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Appl Environ Microbiol. 1974 March; 27(3): 575-583
Copyright © 1974 American Society for Microbiology. All Rights Reserved.

r/b Expanders: Their Use in Identifying Routinely and Unusually Reacting Members of Enterobacteriaceae

The Long Island Jewish-Hillside Medical Center, New Hyde Park, New York 11040
Center for Disease Control, Atlanta, Georgia 30333

ABSTRACT

This cooperative study between a large clinical laboratory and a reference laboratory evaluated the performance of the expanded r/b system for identifying Enterobacteriaceae. The 2,200 cultures isolated in the normal hospital routine presented no problem of identification to the r/b system. About 250 "atypical" cultures which were exchanged between the collaborating laboratories were also identified accurately. The expanded r/b system was found to perform as well as most biochemical-physiological identification systems, and when used appropriately was highly satisfactory as a system for identification of Enterobacteriaceae.