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Old 07-20-2011
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Bacteria Salmonella Microbiologic Features!

A 29-year-old woman presents with diarrhea several hours after eating a chicken sandwich that she thinks may have been undercooked. Which of the following suggests Salmonella gastroenteritis?
A. Gram negative lactose fermenters that produce hydrogen sulfide
B. Comma-shaped organisms expressing oxidase
C. Gram positive obligate anaerobes
D. Gram negative rods producing Shiga-like toxin
E. Gram negative, motile, lactose nonfermenters
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Old 07-20-2011
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its E........
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Old 07-21-2011
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Its E, salmonella is NOT gram positive, NOT have shiga like toxin (this will be E coli), NOT a lactose fermenter (that are klebsellia and E coli). therefore the ans will be E
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Old 07-21-2011
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E. Gram -ve, motile (like salmon,lactose NONfermenters
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Old 07-21-2011
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E. Gram negative, motile, lactose nonfermenters

(salmon motile in ocean)
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Old 07-21-2011
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answer......E
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Correct Answer answer

The correct answer is E.
Salmonella are gram-negative, lactose nonfermenters who produce hydrogen sulfide (H2S) and possess flagellar motility.
Comma-shaped organisms causing diarrhea that produce oxidase are suggestive of either Vibrio spp. orCampylobacter spp. GNR producing Shiga-like toxin is enterohemorrhagic E. coli (O157:H7). Gram-positive obligate anaerobes that cause diarrhea are C. difficile.
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Old 07-21-2011
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hey i also think its E.
But i wnt to clear one doubt..that vibrio cholera is comma shaped and also oxidase positive..so what about option B??
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Old 07-21-2011
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Quote:
Originally Posted by struggle View Post
hey i also think its E.
But i wnt to clear one doubt..that vibrio cholera is comma shaped and also oxidase positive..so what about option B??
What about it ? explain urself please. =)
We got Another comma shape.. Campylobacter.
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