Group B Strep (GBS) Screening

However, the Royal College of Obstetricians and Gynaecologists recommends screening women in whom GBS was detected in a previous pregnancy at 35-37 weeks of gestation or 3-5 weeks prior to the anticipated delivery date.

This screening determines the carriage status close to delivery and provides information that helps to assess the risk of early-onset GBS.

Sample type

Lower vaginal swab and/or anorectal swab

Specimen requirements

Swabs should be sent in ∑-TRANSWAB® (MWE) (purple top); if unavailable use Amies medium black top swab

Minimum volume

N/A

Frequency of test

Daily

Turnaround time

7 days

What to request on EPR

Group B Strep (GBS) 3rd trimester pregnancy screen MCS