Aspergillus calidoustus sp. nov., causative agent of human infections previously assigned to Aspergillus ustus.
SourceEukaryotic Cell, 7, 4, (2008), pp. 630-638
Article / Letter to editor
Display more detailsDisplay less details
SubjectN4i 2: Invasive mycoses and compromised host; NCMLS 1: Immunity, infection and tissue repair; NCMLS 1: Infection and autoimmunity; UMCN 4.1: Microbial pathogenesis and host defense
Aspergillus ustus is a relatively rare human pathogen causing invasive infections in immunocompromised hosts. In this study isolates originating from clinical and other sources have been examined using molecular, morphological, and physiological approaches to clarify their species assignment. Phylogenetic analysis of partial beta-tubulin, calmodulin, actin, and intergenic transcribed spacer sequences indicated that none of the clinical isolates recognized previously as A. ustus belongs to this species. All but two of these isolates formed a well-defined clade related to A. pseudodeflectus based on sequence analysis of protein-coding regions. Morphological and physiological examination of these isolates indicated that they are able to grow above 37 degrees C, in contrast with A. ustus isolates, and give a positive Ehrlich reaction, in contrast with related species including A. granulosus, A. ustus, and A. pseudodeflectus. These isolates are proposed as a new species, A. calidoustus. Antifungal susceptibility testing showed that this species has decreased susceptibilities to several antifungal drugs. The triazoles are inactive in vitro, including the new azole posaconazole.
Upload full text
Use your RU credentials (u/z-number and password) tolog in with SURFconextto upload a file for processing by the repository team.