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Since 1975 there has been in the United States a dramatic [#permalink]
 23 Apr 2007, 14:41
Question Stats:
50% (02:06) correct
50% (00:02) wrong based on 0 sessions
Since 1975 there has been in the United States a dramatic decline in the incidence of traditional childhood diseases such as measles. This decline has been accompanied by an increased incidence of PetersonтАЩs disease, a hitherto rare viral infection, among children. Few adults, however, have been affected by the disease.
Which of the following, if true, would best help to explain the increased incidence of PetersonтАЩs disease among children?
(A) Hereditary factors determine in part the degree to which a person is susceptible to the virus that causes PetersonтАЩs disease.
(B) The decrease in traditional childhood diseases and the accompanying increase in PetersonтАЩs disease have not been found in any other country.
(C) Children who contract measles develop immunity to the virus that causes PetersonтАЩs disease.
(D) Persons who did not contract measles in childhood might contract measles in adulthood, in which case the consequences of the disease would generally be more severe.
(E) Those who have contracted PetersonтАЩs disease are at increased risk of contracting chicken pox.
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Re: CR - Peterson's disease [#permalink]
23 Apr 2007, 16:24
VAGMAT wrote: Since 1975 there has been in the United States a dramatic decline in the incidence of traditional childhood diseases such as measles. This decline has been accompanied by an increased incidence of PetersonтАЩs disease, a hitherto rare viral infection, among children. Few adults, however, have been affected by the disease.
Which of the following, if true, would best help to explain the increased incidence of PetersonтАЩs disease among children?
(A) Hereditary factors determine in part the degree to which a person is susceptible to the virus that causes PetersonтАЩs disease.
Hereditary factors have neither been touched upon nor implied anywhere in the passage. This can't help explain the increased incidence of P disease.
(B) The decrease in traditional childhood diseases and the accompanying increase in PetersonтАЩs disease have not been found in any other country.
Out of scope - We're not comparing the incidence of the phenomenon described in the passage across different countries.
(C) Children who contract measles develop immunity to the virus that causes PetersonтАЩs disease.
Right. If Measles then No Peterson's. No Measles ---> Vulnerability to
Peterson's. Helps explains the increased incidence of Petersons in non
measle-infected children
(D) Persons who did not contract measles in childhood might contract measles in adulthood, in which case the consequences of the disease would generally be more severe.
Out of scope/irrelevant/couldn't care less-types
(E) Those who have contracted PetersonтАЩs disease are at increased risk of contracting chicken pox.
Same as D.
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C. Previously when more children contract measles, Peterson's disease immunity was developed as a result. With the decline in the number of children contracting measles, we would therefore see a similar increase in children contracting peterson's disease because that natural immunity is no longer present.
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C, it is.. simple
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(C)
Other options are so lame and so poorly written that this question is a no brainer 
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Easy C 
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It is C.
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The answer is C! Glad to see that some of you think this one was easy, I had a hard time with the answer. Thanks!
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I C that it's C
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Re: CR - Peterson's disease [#permalink]
16 May 2010, 13:14
As per C: Measles->No Peterson's. Since 1975: No Meales. This does not imply Peterson's!!! So you see my point? Thanks,
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Re: CR - Peterson's disease
[#permalink]
16 May 2010, 13:14
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