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  #1  
Old 09-20-2012
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Default Osteomyelitis after street fight

A 30-year-old man develops osteomyelitis following a clenched-fist injury he sustained in a street fight. Culture of bone aspirate yields colonies that cause greenish discoloration on blood agar. Which of the following is the most likely causative organism?

a) Candida albicans
b)
Haemophilus influenzae
c)
Neisseria meningitidis
d)
Streptococcus pyogenes
e)
Streptococcus salivarius
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Old 09-20-2012
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my answer E) streptococcus salivarius--------

green colonies on blood agar indicate alpha hemolysis-------strep pyogenes is beta hemolysis

neisseria is partially alpha hemolytic but i'm not sure

and abt candida, and hemophilus----i don't think they are hemolytic
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Old 09-20-2012
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i ll go wid e
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Old 09-20-2012
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Default Neisseria meningitis

Quote:
Originally Posted by Casandra View Post
A 30-year-old man develops osteomyelitis following a clenched-fist injury he sustained in a street fight. Culture of bone aspirate yields colonies that cause greenish discoloration on blood agar. Which of the following is the most likely causative organism?

a) Candida albicans
b)
Haemophilus influenzae
c)
Neisseria meningitidis
d)
Streptococcus pyogenes
e)
Streptococcus salivarius
Hahaha..See thats why i was talking about. Read lot of causes of osteomyelitis but just haven't studied this.
So my Guessing machine on again-
Green discoloration on blood agar. So its alpha hemolysis which is caused by H2O2 producing bacteria who changes hemoglobin to methhemoglobin (green colored).
So now have to think about H2O2 producing bacteria

but still don't know the answer and will go with N. meningitis
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One day i will infect these microbes and they will search for "Anti-MEbiotic"....
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Old 09-20-2012
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Default my answer E

My asnwer E... cause s. salivarius is alpha hemolytic and that explain the greenish colored,, in the context of the question ---street fight--- that implicates trauma injuries in the mouth producing infection by bacterial flora in the mouth..... Neisseria s.p is found in -->pharyngeal flora<-- ... N. meningitidis is spread through saliva and respiratory secretions and is n. meningitidis alpha hemolytic???
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Old 09-20-2012
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y not H. Influ?
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Old 09-20-2012
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Default ...E

I will go with E!
When first read this question I thought of Eikenella corrodens
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Old 09-20-2012
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E.....well...unless they kissed and made-up after the fight (C).
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Old 09-20-2012
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Quote:
Originally Posted by checcles View Post
E.....well...unless they kissed and made-up after the fight (C).
hahaha Maybe the kiss sparked the fight
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