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Lab Manual for UCSF Clinical Laboratories

Lab Manual for SFGH

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Item Value
Available Stat? No
Test code GPA
Performed by? Microbiology (Bacteriology)
Sendout? no
Price range $
In House Availability 7 days
Principle Selective Strep Agar is inoculated and incubated for a minimum of 48 hours. Culture plates are examined for beta hemolytic colonies typical of group A streptococci.

No organisms other than group A streptococci are identified.
Interpretation The most commonly sought bacterial pathogen is group A streptococcus, the agent that leads to post-streptococcal sequelae such as acute rheumatic fever and glomerulonephritis. The organism causes pyogenic infections of the tonsils, sinuses, and middle ear or cellulitis as secondary pyogenic sequelae after an episode of pharyngitis. Streptococcal pharyngitis is treated to prevent both the suppurative and nonsuppurative sequelae, as well as to decrease morbidity.
Container type transport medium
Collection Instructions Thoroughly rub two moistened swabs over the tonsillar and faucial region. Take care to avoid the tongue and uvula. Place the swabs into transport medium.
Sample type Swab
Special instructions On the requisition, mark the box "group A strep only" under the section for "Test for specific organism."
Synonyms Streptococcus Group A only Culture;Throat Culture;
Stability Keep transport medium at room temperature until the next messenger pick up.
References 1. Forbes BA, et al. Bailey and Scott's Diagnostic Microbiology, 11th Ed. Mosby, St. Louis MO, 2002.

2. Murray PR, et al. Manual of Clinical Microbiology, 9th Ed., ASM Press, Washington DC, 2007.

CPT coding 87081
Last Updated 8/19/2009 1:19:17 PM
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