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Lett Appl Microbiol. 2006 Dec;43(6):615-8.

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

Author information

1
Microbiology Department, Freeman Hospital, Newcastle upon Tyne, UK. jdp@blueyonder.co.uk

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.

[Indexed for MEDLINE]
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