Northwest LaboratoryPathology is now Avero Diagnostics.


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Group B Strep with Broth Enrichment

Molecular Pathology, Gynecologic Pathology

Test Code


CPT Code


Transport Temperature and Stability

Room temperature 48 hours

Rejection Criteria

Vial with no swab present, incorrect swab used, specimens past stability, expired media

Transport Container / Specimen

Copan E-Swab

Turn Around Time

24 - 48 hours


  1. Wipe away excess secretions or discharge from the vaginal area.
  2. Insert the swab into the lower one-third part of the vagina, and sample secretions from the mucosa.
  3. Insert the same swab approximately 2.5 cm beyond the anal sphincter and rotate to sample anal crypts.
  4. Immediately place the swab into the transport tube.
  5. Carefully break the swab shaft at the score line.
  6. Cap the specimen transport tube tightly, label with two patient identifiers.

Test Setup

Monday - Friday (days)


RT-PCR via LIM broth enrichment

Download the requisition.