Group A Streptococcus Direct, DNA Probe

CPT: 87650
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Test Details


  • Streptococcus Group A Direct, DNA Probe
  • Gen-Probe® Group A Streptococcus Direct Test


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.


DNA probe

Specimen Requirements


Swab of posterior oropharynx, tonsils, or other inflamed area


One or two swabs


Copan Double Dacron dry swab in transport tube without medium (red cap)

Storage Instructions

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.

Causes for Rejection

Throat swab that contains visible blood; improper labeling; inappropriate specimen transport device; specimen received after prolonged delay (more than 48 hours); source other than throat

Clinical Information


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


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
180786 Strep Gp A Direct, DNA Probe 5036-9 180786 Strep Gp A Direct, DNA Probe 5036-9

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