TABLE 1.

Identification of yeasts by commercial systems

Organism	No. of isolates	System	No. (%) of isolates with the following identification:
			Correcta	Incompleteb	Incorrect	Unidentified
C. albicans	45	RapID Yeast Plus	45 (100)	0	0	0
		API 20C Aux	42 (93)	3 (7)	0	0
		Vitek YBC	45 (100)	0	0	0
C. tropicalis	39	RapID Yeast Plus	39 (100)	0	0	0
		API 20C	35 (90)	4 (10)	0	0
		Vitek YBC	34 (87)	2 (5)	3 (8)	0
T. glabrata	35	RapID Yeast Plus	32 (91)	3 (9)	0	0
		API 20C Aux	32 (91)	3 (9)	0	0
		Vitek YBC	34 (97)	0	0	1 (3)
C. parapsilosis	27	RapID Yeast Plus	25 (92)	1 (4)	1 (4)	0
		API 20C	27 (100)	0	0	0
		Vitek YBC	19 (70)	5 (19)	3 (11)	0
C. krusei	23	RapID Yeast Plus	23 (100)	0	0	0
		API 20C Aux	0	23 (100)	0	0
		Vitek YBC	15 (65)	2 (9)	0	6 (26)
Cryptococcus neoformans	23	RapID Yeast Plus	22 (96)	0	1 (4)	0
		API 20C Aux	22 (96)	1 (4)	0	0
		Vitek YBC	19 (83)	1 (4)	3 (13)	0
C. lusitaniae	5	RapID Yeast Plus	4 (80)	1 (20)	0	0
		API 20C Aux	5 (100)	0	0	0
		Vitek YBC	5 (100)	0	0	0
Rhodotorula sp.c	2	RapID Yeast Plus	2 (100)	0	0	0
		API 20C Aux	2 (100)	0	0	0
		Vitek YBC	0	0	1 (50)	1 (50)
S. cerevisiae	2	RapID Yeast Plus	1 (50)	1 (50)	0	0
		API 20C Aux	2 (100)	0	0	0
		Vitek YBC	2 (100)	0	0	0
Total	201	RapID Yeast Plus	193 (96)	6 (3)	2 (1)	0
		API 20C Aux	167 (83)	34 (17)	0	0
		Vitek YBC	173 (86)	10 (5)	10 (5)	8 (4)

^aIdentification was made to the species level without supplemental testing. 

^bLow level of discrimination; the correct identification was listed among two or more choices. Supplemental testing is required. 

^cThis organism produces a red pigment and was originally reported as Rhodotorula rubrum. Both the RapID Yeast Plus and API 20C Aux system identified the organism as Rhodotorula minuta, which is also red pigmented. A species identification could not be made by the assimilation test.