Group A Streptococcus Direct, DNA Probe

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Turnaround Time: 1 - 2 days
CPT Code:


Test Type: One or two swabs of posterior oropharynx, tonsils


Uses nucleic acid hybridization for the qualitative detection of group A streptococcal RNA as an aid in the diagnosis of group A streptococcal pharyngitis from throat swabs.

Blood and potentially other chemiluminescent substances may interfere with this test. A negative test does not exclude the possibility that the numbers of group A streptococcal cells may be below the level of detection of the assay. Some strains of Streptococcus equi and rare strains of nonhemolytic streptococci which react with group G antisera may result in a false-positive reaction.

Gen-Probe® Group a Streptococcus Direct Test package insert, Gen-Probe® Incorporated, San Diego, Ca.

Collection Details:

Collection Instructions:

Copan Double Dacron dry swab in transport tube without medium (red cap) preferred; Copan Double Dacron swab in liquid Amies or liquid Stuart medium.

Throat swabs are transported to the laboratory at room temperature within 48 hours after specimen collection. After receipt in the laboratory, specimens are stored refrigerated and tested within 72 hours.