The traditional treatment of strep infections has been a : GMAT Critical Reasoning (CR)
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# The traditional treatment of strep infections has been a

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27 Apr 2008, 10:51
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The traditional treatment of strep infections has been a seven-day course of antibiotics, either penicillin or erythromycin. However, since many patients stop taking those drugs within three days, reinfection is common in cases where those drugs are prescribed. A new antibiotic requires only a three-day course of treatment. Therefore, reinfection will probably be less common in cases where the new antibiotic is prescribed than in cases where either penicillin or erythromycin is prescribed.

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

A. Some of the people who are allergic to penicillin are likely to be allergic to the new antibiotic.

B. A course of treatment with the new antibiotic costs about the same as a course of treatment with either penicillin or erythromycin.

C. The new antibiotic has been shown to be effective in eradicating bacterial infections other than strep.

D. Some physicians have already begun to prescribe the new antibiotic instead of penicillin or erythromycin for the treatment of some strep infections.

E. Regardless of whether they take a traditional antibiotic or the new one, most patients feel fully recovered after taking the drug for three days.
[Reveal] Spoiler: OA

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26 Oct 2010, 05:35
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What we need here is something that ensures that patients will not stop taking the new medicines before 3 days are over. Lets analyze the statements now:

(A) Some of the people who are allergic to penicillin are likely to be allergic to the new antibiotic.
This means that they will either stop taking the new medicine ahead of time or that it will not be effective for them. This actually weakens the argument.
(B) A course of treatment with the new antibiotic costs about the same as a course of treatment with either penicillin or erythromycin.
First of all, cost is out of scope. Even otherwise, people might have wanted to complete the course with new medicine if it was cheper, but since it is not there is no reason for them to. This neither strengthens nor weakens the argument.
(C) The new antibiotic has been shown to be effective in eradicating bacterial infections other than strep.
This is out of scope, but lets not rule it out for a moment.
(D) Some physicians have already begun to prescribe the new antibiotic instead of penicillin or erythromycin for the treatment of some strep infections.
Thank the physicians but they haven't done anything to strengthen our argument. They can prescribe the new medicine all they want but people may still not complete the dosage and get infected again. Silly people!!!
(E) Regardless of whether they take a traditional antibiotic or the new one, most patients feel fully recovered after taking the drug for three days.
This is our man. What it tells us is that, with old medicines, patients started feeling better in 3 days and hence stopped taking the dosage. With the new medicine too they would start feeling better only after 3 days; but by that time the new medicine would have done its job and hence no re-infection.

PS: Lets rule out C now
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28 Apr 2008, 16:41
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E. People stop taking their antibiotic because they feel better. The problem with the traditional 7-day cycle is that people feel better sooner than they are fully cured. The wider the gap between feeling better than actually being better the larger the chances of reinfection. With the new 3-day antibiotic, theoretically, feel better time = actual cure time, narrowing the before mentioned gap and reducing reinfection.

C doesn't make sense to me. The passage is talking about strep, so the discussion about other kinds of bacterial infection is irrelevant.
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30 Aug 2008, 10:23
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Ans choice E has a subtle nuance.

Patients feel fully recovered after 3 days with either drug. That is different from patients stopping taking the drug after 3 days. In essence E explains why they are stopping the drug after 3 days. They feel full recovered where as the course is 7 day. In the case of new drug, they not only feel fully recovered, but also the course is only 3 day.

Makes sense?
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27 Apr 2008, 14:09
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E, since both drug will make patients feel fully recovered after 3 days, it's safe to assume they will stop taking them after 3 days.
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28 Apr 2008, 21:18
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sondenso wrote:
At the same time, It seems that E weakens the premise:
prasannar wrote:
reinfection is common in cases where those drugs are prescribed

Wait to see a thorough explaination!

prasannar wrote:
The traditional treatment of strep infections has been a seven-day course of antibiotics,
either penicillin or erythromycin. However, since many patients stop taking those drugs
within three days, reinfection is common in cases where those drugs are prescribed
. A
new antibiotic requires only a three-day course of treatment. Therefore, reinfection will
probably be less common in cases where the new antibiotic is prescribed than in cases
where either penicillin or erythromycin is prescribed.

prasannar wrote:
E. Regardless of whether they take a traditional antibiotic or the new one, most
patients feel fully recovered after taking the drug for three days.

The passage is inferring that reinfection has more to do with patient's discontinuing the 7-day course after 3 days than it does with the penicillin or erythromycin itself. The reason patient's stop taking these drugs early is because they feel fully recovered after 3 days, 4 days earlier than it takes for the antibiotic to eradicate the infection. However, the new antibiotic only takes 3 days to fight off the infection, so reinfection isn't as likely with the new drug.

The way I see it, the larger the "gap" between how long it takes for the drug in question to fight off the infection and the time it takes before people stop taking the drug the more likely the chances for reinfection.

Hope that makes sense!
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30 Aug 2008, 09:55
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IMO: E

Main issue is: People seem to stop taking the antibotics after 3 days. So a drug has to be effective in 3 days.

A. Some of the people who are allergic to penicillin are likely to be allergic to the
new antibiotic.
>> Out of scope. Eliminate.

B. A course of treatment with the new antibiotic costs about the same as a course of
treatment with either penicillin or erythromycin.
>> Irrelevant. Does not explain why people stop taking antibiotics after 3 days. Eliminate. (Note that if you were using the 2 of 5 rule, this would be one of the 2 remaining options)

C. The new antibiotic has been shown to be effective in eradicating bacterial
infections other than strep.
>> Out of scope. Eliminate.

D. Some physicians have already begun to prescribe the new antibiotic instead of
penicillin or erythromycin for the treatment of some strep infections.
>> Irrelevant. Eliminate.

E. Regardless of whether they take a traditional antibiotic or the new one, most
patients feel fully recovered after taking the drug for three days.
>> Correct choice.
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30 Aug 2008, 09:59
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spriya,

It possibly suggests another plus point of the drug. But the cost effectiveness of the solution is not what we are concerned with here.

We are concerned with reinfection as the conclusion says. Looking at E, if people take old and new drugs for the same period of time, the reinfection will be less for those who take the new drug
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30 Aug 2008, 10:21
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spriya,

There is a subtle difference. The answer choice does not repeat the argument.

Argument says: New drug is effective after 3 days vs the old one which is effective after 7.

Answer choice says: People feel better after 3 days, irrespective of which drug they take. -- Possibly the reason why they stop taking the drug after 3 days (which statement, by the way, is in the argument).

I know, GMAT can drive you nuts on these kind of subtle differences.

Perhaps looking at it this way will help:
We dont want reinfection. The prescribed drug has to be effective to avoid reinfection. People stop taking drugs after 3 days. The new drug is effective in 3 days.

E re-inforces (strengthens) the argument portion: "People stop taking drugs after 4 days" --- because they feel better after 3 days. Now, since we dont want reinfection, the new drug is a better alternative (which is the conclusion of the argument).

I hope this helps and that I have not confused you further.
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22 Apr 2014, 02:08
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Option E.
If the patients will feel okay only AFTER THREE DAYS,then they won't stop taking the new drug BEFORE 3 DAYS.And the new drug just takes 3 days to cure the infection.Hence the argument that the new antibiotic drug will be more effective is strengthened as THERE WILL BE NO REINFECTIONS AS COMPARED TO THE ALTERNATIVE TRRATMENT.

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27 Apr 2008, 10:54
ick .... i will say C ... almost went for E though
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27 Apr 2008, 11:00
C.
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27 Apr 2008, 11:11
I think it's E.
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27 Apr 2008, 22:40
I think its E. Will explain further if correct.
prasannar wrote:
The traditional treatment of strep infections has been a seven-day course of antibiotics,
either penicillin or erythromycin. However, since many patients stop taking those drugs
within three days, reinfection is common in cases where those drugs are prescribed. A
new antibiotic requires only a three-day course of treatment. Therefore, reinfection will
probably be less common in cases where the new antibiotic is prescribed than in cases
where either penicillin or erythromycin is prescribed.

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

A. Some of the people who are allergic to penicillin are likely to be allergic to the
new antibiotic.

B. A course of treatment with the new antibiotic costs about the same as a course of
treatment with either penicillin or erythromycin.

C. The new antibiotic has been shown to be effective in eradicating bacterial
infections other than strep.

D. Some physicians have already begun to prescribe the new antibiotic instead of
penicillin or erythromycin for the treatment of some strep infections.

E. Regardless of whether they take a traditional antibiotic or the new one, most
patients feel fully recovered after taking the drug for three days.
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28 Apr 2008, 05:27
The conclusion here is "reinfection will probably be less common in cases where the new antibiotic is prescribed than in cases
where either penicillin or erythromycin is prescribed" ,Any correct answer will support the premises supporting conclusion or conclusion itself.

The underlying assumption is reinfection occurs due to the bacterias(That causes infection or other bacterias that can support infection causing bacterias) that are not removed due to insufficient course times .C proves that new antibiotic will kill other bacteris as well .

I feel E is out of scope for above argument due to the fact that argument is about occurance of reinfection and not about patients feeling.
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28 Apr 2008, 06:08
prasannar wrote:
The traditional treatment of strep infections has been a seven-day course of antibiotics,
either penicillin or erythromycin. However, since many patients stop taking those drugs
within three days, reinfection is common in cases where those drugs are prescribed. A
new antibiotic requires only a three-day course of treatment. Therefore, reinfection will
probably be less common in cases where the new antibiotic is prescribed than in cases
where either penicillin or erythromycin is prescribed.

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

A. Some of the people who are allergic to penicillin are likely to be allergic to the
new antibiotic.

B. A course of treatment with the new antibiotic costs about the same as a course of
treatment with either penicillin or erythromycin.

C. The new antibiotic has been shown to be effective in eradicating bacterial
infections other than strep.

D. Some physicians have already begun to prescribe the new antibiotic instead of
penicillin or erythromycin for the treatment of some strep infections.

E. Regardless of whether they take a traditional antibiotic or the new one, most
patients feel fully recovered after taking the drug for three days.

Go for E
C is actually irrelevant. Even if the new antibiotic is effective, there won't be less reinfections if people don't take the antibiotics.
Close call with B for me. We have to ask ourselves "why did the people stop taking the medicine?" It is most likely because they felt ok. This means that if most feel ok after three days with the new antibiotic, then there will be less reinfections with new antibiotics.
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28 Apr 2008, 08:47
What is the OA here?

I am between E and C but I think I'll pick C.
E doesn't say anything the probability of reinfection.
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28 Apr 2008, 20:45
Very confused

I am sensitive with C b/c

prasannar wrote:
C. The new antibiotic has been shown to be effective in eradicating bacterial
infections other than strep.

At the same time, It seems that E weakens the premise:
prasannar wrote:
reinfection is common in cases where those drugs are prescribed

Wait to see a thorough explaination!
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28 Apr 2008, 22:35
I'll pick E as my answer choice.
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29 Apr 2008, 02:13
i am with E....Whats the Answer?
Re: The traditional treatment of strep infections has been a   [#permalink] 29 Apr 2008, 02:13

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