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Salmonella is a food-borne microorganism that can cause

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Manager
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Salmonella is a food-borne microorganism that can cause [#permalink] New post 13 May 2007, 12:55
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Salmonella is a food-borne microorganism that can cause intestinal illness. The illness is sometimes fatal, especially if not identified quickly and treated. Conventional Salmonella tests on food samples are slow and can miss unusual strains of the microorganism. A new test identifies the presence or absence of Salmonella by the one piece of genetic material common to all strains. Clearly, public health officials would be well advised to replace the previous Salmonella tests with the new test.

Which one of the following, if true, most substantially weakens the argument?

(A) The new test identifies genetic material from Salmonella organisms only and not from similar bacteria.
(B) The new test detects the presence of Salmonella at levels that are too low to pose a health to people.
(C) Salmonella is only one of a variety of food-borne microorganism that can cause intestinal illness.
(D) The new test has been made possible only recently by dramatic advances in biological science.
(E) Symptoms of Salmonella poisoning are often mistaken for those of other common intestinal illness.

please explain your answers.
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 [#permalink] New post 13 May 2007, 14:10
I'll go for E, in absence of a better choice. If symptoms are misleading, doctors may not even think of testing for salmolella. So it sdoes not matter which test is used.
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 [#permalink] New post 13 May 2007, 16:46
the arg is about tests

B weakens the arg
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 [#permalink] New post 13 May 2007, 21:48
I go with A
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 [#permalink] New post 14 May 2007, 00:57
we have to undermine the practical application of the new test.

C&E out.
D out of scope
A-whats what test is intended to do.

B- may lead to lot of food wastage as food ,which is prefectly edible will be rejected. .
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 [#permalink] New post 14 May 2007, 03:32
B
AO please
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 [#permalink] New post 14 May 2007, 03:57
also B
  [#permalink] 14 May 2007, 03:57
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