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Updated: Jul 19, 2026
Development of a More Sensitive and Specific Chromogenic Agar Medium for the Detection of Vibrio parahaemolyticus and Other Vibrio Species
Published on: November 8, 2016
Evaluation of a new chromogenic agar medium for isolation and identification of Group B streptococci
J D Perry1, M Oliver, A Nicholson
1Microbiology Department, Freeman Hospital, Newcastle upon Tyne, UK. jdp@blueyonder.co.uk
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.
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