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Journal of Clinical Microbiology, February 1998, p. 543-547, Vol. 36, No. 2
R. M. Alden Research Laboratory, Santa
Monica-UCLA Medical Center, Santa Monica, California
90404,1 and
UCLA School of Medicine,
Los Angeles, California 900242
Received 7 July 1997/Returned for modification 20 July
1997/Accepted 10 November 1997
Due to the difficulty of identifying Corynebacterium
spp. with standard methods, we compared them with the RapID CB
Plus system (Remel, Lenexa, Kans. [formerly Innovative Diagnostic
Systems, Norcross, Ga.]), which consists of 4 carbohydrate and 14 preformed enzyme tests, for the identification of 98 clinical isolates
of Corynebacterium sp., other coryneforms,
Listeria monocytogenes, and 17 ATCC strains. Forty (95%)
of 42 strains of Corynebacterium spp.
were accurately identified to the species level by the RapID CB Plus
system, and two additional strains of C. striatum were identified with one additional conventional test for lipid
requirement. Twenty-seven (75%) of the 36 coryneform strains
tested were identified correctly to the species level. However, three
of four strains of Brevibacterium sp. and all seven of the
L. monocytogenes strains were identified to the genus level
only. Actinomyces strains had variable results, and the one
strain of Arcanobacterium haemolyticum tested was not
identified. Overall, the RapID CB Plus system compared favorably with
the conventional methods, was easy to inoculate and interpret,
and is promising as a new method for identification of gram-positive
bacilli.
0095-1137/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
Evaluation of the RapID CB Plus System for
Identification of Corynebacterium Species and Other
Gram-Positive Rods
*
Corresponding author. Mailing address: R. M. Alden
Research Laboratory, 2021 Santa Monica Blvd., Suite 640E, Santa Monica, CA 90404. Phone: (310) 315-1511. Fax: (310) 315-3662.
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