistant bacteria. If people ate that infected meat, it is quite possible that they will harbor resistant bacteria too. This would strengthen the hypothesis that resistant bacteria in people derive from consumption of infected meat.

(B) Most people who develop food poisoning from bacterially infected meat are treated with prescription antibiotics.
If people were prescribed antibiotics, they would develop resistant bacteria in their own bodies. So it doesn't strengthen the hypothesis that the resistant bacteria are transferred from consumption of meat.
(C) The incidence of resistant bacteria in people has tended to be much higher in urban areas than in rural areas where meat is of comparable quality.
Comparison of rural and urban areas is irrelevant.

(D) People who have never taken prescription antibiotics are those least likely to develop resistant bacteria.
It strengthens the other view "the presence of resistant bacteria in people could be due to the human use of prescription antibiotics." given in the stimulus, not the hypothesis of the scientists.

(E) Livestock producers claim that resistant bacteria in animals cannot be transmitted to people through infected meat.
The claim of producers holds no value. Even if it did, it would weaken the hypothesis of the scientists.
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Re: NEED SOME Help on this CR question [#permalink] New post 02 Dec 2010, 16:27
Karishma,
Great explanation ! thanks a tonne. :)
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Re: NEED SOME Help on this CR question [#permalink] New post 02 Dec 2010, 17:58
ajit257 wrote:
. Since the routine use of antibiotics can give rise to resistant bacteria capable of surviving antibiotic environments, the presence of resistant bacteria in people could be due to the human use of prescription antibiotics. Some scientists, however, believe that most resistant bacteria in people derive from human consumption of bacterially infected meat.

Which of the following statements, if true, would most significantly strengthen the hypothesis of the scientists?
(A) Antibiotics are routinely included in livestock feed so that livestock producers can increase the rate of growth of their animals.
-->Since antibiotics are fed to the livestock the animals may become resistant to the drugs. If humans eat the meat from these animals they too may become resistant. This strengthens the hypothesis.
(B) Most people who develop food poisoning from bacterially infected meat are treated with prescription antibiotics.
-->We are not talking about food poisoning and the treatment of it. Eliminate.
(C) The incidence of resistant bacteria in people has tended to be much higher in urban areas than in rural areas where meat is of comparable quality.
-->Out of the scope of the argument. We are looking for something to strengthen why scientists believe most resistant bacteria comes from the consumption of bacterially infected meat.
(D) People who have never taken prescription antibiotics are those least likely to develop resistant bacteria.
-->This may be true but not what we are looking for. Eliminate.
(E) Livestock producers claim that resistant bacteria in animals cannot be transmitted to people through infected meat.
-->This statement weakens the argument.


Can someone explain this question and how to tackle such a question...thanks.


I actually crossed them all out and had to go back and recheck to end up with A.
Conclusion: Scientist hypothesize that the most resistant bacteria come from the consumption of meat.
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I'm trying to not just answer the problem but to explain how I came up with my answer. If I am incorrect or you have a better method please PM me your thoughts. Thanks!

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Re: NEED SOME Help on this CR question [#permalink] New post 19 Dec 2010, 20:58
ajit257 wrote:
Karishma,
Great explanation ! thanks a tonne. :)




Tooo Good Explanation....thnkx...
Re: NEED SOME Help on this CR question   [#permalink] 19 Dec 2010, 20:58
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