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Recurrence of Group B Strep High in Subsequent Pregnancies HOUSTON, Tex – August 1, 2008 -- A new study could help experts better decide whether to continue the current practice of retesting women during their second pregnancy for Group B streptococcus (GBS) if they had tested positive for the infection previously. The 2-year study, published in the August 1 issue of Obstetrics and Gynecology, included more than 5,000 women who delivered babies between 2003 and 2004 in the greater Houston, Texas, area. Of the 5,000 women, researchers were able to follow 418 who gave birth vaginally, had a second child or more, and were tested for GBS during their first and second pregnancies. "We found that of the 418, the risk of testing positive for GBS during a second pregnancy was 53%," said lead author Mark A. Turrentine, MD, University of Texas Medical School at Houston, Houston, Texas. According to Dr. Turrentine, research is ongoing to determine why some women are colonised with GBS and others are not. Further studies are needed to determine how to properly use the information from this study. Current guidelines by the US Centers for Disease Control and Prevention and the American College of Obstetricians and Gynecologists state that since colonisation varies from pregnancy to pregnancy, women should be screened with each pregnancy. "Our study did not tackle this issue, but the results could help experts decide whether it is cost effective to keep testing women in subsequent pregnancies if their risk of testing positive remains so high," said Dr. Turrentine. SOURCE: University of Texas Health Science Center at Houston E-mail this page to a friend or colleague! To print, use this version