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Test Code GBPCR Group B Strep Screen, PCR

Additional Codes

EPIC LAB4775

Purpose

For the detection of Group B Streptococcus (GBS) DNA obtained from antepartum pregnant women.

Methodology

PCR  (BD MAX)

Sample Type

Culture Swab (Vaginal/perirectal)

Specimen Stability

Temperature Time
Ambient (21-30°C) 48 hours
Refrigerated (2-8°C) 72 hours
Frozen (-15 to -30°C) N/A

NOTE: The stability refers to specimen swabs prior to innoculation of LIM broth.

Result Reporting

Negative
Negative for Group B Strep by LIM broth enrichment and PCR nucleic acid detection

 

Positive
Positive for Group B Strep by LIM broth enrichment and PCR nucleic acid detection*

*Penicillin is active against 100% of GBS, cefazolin can be used when patients have mild penicillin allergy. Clindamycin should be used in patients at high risk of anaphylaxis. Contact Microbiology for susceptibility testing when clinically indicated. NOTE: Studies indicate 40% resistance to Clindamycin in SGB.

Rejection Criteria

  • Samples outside stability limits
  • Samples not properly labeled (2 patient identifiers required)

Availability

Performed STAT
Daily at 1000 No

 

Performing Laboratory

MultiCare Yakima Memorial Hospital Laboratory

Lab Department

Microbiology

CPT Code

87653

LOINC

91847-4 S. agalactiae DNA NAA+probe Ql (Genital specimen)