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8 Cards in this Set
- Front
- Back
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What is the major treatable cause of pharyngitis?
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Group A Strep
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What are important other causes of pharyngitis to remember?
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Influenza (treatable) EBV (long course) HIV (duh)
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What are the Centor criteria?
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They are criteria to predict the presence of group a strep. (F)ever, (A)denopathy, (C)ough, (E)xudates (younger than 15 add 1 point, older than 44, subtract one point)
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How are the centor criteria used?
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3 or more criteria has a positive predictive value of 40-60% (risk 60%). 1 or less criteria has a negative predictive value of 80% (risk less than 10%).
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How is the rapid strep test affected by the centor criteria?
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The more criteria fulfilled, the more sensitive and specific the rapid strep antigen test.
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What percentage of pharyngitis is strep? What is the precentage of viruses? what percentage is no pathogen found? what percentage are non-strep bacterial causes?
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15% of pharyngitis is strep. 50% of pharyngitis is viral. no pathogen is found in 30%. Non-strep bacteria cause less than 5% of strep.
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What are the reasons to pursue antibiotic therapy in strep pharygitis?
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Prevent rheumatic sequelae, prevent suppurative sequelae, reduce symptoms, prevent transmission.
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What criteria must be met to prescribe antibiotics for pharyngitis?
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Greater than 2 of 4 Centor criteria met, positive rapid strep
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