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Evaluation of a new chromogenic agar medium for isolation and identification of Group B streptococci

Lookup NU author(s): Dr John Perry, Professor Kate Gould

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Abstract

Aims: To evaluate a new chromogenic agar as a screening medium for the isolation of Group B streptococci from high vaginal swabs from pregnant women. Methods and Results: The medium was evaluated with 195 high vaginal swabs referred for antenatal screening and compared with blood agar and Granada medium. The new chromogenic medium showed 100% sensitivity for the detection of Group B streptococci, and also showed a positive predictive value of 100%. Granada medium also showed excellent sensitivity and specificity and both media were superior to blood agar. Conclusions: The new chromogenic medium showed excellent performance for the detection of Group B streptococci from clinical samples. Significance and Impact of the Study: This is the first chromogenic medium described for the detection of Group B streptococci. The medium offers an effective and convenient alternative to conventional media, currently used in clinical laboratories.

Publication metadata

Author(s): Perry JD, Oliver M, Nicholson A, Wright J, Gould FK

Publication type: Article

Publication status: Published

Journal: Letters in Applied Microbiology

Year: 2006

Volume: 43

Issue: 6

Pages: 615-618

ISSN (print): 0266-8254

ISSN (electronic): 1472-765X

Publisher: Wiley-Blackwell

URL: http://dx.doi.org/10.1111/j.1472-765X.2006.02023.x

DOI: 10.1111/j.1472-765X.2006.02023.x

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