Table 1.

Yeast identification using a MALDI Biotyper for common isolates in the prospective study

Phenotypic identification (no. of isolates tested)No. of Isolates with Bruker scoreb of:Discordant identification (no. of isolates)a
<1.71.7–1.7991.8–1.999≥2.0
Aureobasidium/Hormonema sp. (3)21
C. albicans (81)279C. dubliniensis (2)
C. glabrata (16)16
C. guilliermondii (4)13
C. kefyr (2)2
C. krusei/C. inconspicua (4)4C. krusei (4)
C. lusitaniae (3)3
C. parapsilosis (11)29
C. pelliculosa (1)1
Candida spp. (3)1C. glabrata (1)
2C. lipolytica (2)
C. tropicalis (5)14
Cr. neoformans (1)1
Pseudozyma sp. (1)1
S. cerevisiae (3)3
Totalc (138) (%)4 (2.9)1 (0.7)6 (4.3)127 (92.0)
  • a All discordant results were resolved using D2 sequencing.

  • b Results from two replicates and repeat testing. The numbers of isolates (n = 11) that resolved on repeat testing at the species level were as follows: for C. albicans, 6; for C. krusei, 1; for C. pelliculosa, 1; for C. lusitaniae, 2; and for C. tropicalis, 1.

  • c The numbers of isolates (n = 7) excluded from the study, as the isolates were not present in the Bruker library, were as follows: for C. naganishii, 1; for Cryptococcus sp. (not C. neoformans), 3; for C. sojae, 1; and for Rhodotorula minuta, 2.