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Updated: Jun 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
Comparison of two chromogenic media for selective isolation of vancomycin-resistant enterococci from stool specimens
Heidrun Peltroche-Llacsahuanga1, Janetta Top, Josefine Weber-Heynemann
1Institute of Medical Microbiology, RWTH Aachen University Hospital, Aachen, Germany.
Abstract:
Two chromogenic media (Chromagar VRE and chromID VRE [C-ID]) performed equally well in the direct detection of vancomycin-resistant enterococci (VRE) in stool specimens after an overnight enrichment step and a 48-h incubation period, with a sensitivity of 98.2% (56/57) for both and specificities of 96.5% (195/202) and 97.5% (197/202), respectively. However, assigning discriminatory colony color was sometimes difficult, especially on C-ID. In order to facilitate simple species identification, biochemical key reactions were implemented.
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