USMLE Step 1 QUESTION of the DAY!

A man presents with fever, splenomegaly, anemia, and petechiae. After a full work-up he is diagnosed with subacute bacterial endocarditis caused by Streptococcus viridans. Which of the following is the most likely site to be the source of the organism?

A) colon
B) skin
C) urethra
D) oropharynx
E) liver


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Answer: D) oropharynx. Subacute bacterial endocarditis has manifestations of fever, splenomegaly, petechiae, anemia, and hematuria. The cause of subacute BE is often Streptococcus viridans after oral or dental procedures. Prophylaxis antibiotics should be given prior to these procedures for people at risk.



USMLE Step 1 D.O.C. of the DAY!

Drug of choice for

Bordetella pertussis causing whooping cough

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Erythromycin


USMLE Step 1 Fact of the Day!

Bug Profile:
Campylobacter jejuni
-gram (-), curved rods
-reservoirs cattle, chickens, dogs
-watery, foul smelling stools becoming bloody
-most common cause of diarrhea in US
-associated with Gullain-Barre
-may lead to Reiter’s syndrome