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HelpTest Code GBS Group B Strep Detection by PCR (Prenatal)
Performing Laboratory
Hunterdon Medical Center Laboratory
Useful For
Prenatal screening (35-37 weeks gestation): Group B Strep carriers can be identified and given antimicrobial prophylaxis during delivery to reduce the risk to the neonate.
Special Instructions
Susceptibility testing is not required unless patient is penicillin- allergic*; the addition of a culture to recover the organism for susceptibility testing may be requested by the physician within one week of receiving a positive PCR result.
*Note: If penicillin-allergic status is known prior to ordering, please order alternate test: GBSR- Group B Strep Detection with Reflex to Culture. (Prenatal)
Specimen Required
Dual-tipped routine culture collection swab.
Specimen Type
Vaginal/Rectal Swab
Specimen Transport Temperature
Ambient temperature (15-25°C).
Deliver within 24 hours.
Specimen Stability Information
| Temperature | Time Frame |
| Ambient 15-25°C | 24 hours |
| Refrigerated 2-8°C | 72 hours |
Day(s) Test Setup
Monday through Sunday
Reference Values
Negative
Methodology
Nucleic Acid Amplification (NAA, PCR). Enrichment media utilized to optimize the recovery of Group B Strep.
CPT Code Information
87150
LOINC Code Information
48683-7