Group-B strep is very common, colonized generally in the lower intestine and vagina/rectal area. While it can be present in many people as part of their normal flora, it can be DEADLY to neonates, who have no immunity to this bacterium, causing massive neonatal sepsis. It is NOT the same bacterium that causes STREP THROAT, (Strep-A), you must tell her. When this bacterium is found in other places, such as the uterus, it can also cause serious infection in adults.
Usually, our ladies are tested later in pregnancy, (or if they show signs of or at risk of preterm labor), and if found to be carriers, are treated prophylactically with I.V. antibiotics----esp. if their water breaks or labor ensues. They are given antibiotics every few hours the duration of labor and the newborns are watched for s/s of group-B problems. Some doctors test patients early on in pregnancy (ours don't usually) and treat with P.O. antibiotics during pregnancy. The effectiveness of this is still debated, but is a standard of care for some. Our doctors treat ladies who were positive in prior pregnancies as positive once again in future labors.
There are a lot of websites and bulletin boards regarding this very important subject.
has a board moderated by a very knowledgeable host and personal experiences are discussed here.
Also there is the Group B Strep Association: www.groupbstrep.org
is where you can find out more.
You might want to refer this expectant mom to parentsplace, as they speak in laymen's terms that we all can understand, and with all the positive feedback I see there, she may find it comforting.
She WILL be treated as POSITIVE in delivery, mark my words. That they tested now, means they must treat once positive. How they choose to is up to the doctors in her practice. We deal with this in labor/delivery VERY frequently, and there is no place I have heard of that does not treat aggressively while Mom is in labor and if a baby manifests ANY remote sign of Group-B infection. It is THAT critical. Good luck!