Streptococcus Group B by PCR
Also known as: GBS PCR
Use
This test is used to detect genital and rectal Group B Streptococcus in pregnant individuals at 36-37 weeks of gestation. Detecting Group B Streptococcus is crucial as it helps prevent neonatal sepsis, pneumonia, and meningitis, which are potential risks during childbirth if the bacteria are transmitted from mother to child.
Special Instructions
Patient preparation involves collecting a vaginal then rectal specimen with the same swab from pregnant individuals at 36-37 weeks of gestation. Specimen source must be specified, and specimens should be transferred to Liquid Stuart media or Amies media (eSwab ARUP supply #45877) after collection.
Limitations
Routine susceptibility testing for Group B Streptococci is not performed due to predictable susceptibility to penicillin and most other beta-lactams. Susceptibility testing is available upon request for penicillin-allergic patients. Incorrect specimen media can lead to rejection, and specimens must be processed within stability limits.
FDA ApprovedNew York Approved
Methodology
PCR-based (PCR)
Biomarkers
LOINC Codes
- 91875-5
- 31208-2
Result Turnaround Time
1-2 days
Related Documents
For more information, please review the documents below
Specimen
Vaginal Swab
Volume
Not provided
Minimum Volume
Not provided
Container
Liquid Stuart media or Amies media
Collection Instructions
Collect vaginal then rectal specimen with the same swab from pregnant individuals at 36-37 weeks of gestation. Transfer swab to Liquid Stuart media or Amies media (eSwab ARUP supply #45877).
Causes for Rejection
Specimens in any transport media other than indicated above.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 24 hours |
| Refrigerated | 6 days |
| Frozen | Unacceptable |