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J Microbiol Methods. 2008 Jun;73(3):263-5. doi: 10.1016/j.mimet.2008.02.024. Epub 2008 Mar 30.

Comparative evaluation of Strepto B ID chromogenic medium and Granada media for the detection of Group B streptococcus from vaginal samples of pregnant women.

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  • 1Service de Bactériologie, Groupe Hospitalier Cochin-Saint Vincent de Paul, Assistance Publique-Hôpitaux de Paris, Centre National de Référence des Streptocoques, Paris, France.


Two types of selective media, the chromogenic medium Strepto B ID and two non-chromogenic media Strepto B agar and the Granada medium, were tested and compared to blood agar plates (BAP) for screening of Group B streptococcus vaginal colonization in pregnant women. All tested media were comparable in terms of sensitivity however, their use in routine laboratories may markedly facilitate the rapid detection of GBS in vaginal samples.

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