Unveiling Trichosporon austroamericanum sp. nov.: A Novel Emerging Opportunistic Basidiomycetous Yeast Species

Author(s)

Francisco, Elaine C. ; Desnos-Ollivier, Marie ; Dieleman, Chendo ; Boekhout, Teun ; Santos, Daniel Wagner de C. L. ; Medina-Pestana, Jose O. ; Colombo, Arnaldo L. ; Hagen, Ferry

• Document type: Journal article
• Source: Mycopathologia; v. 189, n. 3, p. 14-pg., 2024-06-01.

Abstract

During an epidemiological survey, a potential novel species within the basidiomycetous yeast genus Trichosporon was observed. The clinical strain was obtained from a urine sample taken from a Brazilian kidney transplant recipient. The strain was molecularly identified using the intergenic spacer (IGS1) ribosomal DNA locus and a subsequent phylogenetic analysis showed that multiple strains that were previously reported by other studies shared an identical IGS1-genotype most closely related to that of Trichosporon inkin. However, none of these studies provided an in-depth characterization of the involved strains to describe it as a new taxon. Here, we present the novel clinically relevant yeast for which we propose the name Trichosporon austroamericanum sp. nov. (holotype CBS H-24937). T. austroamericanum can be distinguished from other siblings in the genus Trichosporon using morphological, physiological, and phylogenetic characters. (AU)

• FAPESP's process: 17/02203-7 - Multidisciplinary and international network to characterize microbiological aspects and natural history of invasive fungal infections due Candida spp
• Grantee: Arnaldo Lopes Colombo
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 19/24960-0 - International partnership for the evaluation of genetic heterogeneity of Trichosporon sp. clinical isolates and impact on taxonomy, biology and species identification
• Grantee: Elaine Cristina Francisco Del Ciello
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 21/10599-3 - The Antimicrobial Resistance Institute of São Paulo (The Aries Project)
• Grantee: Arnaldo Lopes Colombo
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC