Please note that all guidance is currently under review and some may be out of date. We recommend that you also refer to more contemporaneous evidence in the interim.
GBS is a transient bacterium that is commonly found in the gastrointestinal tract, vagina and urethra in 15-25% of pregnant women (asymptomatic carriers of GBS).
GBS is transmitted to the baby during birth in approximately 1–2 per 1000 live births and can lead to serious infection in the baby.
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First published: June 2019
Last web update: June 2019
Review by: TBC
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Page last updated: 17 Feb 2021