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A previously healthy 6 month old girl is brought to GP with left ear pain. She has no history of major medical illness and her vaccinations are up to date. Her temp is 39.3. Physical exam shows erythematous dull and bulging left tympanic membrane. 1. What is most common cause of otitis media and sinusitis? 2. What virulence factor plays largest role in this organisms pathogenecity? Why?

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The General Principles section of the USMLE covers these topics:
Biochemistry
Genetics
Microbiology
Pathology
Pharmacology


1. A previously healthy 6 month old girl is brought to GP with left ear pain. She has no history of major medical illness and her vaccinations are up to date. Her temp is 39.3. Physical exam shows erythematous dull and bulging left tympanic membrane. 1. What is most common cause of otitis media and sinusitis? 2. What virulence factor plays largest role in this organisms pathogenecity? Why?





 
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