Comparison of combined vaginal-anorectal, vaginal and anorectal cultures in detecting of group B streptococci in pregnant women in labor
Kovavisarach, E.; Sa-adying, W.; Kanjanahareutai, S.
Journal of the Medical Association of Thailand 90(9): 1710-1714
2007
ISSN/ISBN: 0125-2208 PMID: 17957908 Document Number: 2973
Objective: To compare whether the Group B streptococcal culture detection rate from vaginal-anorectal cultures, vaginal, or anorectal are equivalent.Material and Method. Cross-sectional descriptive study was performed on 320 pregnant women with a gestational age between 28-42 weeks presenting with labor pain, between October, 1 and 30, 2004 in Rajavithi Hospital. Anorectal and vaginal swab cultures were collected and cultured in Todd Hewitt broth with 15 mu g/ ml nalidixic acid and 8 mu g/ml gentamicin.Results: Forty-three (13.44%) and 33 cases (10.31%) were not significantly different in GBS detection rate in vaginal and anorectal culture, respectively (p = 0. 154, McNemar). Combined vaginal-anorectal culture significantly improved the colonization GBS detection rate to 18.12% compared with either individual vaginal or anorectal culture I (p < 0. 00 1, McNemar).Conclusion: GBS detection rate from combined vaginal-anorectal was significantly higher than either individual vaginal or anorectal cultures.
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