Group B Strep Culture Screen
Test Mnemonic
GRPBSC
CPT Codes
- 87081 - QTY (1)
LOINC ®
584-3
Performing Laboratory
Cleveland Clinic Laboratories
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | 24 hours |
| Refrigerated | 24 hrs |
| Frozen | Unacceptable |
Days Performed
Sun - Sat
Turnaround Time
7 days
Methodology
| Name | Description |
|---|---|
| Culture, Identification |
Reference Range
| Culture Result | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| No Beta Streptococcus Group B Isolated |
Special Info
Specimens must be collected by swabbing the distal vagina, followed by the rectum (insert swab through the anal sphincter using the same swab). After receipt in the lab, a preincubation step in selective broth is performed to optimize sensitivity. Group B Streptococcus (GBS) detection for vaginal-rectal specimens is also available by PCR (GBSPCR).
Clinical Info
Many women harbor Group B streptococci (Streptococcus agalactiae) that can cause infections during pregnancy or in neonates after birth. This test is intended for screening of pregnant women for vaginal and rectal Group B streptococcal colonization between 35 and 37 weeks gestation. If the patient is ß-lactam allergic, susceptibility testing should also be ordered. For the diagnosis of GBS disease, routine culture of the symptomatic body site (e.g., blood, CSF, amniotic fluid, joint fluid) should be ordered rather than a screening test.