Culture, Streptococcus, Group B

For Specimen Integrity during Extreme Weather see the “Lockbox Usage in Extreme Weather” document at the top of this page.

Test Code

Alias/See Also
Streptococcus Group B Culture;
Strep Group B Screen by Culture (Source=Genital and/or Anal and/or Rectal and/or Vaginal/Rectal);

CPT Codes
87081***When a culture is positive there will be a reflex for each identification and susceptibility

Preferred Specimen
1 culture swab, usually from vaginal, cervical, or rectal source. A combined vaginal/rectal is preferred.

Indicate source.
1. Cervix: Do not use lubricant during procedure. Wipe the cervix clean of vaginal secretions and mucus. Rotate a sterile swab, and obtain exudate from the endocervical glands. If no exudate is seen, insert a sterile swab into the endocervical canal, and rotate the swab.
2. Vaginal Secretions: Use a speculum without lubricant. Collect secretions from the mucosa high in the vaginal canal with sterile pipette or swab.
3. Rectal: The swab is inserted 1 to 1.5 inches into the anal canal and is rotated firmly as it is being pulled out of the canal.

Transport Container
Culture Swab (teal green cap)

Transport Temperature
Room Temperature

Specimen Stability
Room Temperature = 2 days
Refrigerated = 2 days
Frozen = unacceptable

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Processing of specimen will be delayed if test is not indicated on requisition.  Frozen specimen.

Conventional Isolation and Identification Techniques. Susceptibilities will be performed on appropriate isolates.

Setup Schedule
Sunday - Saturday

Report Available
5 days

Clinical Significance
Group B Streptococci can be one of the most significant pathogens in the neonatal period. The organism is transmitted to the newborn through the birth canal. Prepartum vaginal and anorectal cultures are important to determine carriage.

Performing Laboratory
CompuNet Clinical Laboratories, LLC
2308 Sandridge Drive
Moraine, OH 45439

Last Updated: December 7, 2021

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.