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  #1  
Old 07-13-2011
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Bacteria Oxidase-negative, Motile, Gram-negative Bacillus!

A 23-year-old man presents to the emergency department complaining of bloody diarrhea, abdominal pain, and fever. Laboratory tests of blood and stool show an oxidase-negative, motile, gram-negative bacillus that grows as clear colonies on MacConkey agar. When plated on Hektoen enteric agar the colonies appear light green with black centers.

Which of the following is the most likely causative organism?

a) E. Coli
b) P. Aeruginosa
c) Salmonella Species
d) Vibrio Cholera
e) Yersinia Enterocolitica
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Old 07-13-2011
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Clear colonies on MacConkey agar = E.coli out
Hektoen enteric agar the colonies appear light green with black centers = Salmonella

so, the answer is C)
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  #3  
Old 07-13-2011
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Correct Answer Correct answer is C.

Indeed, answer is C, salmonella! =)
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Old 07-13-2011
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C- salmonella species
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  #5  
Old 07-30-2011
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Default C

salmonella
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  #6  
Old 07-30-2011
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good question i got it wrong
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  #7  
Old 07-31-2011
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Warning! C

c) Salmonella Species
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  #8  
Old 07-31-2011
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yep salmonella
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Old 07-31-2011
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good question it is salmonella
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