Table 1.

Comparison of the Microbial Identification System with conventional tests for identification of yeasts grown on premade SDA plates from BBL and Remel

Species identified with conventional tests (no. of isolates tested)No. (%) of isolates tested with MIDI systemaP values for correct identifications
Correctly identified to species levelIncorrectly identified to species levelUnidentified (no match)
BBL SDARemel SDABBL SDARemel SDABBL SDARemel SDA
Candida spp.
 C. albicans(69)59 (86)44 (64)9 (13)21 (30)1 (1)4 (6)<0.01
 C. dubliniensis(5)3 (60)3 (60)2 (40)2 (40)NS
 C. famata(4)4 (100)4 (100)NS
 C. glabrata(50)44 (88)3 (6)5 (10)37 (74)1 (2)10 (20)<0.001
 C. guilliermondii(14)14 (100)9 (64)5 (36)<0.05
 C. krusei(26)20 (77)20 (77)1 (4)1 (4)5 (19)5 (19)NS
 C. lusitaniae(13)9 (69)9 (69)4 (31)3 (23)1 (8)NS
 C. parapsilosis(93)86 (92)79 (85)2 (2)1 (1)5 (5)13 (14)NS
 C. rugosa(8)1 (13)8 (100)7 (88)NS
 C. tropicalis(80)50 (63)13 (16)16 (20)3 (4)14 (18)64 (80)<0.001
Cryptococcus spp.
 C. albidus(2)2 (100)1 (50)1 (50)NS
 C. humicolus(2)2 (100)1 (50)1 (50)NS
 C. neoformans(9)7 (78)5 (56)2 (22)4 (44)NS
 C. terreus(4)3 (75)3 (75)1 (25)1 (25)NS
Geotrichum candidum(4)3 (75)4 (100)1 (25)NS
Hansenula anomala(6)5 (83)5 (83)1 (17)1 (17)NS
Kluyveromyces marxianus(13)8 (62)7 (54)4 (31)2 (15)1 (8)4 (31)NS
Rhodotorula spp.
 R. pilamanae(1)1 (100)1 (100)NS
 R. rubra(12)11 (92)11 (92)1 (8)1 (8)NS
Saccharomyces cerevisiae(12)12 (100)4 (33)8 (67)<0.005
Sporobolomyces salmonicolor(1)1 (100)1 (100)NS
Trichosporon beigelii(10)3 (30)5 (50)4 (40)4 (40)3 (30)1 (10)NS
  Total (438)326 (74)214 (49)68 (16)100 (23)44 (10)124 (28)<0.001
  • a MIDI, Microbial ID, Inc.