Click here for more information about laboratory operations and procedures
If you have additional questions regarding this test, please call: 415-353-1667
Streptococcus Group A Antigen
|In House Availability||Daily, day and evening shifts until 9 PM|
|Method||Lateral flow immunassay|
|Collection Instructions||Swab tonsils or tonsilar crypts and posterior pharynx.
Deliver immediately to laboratory. refrigerate if transport is delayed.
|Container type||Polyester (Dacron) swabs x2 in paper envelope or in clean,dry plastic tube (Do not use charcoal transport media)|
|Amount to Collect||2 swabs|
|Sample type||Throat swab|
|Preferred volume||2 swabs|
|Min. Volume||2 swabs
If only one swab is received, Group A Streptococcus Culture will be performed instead of the antigen test.
|UCSF Rejection Criteria||Swab submitted in charcoal media|
|Processing notes||If antigen test is negative set up a group A strep culture|
|Synonyms||Beta-hemolytic Strep; beta-strep|
|Stability||Refrigerated 3 days|
|Turn around times||1 hour after receipt at China Basin Microbiology|
|Reflex?||Negative samples are automatically reflexed to culture at an additional charge.|
|Additional information||Sensitivity is approximately 70% compared with culture. Culture will be performed automatically on antigen negative samples.
Excess blood or mucus on the swab may interfere with the test performance and may yield a false positive result.
|Last Updated||12/15/2015 10:45:17 AM|