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  #1  
Old 05-25-2010
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Default Which bacteria is causing this lung lesion?

A 45-year-old white male with a history of alcohol abuse and periodontal disease is brought to the emergency room for a spiking fever and chills. Physical examination is significant for signs of lung consolidation. A chest x-ray shows a cavity in the right lower lobe that has an air/fluid level. A transtracheal aspiration is performed and the specimen is submitted to the laboratory for routine cultures and Gram's stain. Based upon the clinical presentation, which of the following would be the most likely finding?
A. Anaerobic bacteria
B. Aspergillus fumigatus
C. Entamoeba histolytica
D. Staphylococcus aureus
E. Streptococcus pyogenes

Last edited by lee-usmle; 05-27-2010 at 06:47 AM.
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  #2  
Old 05-25-2010
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Default A??

lung abscess...
there is history of alcohol abuse and periodontal disease...so most probably it gonna be Anaerobic bacteria
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  #3  
Old 05-25-2010
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Correct Answer

yup correct answer is A
A. Anaerobic bacteria derived from the oral flora in the clinical setting of periodontal
disease are the most common isolates from lung abscesses. Single lung abscesses are the most common
pattern, with the superior segment of a lower lobe or the posterior segment of an upper lobe being affected
most often.
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The above post was thanked by:
anoop_1198 (05-25-2010), Seetal (05-26-2010)
 
  #4  
Old 05-29-2010
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Default It's A

A is the best answer so far . .
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  #5  
Old 05-29-2010
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Default

yes i also think A is the correct ans.
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  #6  
Old 05-29-2010
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Default

I already said its correct with explanation
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