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Test Code SBSC Strep B Screen Culture

Specimen Type

vaginal/rectal swab

Preferred Collection Container

E-SWAB

Acceptable Collection Container

Eswab—White or Blue (Mini-tip) Cap

Collection Instructions

A combination lower vaginal and rectal specimen is required. Use swab to first collect vaginal specimen (without use of a speculum) followed by rectal specimen.

Collection Volume

1 swab (vaginal/rectal)

Minimum Collection Volume

1 swab

Rejection Criteria

Single source specimen; Improperly labeled specimens; Dry swabs; Specimens collected >48 hours.

Specimen Storage and Stability

<48 hours at Room Temperature

Day(s) and Time(s) Performed

6:00am – 12:30am

EPIC Code

LAB3559

Turn Around Time

Cultures with no growth will be reported at 2 days. Reports on specimens from which pathogens are isolated will take a minimum of 2 days for completion.

Lab Department

Microbiology

Methodology

Enriched Culture in selective broth followed by PCR to detect Group B Streptococcus

Alias

Strep B Screen Culture; Culture for Streptococcus Group B, Genital; Beta-Hemolytic Strep Group B Culture, Genital; Genital Strep Screen Culture;

Additional Information

The standard of care for preventing Group B Streptococcus (GBS) disease is screening pregnant women at 35-37 weeks of gestation to determine their GBS colonization status. Susceptibility testing of GBS is only performed upon notification to the laboratory that the patient is penicillin allergic.