Test Code GAS Strep A Antigen
Performing Laboratory
Chilton Hospital Laboratory-MicrobiologyMethodology
Optical ImmunoassaySpecimen Requirements
Collect specimen before start of administration of antimicrobial therapy.
Specimen Type: Throat
Container/Tube: Sterile polyester swab
Specimen Volume: Entire specimen
Collection Instructions:
1. Remove cap and swab from tube.
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 doesn’t touch oral mucosa or tongue.
4. If the 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 swab.
6. Return swab to transport tube, pushing swab into transport fluid.
7. Label tube with patient’s name (first and last), date and actual time of collection, and source of specimen.
8. Place tube in a biohazard bag and seal.
Specimen Transport Temperature
AmbientReference Values
Negative for group A beta-strep antigenResults are confirmed with culture.
Critical value (automatic call-back): positives
Day(s) Test Set Up
Monday through SundayAvailable STAT
Turnaround Time:
Routine-24 hours