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Old 08-25-2011
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Bacteria An organism causing sever pain, erythema, and crepitus

A 32-year-old woman presents with complaints of severe right leg pain. The pain started in her groin 12 hours prior and has since extended down to her knee. Physical examination shows a well demarcated region of blanching erythema from the right groin to the right knee with a few areas of subcutaneous crepitus. What is the likely causative organism?
A. Escherichia coli
B. Clostridia perfringens
C. Streptococcus pneumonia
D. Enterococcus
E. Streptococcus pyogenes
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  #2  
Old 08-25-2011
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C.perfringes .. due to crepitus ..
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Old 08-25-2011
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Default c perfringes

c perfringes causes gas gangrene

Quote:
Originally Posted by ricko335 View Post
A 32-year-old woman presents with complaints of severe right leg pain. The pain started in her groin 12 hours prior and has since extended down to her knee. Physical examination shows a well demarcated region of blanching erythema from the right groin to the right knee with a few areas of subcutaneous crepitus. What is the likely causative organism?
A. Escherichia coli
B. Clostridia perfringens
C. Streptococcus pneumonia
D. Enterococcus
E. Streptococcus pyogenes
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  #4  
Old 08-25-2011
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Could be strep pyogenes... as there is no h/o trauma.... and region of blanching erythema could be early signs of necrotizing fasciatis...
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Old 08-25-2011
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Gas gangrene. Clostridia
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Old 08-25-2011
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Quote:
Originally Posted by ricko335 View Post
A 32-year-old woman presents with complaints of severe right leg pain. The pain started in her groin 12 hours prior and has since extended down to her knee. Physical examination shows a well demarcated region of blanching erythema from the right groin to the right knee with a few areas of subcutaneous crepitus. What is the likely causative organism?
A. Escherichia coli
B. Clostridia perfringens
C. Streptococcus pneumonia
D. Enterococcus
E. Streptococcus pyogenes
B) clostridia
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Old 08-25-2011
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clostridia. perfringens
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Old 08-25-2011
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E. Strept. Pyogens - Seems like fascitis
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Old 08-26-2011
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i think its b
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Old 08-28-2011
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The correct answer is E.
Necrotizing fasciitis is frequently caused by mixed flora. The initiating organisms are most commonly S. pyogenes (Group A strep) with or without S. aureus. While E. coli and clostridia species are also frequently present. C. perfringens his most commonly implicated in gas gangrene. S. pneumoniae does not play a major role in the necrotizing fasciitis
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Old 08-30-2011
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Quote:
Originally Posted by ricko335 View Post
The correct answer is E.
Necrotizing fasciitis is frequently caused by mixed flora. The initiating organisms are most commonly S. pyogenes (Group A strep) with or without S. aureus. While E. coli and clostridia species are also frequently present. C. perfringens his most commonly implicated in gas gangrene. S. pneumoniae does not play a major role in the necrotizing fasciitis
Really?..
Ok, show me how Strep Pyogenes do gas. Let us know please.

So, the questions is bad built. It should say..."what is the most common INITIATIATING BUG between all these?". ..but not asking for the causative agent, otherwise it shouldnt mention "gas"/"crepitus" in the question.
Moreover,...fasceitis, where usually we see gas...is not spontaneus, ...the more of the cases is as a consequence of a previous wound.
Hope this guide the folks.

SO, there is no right answer since the question is not that good posted, since, of course, my point of view.
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Old 09-04-2011
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Quote:
Originally Posted by Chemole View Post
Really?..
Ok, show me how Strep Pyogenes do gas. Let us know please.

So, the questions is bad built. It should say..."what is the most common INITIATIATING BUG between all these?". ..but not asking for the causative agent, otherwise it shouldnt mention "gas"/"crepitus" in the question.
Moreover,...fasceitis, where usually we see gas...is not spontaneus, ...the more of the cases is as a consequence of a previous wound.
Hope this guide the folks.

SO, there is no right answer since the question is not that good posted, since, of course, my point of view.
FA2010, p.384.
Nec.fasciitis - s.pyogenes, crepitus from metane and CO2...
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  #13  
Old 09-04-2011
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Quote:
Originally Posted by jahn77 View Post
FA2010, p.384.
Nec.fasciitis - s.pyogenes, crepitus from metane and CO2...
Thanks.......
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