TABLE 1

Performance of Vitek MS according to the different databases for the identification of Trichosporon, Cutaneotrichosporon, and Apiotrichum clinically relevant species

Species (n)IVD databaseOriginal RUO databaseUpgraded RUO database
No. (%) with correct species ID% confidence levelNo. (%) with correct species ID% confidence levelNo. (%) with correct species ID% confidence level
Trichosporon species (76)56 (73.6)84.6–99.952 (68.4)78–99.976 (100)94.5–99.9
    Trichosporon asahii (26)26 (100)99.926 (100)90–99.926 (100)94.5–99.9
    Trichosporon inkin (21)19 (90.4)84.6–99.916 (76.1)78–99.921 (100)99.9
    Trichosporon faecale (13)a0 (0) 0 (0) 13 (100)95–99.9
    Trichosporon asteroides (10)10 (100)99–99.910 (100)81.1–99.910 (100)99–99.9
    Trichosporon coremiiforme (3)b0 (0) 0 (0) 3 (100)99.9
    Trichosporon ovoides (1)1 (100)99.90 (0) 1 (100)99.9
    Trichosporon lactis (1)0 (0) 0 (0) 1 (100)99.9
    Trichosporon japonicum (1)0 (0) 0 (0) 1 (100)99.9
Cutaneotrichosporon species (20)1 (5)99.91 (5)99.920 (100)90.4–99.9
    Cutaneotrichosporon dermatis (12)c0 (0) 0 (0) 12 (100)92–99.9
    Cutaneotrichosporon jirovecii (4)d0 (0) 0 (0) 4 (100)90.4–99.9
    Cutaneotrichosporon mucoides (1)1 (100)99.91 (100)99.91 (100)99.9
    Cutaneotrichosporon debeurmannianum (3)0 (0) 0 (0) 3 (100)99.9
Apiotrichum species (12)0 (0) 0 (0) 12 (100)82.5–99.9
    Apiotrichum mycotoxinivorans (5)0 (0) 0 (0) 5 (100)99.9
    Apiotrichum montevideense (5)e0 (0) 0 (0) 5 (100)82.5–99.9
    Apiotrichum loubieri (1)0 (0) 0 (0) 1 (100)99.9
    Apiotrichum domesticum (1)0 (0) 0 (0) 1 (100)99.9
  • a One isolate was identified to the genus level by the RUO database.

  • b One isolate was misidentified as Trichosporon asahii by the RUO database.

  • c All isolates were misidentified as Trichosporon mucoides by the IVD database, while eight isolates were misidentified as Trichosporon cutaneum/T. mucoides and four were classified as Trichosporon sp. by the RUO database.

  • d One isolate was misidentified as Candida valida by the IVD database (confidence level, 50%).

  • e One isolate was misidentified as Candida albicans by the IVD database (confidence level, 95.4%).