Group B Strep

I recently had a Group B Strep test performed and I needed to know the actual procedures administered, because I did not get a full explanation from my physician about it. Also, I understand that its a bacteria of some kind, but I would like to know where does it come from or what causes this bacteria to form. Can this bacteria be in any part of the body or just the vagina or anus? Also, is this most common mostly during pregnancy or can anyone develop this bacteria?

[Kevin Pho, MD]

Hello - thanks for asking your question.

Group B streptococcus (GBS) is one of many types of streptococcus. It can be identified and distinguished from other types of streptococcus (for example, group A streptococcus, which causes a "strep throat") by its unique characteristics in the microbiology laboratory.

A person can become colonized with GBS. Colonization is the term for when bacteria are present in the body but not causing symptoms or disease; a man or woman who is colonized with GBS is called a GBS "carrier." Colonization may be transient, intermittent, or chronic, and, in women, primarily involves the bowel (including the anus) and vagina. Colonization results from transmission of bacteria from mother to baby at birth or close contact with a GBS carrier. Although GBS is not considered a sexually transmitted disease, a person can become colonized from sexual activity. Between 5 and 40 percent of women (both pregnant and nonpregnant) are colonized with
GBS in the rectovaginal area. GBS colonization is not harmful and is usually not treated, except at the time of delivery .

Followup with your personal physician is essential.

This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.

Thanks,
Kevin, M.D.

Bibliography:
Barss et al.  Patient information: The group B streptococcus and pregnancy.  UptoDate, 2003.

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