stumped by nbme question

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stumped by nbme question

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6 Posts

amitdoc2b
Forum Senior

Topics: 42
Posts: 97

08/11/06 - 04:40 PM

Can someone explain this to me:

Which of the following contaminants will be removed from a fluid passed thru 0.45mu filter?

A. Herpes Simplex Virus
B. HIV protease
C. Lipopolysaccharide
D. Mycoplasma hominis
E. Staphyloccoccus Aureus

Thanks..

mitty
Forum Guru

Topics: 52
Posts: 376

08/11/06 - 05:04 PM

my gut tell me to peak E.Mycoplasma and staph are the bacterias in the choice.And I know mycoplasma and chlamidia are the smallest bacterias.So I will chose E.
What is the answer?

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study_ing
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Topics: 180
Posts: 2,509

08/11/06 - 11:21 PM

i wud guess similarly. s aureus wud be a giant here

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Dragonfly
Forum Elite
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Topics: 27
Posts: 338

08/13/06 - 06:32 AM

.45u filters everthing except Wall-less bacteria :Mycoplasma, Clamydia
.2u filters most bacteria + spores

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twesting2173
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Topics: 7
Posts: 65

09/21/06 - 07:45 PM

what is the break down for viruses guys? do we need ot know what size filters will get them out? thanks.

young_doc
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Topics: 58
Posts: 737

09/21/06 - 08:21 PM

I think this is a simple conceptual question. I doubt we're expected to memorize numbers...but just be able to pick out the largest organism of the group.

Clearly bacteria are larger than virus.

And between Staph and Myco, well it would help to know that Myco & Chlam, like Mitty said, are characteristically small.

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