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Journal of Clinical Microbiology, May 1998, p. 1443-1445, Vol. 36, No. 5
Department of Pathology, Memorial Hospital of Rhode Island,
Pawtucket, Rhode Island 028601;
Department of Pathology, Veterans' Administration Medical
Center, Providence, Rhode Island 029083; and
Department of Pathology and Laboratory Medicine, Brown
University School of Medicine, Providence, Rhode Island
029012
Received 30 December 1997/Returned for modification 26 January
1998/Accepted 3 February 1998
The RapID Yeast Plus system (Innovative Diagnostic Systems,
Norcross, Ga.) is a qualitative micromethod employing conventional tests and single-substrate chromogenic tests and having a 4-h incubation period. This system was compared with the API20C (bioMerieux Vitek, Hazelwood, Mo.) system, a 24- to 72-h carbohydrate assimilation method. One hundred thirty-three clinical yeast isolates, including 57 of Candida albicans, 26 of Candida tropicalis,
23 of Candida glabrata, and 27 of other yeasts, were tested
by both methods. When discrepancies occurred, isolates were further
tested by the Automated Yeast Biochemical Card (bioMerieux Vitek). Germ
tube production and microscopic morphology were used as needed to
definitively identify yeast isolates. The RapID Yeast Plus system
correctly identified 125 yeast isolates, with an overall accuracy of
94% (125 of 133). Excellent correlation was found in the recognition of the three yeasts most commonly isolated from human sources. The test
was 99% (105 of 106 isolates) accurate with C. albicans, C. tropicalis, and C. glabrata. The RapID Yeast
Plus system compares favorably with the API20C system and provides a
simple, accurate alternative to conventional assimilation methods for
the rapid identification of the most commonly encountered isolates of
Candida species.
0095-1137/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
Comparison of the Rapid Yeast Plus Panel with the
API20C Yeast System for Identification of Clinically Significant
Isolates of Candida Species
*
Corresponding author. Mailing address: Microbiology
Laboratory, Memorial Hospital of Rhode Island, 111 Brewster St.,
Pawtucket, RI 02860. Phone: (401) 729-2839. Fax: (401) 729-2990.
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