Basidiomycota, Agaricomycotina, Trichosporonales, Trichosporonaceae. Genus: TRICHOSPORON
Trichosporon austroamericanum Francisco et al.
Latest update: 12 June 2024
Colony characteristics
Colonies (YPG, 7 d, 25°C) growing slowly, cream colored, cerebriform and somewhat raised at the centre, flat with slight fissures in the marginal part.
Microscopy
Hyphae abundant, septate every 15-30 μm, 1.0-2.5 μm wide, locally forming (sub)spherical to ellipsoidal budding cells measuring 2-4 × 1.5-3.0 μm; hyphae later falling apart into long, cylindrical arthroconidia. Appressoria absent. Sexual state unknown.
Differential diagnosis
The species is close to T. inkin but differs by growth at 45°C, no growth with succinate and citrate, and no growth in the presence of 50% glucose, by rDNA IGS and ITS sequences and by Maldi-tof (Francisco et al., 2024).
Pathogenicity
RG-1, BSL-1. Repeatedly isolated from clinical specimens and from white piedra on human hair; natural habitat being unknown (Francisco et al., 2024).
References
Nomenclature
Trichosporon austroamericanum Francisco, Colombo, Desnos-Ollivier & Hagen, in Francisco, Desnos-Ollivier, Dieleman, Boekhout, Santos, Medina-Pestana, Colombo & Hagen – Mycopathologia 189(43) 11, 2024; type strain: CBS 17435; IGS rDNA = OM472496, ITS rDNA = PP192021.
Antifungal susceptibility
| Antifungal | MICs range | Strains | Reference |
| AMB | 1-8 | 7 | Francisco et al. (2024) |
| FCZ | 2-4 | 7 | Francisco et al. (2024) |
| ISA | 0.03-0.125 | 7 | Francisco et al. (2024) |
| PCZ | 0.03-0.25 | 7 | Francisco et al. (2024) |
| VCZ | 0.03-0.06 | 7 | Francisco et al. (2024) |
