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The traditional treatment of strep infections has been a

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The traditional treatment of strep infections has been a  [#permalink]

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New post 27 Apr 2008, 11:51
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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.

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Re: The traditional treatment of strep infections has been a  [#permalink]

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New post 28 Apr 2008, 17:41
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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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New post 27 Apr 2008, 15:09
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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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Re: The traditional treatment of strep infections has been a  [#permalink]

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New post 30 Apr 2008, 12:23
RyanDe680 wrote:
How does E strengthen the argument though that the new antibiotic is more effective than penicillin or erythromycin with regard to reinfection?


The new antibiotic only needs 3 days to work. If people stop taking it after 3 days they shouldn't be reinfected.

They could be equally effective if used properly, but because more people stop after 3 days only the new antibiotic will be used properly and thus be more effective.
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New post 30 Aug 2008, 10:55
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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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New post 30 Aug 2008, 11:23
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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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New post 26 Oct 2010, 06:35
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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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Re: CR-need help  [#permalink]

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New post 29 Oct 2010, 09:10
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Great discussion here. Quick note:

As future MBA students, GMAT test takers tend to be too focused on costs. I can think of at least a few CR problems off the top of my head in which something related to "cost" is a trap answer. If you're going to choose an answer that relates to cost, I would really encourage you to spend a few extra seconds asking yourself whether the cost of the program or project really has anything to do with the argument itself.
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The traditional treatment of strep infections has been a  [#permalink]

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New post 22 Jun 2016, 13:01
Good one
The distinction in the question is about being CURED Vs. about FEELING BETTER
My answer is E

People "FEEL" better after three days hence they stop taking penicillin and Erythromycin (but they have not fully CURED. Remember peniillin and ertyomicin takes 7 days).

People when taking new antibiotic will again feel better after 3 days . The real difference is that they will actually be cured because new antibiotic works only in 3 days effectively curing the patient and also removing any chance of reinfection
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The traditional treatment of strep infections has been a  [#permalink]

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New post 13 Apr 2018, 21:35
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First, let's break up this argument into premises and conclusions.

Premises:
traditional strep treatment takes 7 days
many people stop taking their medication after three days and become infected again
A new antibiotic only takes three days to work

Conclusion : the new 3-day treatment will reduce reinfection rates as compared with the 7-day treatments.

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

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

C. The new antibiotic has been shown to be effective in eradicating bacterial infections other than strep. --- even if infection other then strep, it will be new infection not reinfection. out

D. Some physicians have already begun to prescribe the new antibiotic instead of penicillin or erythromycin for the treatment of some strep infections. --- good but not helping in explanation

In order to understand why (E) is the correct answer, let's take a moment to understand this argument. The problem with the 7-day antibiotics is that people stop taking them after three days, which means that they aren't completely effective.

In order to prevent reinfection, the 3-day course of antibiotics must be effective without the same issues as the 7-day course of antibiotics. The passage doesn't tell us why people stop taking the pills after three days, so we rely on logic to determine

I always like to predict some answers before looking at the choices. Why would people stop taking the pills? Well, it could be because the start to feel better after a few days, or because the pills are expensive and they don't want to buy 7-days worth of pills, or because they don't understand the doctor's instructions.

We need to strengthen the argument that the 3-day course of pills will prevent reinfection.

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


Let's think about this. If people feel fully recovered after just three days of taking the pill, then they are unlikely to continue to take the pill. This is one of the reasons that I predicted above. Once people feel better, they will stop taking the medicine.

So, if the patient takes the 7-day medication, feels better after three days, and stops taking the pills, then she will become re-infected. On the other hand, if the person takes the 3-day medication and starts feeling better after three days, then she will not be re-infected because the pills have already worked!

Since you feel better after three days with all of the pills, the 3-day pill will be more effective because it actually cures you in that time. That is why it supports the idea that the 3-day treatment will reduce re-infections.
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