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Journal of Clinical Microbiology, Jan 1995, 199-201, Vol 33, No. 1
Copyright © 1995 by the American Society for Microbiology. All rights reserved.

Evaluation of new medium with chromogenic substrates for members of the family Enterobacteriaceae in urine samples

H Kodaka, M Ishikawa, M Iwata, F Kashitani, S Mizuochi and K Yamaguchi
Department of Microbiology, School of Medicine, Toho University, Tokyo, Japan.

A new medium containing 5-bromo-4-chloro-3-indolyl-beta-D-glucuronide cyclohexylammonium salt (Glu agar) for Escherichia coli and a new medium containing 5-bromo-3-indolyl-beta-D-galactoside (Gal agar) for beta-galactosidase-positive members of the family Enterobacteriaceae were compared with MacConkey agar in a diagnostic trial with 3,562 urine specimens. The isolation rates of E. coli and beta-galactosidase- positive Enterobacteriaceae were increased 8.4 and 19.5%, respectively. The sensitivities and specificities of Glu agar and Gal agar were 98.5 and 100% and 99.2 and 99.5%, respectively.

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