Test Code GASS Group A Beta Strep, Rapid Antigen Screen, Throat
Performing Laboratory
MaineGeneral Medical Center
Reference Values
Negative
If negative, culture confirmation is recommended.
Day(s) Test Performed
Monday through Sunday
Methodology
Color Immunochromatographic Dipstick Technology
Note: This test will reflex to GASC “Culture, Group A Beta Strep, Throat” if screen result is negative.
Specimen Requirements
Specimen must arrive within 24 hours of collection.
1. Obtain specimen using a culture swab.
2. Tilt patient’s head back to assist in opening of mouth as wide as possible.
3. Depress tongue with a tongue depressor so swab does not touch oral mucosa or tongue.
4. If patient has complained of 1 spot being sore, swab that area well.
5. In 1 continuous motion:
A. Swab 1 tonsillar area up then down.
B. Move to back of throat as far down as possible and swab there.
C. Move to other tonsillar area and swab.
D. Swab behind uvula and remove the swab.
6. Return swab to sterile culture tube, and crush ampule to ensure specimen preservation.
7. Label tube with patient’s name (first and last), date of birth, date and actual time of collection, and type of specimen.
8. Maintain sterility and forward promptly.
Note: Specimen source is required on request form for processing.
Test Classification and CPT Coding
87081 - culture, presumptive, pathogenic organisms, screening only
87070 - culture, bacterial; any other source except urine, blood or stool, aerobic, with isolation and presumptive identification of isolates (if appropriate)