I agree with what has already been said about the benefits routine GBS testing and prophylactic treatment being completely unproven. Only a tiny percentage of babies born to GBS positive women will develop GBS infection and prophylactic antibiotic treatment doesn't reliably prevent this.

Having said this, I think anyone relying on the definition of GBS in the studentmidwife.net glossary could be forgiven for thinking that routine testing and prophylactic treatment might be good ideas. The emphasis is on the dangers and prevention of infection, rather than the low risks of infection developing.