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NBME 15 Answers

nbme15/Block 2/Question#14 (8.2 difficulty score)
A 25-year-old woman with a history of ...
Streptococcus mitisπŸ”
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 +1 
submitted by ergogenic22(303),
unscramble the site ⋅ remove ads ⋅ become a member ($39/month)

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 +1 
submitted by trazobone(14),

Strep Viridans is oral flora causes subacute endocarditis affecting previously damaged valves, and is often associated with sequelae of dental procedure.

A) Enterococci can also cause subacute endocarditis but they are gamma hemolytic and follow GG/UI procedure B) beta hemolysis causes acute beta hemolysis and i got too lazy to unscramble the rest i dont think it even addresses my question

trazobone  Strep mitis is part of the viridans group of streptococci, most commonly found in throat, nasopharynx, mouth. Gram + facultative anaerobe, catalase (-) and alpha hemolytic +1  
whk123  Also, the image gives a clue (also present in FA strep pneumo section) that it belongs to strep family, strep pneumo ruled out because it is beta-hemolytic so strep mitis is left which eventually is alpha-hemolytic +1  
trazobone  Wait no strep pneumo is also alpha hemolytic. I think you meant to type staph aureus +  
whk123  OMG, where the heck my one line went- EDIT: strep pneumo ruled out because it is not associated with heart issues and dental procedure thing present in the scenario, staph aureus ruled out because it is beta-hemolytic so... Thanks trazobone for bringing this to attention +1  

Strep mutans (of Strep Viridans group) causes dental caries "cavities"

+/- dentist(50),