Re-examination of species limits in Aspergillus section Flavipedes using advanced species delimitation methods and description of four new species
Status PubMed-not-MEDLINE Language English Country Netherlands Media electronic-ecollection
Document type Journal Article
PubMed
35003383
PubMed Central
PMC8688885
DOI
10.1016/j.simyco.2021.100120
PII: S0166-0616(21)00007-5
Knihovny.cz E-resources
- Keywords
- Antifungal susceptibility testing, Aspergillus alboluteus F. Sklenar, Jurjević, Ezekiel, Houbraken & Hubka, Aspergillus alboviridis J.P.Z. Siqueira, Gené, F. Sklenar & Hubka, Aspergillus flavipes, Aspergillus inusitatus F. Sklenar, C. Silva Pereira, Houbraken & Hubka, Aspergillus lanuginosus F. Sklenar & Hubka, Clinical fungi, Indoor fungi, Multigene phylogeny, Soil-borne fungi, Species delimitation,
- Publication type
- Journal Article MeSH
Since the last revision in 2015, the taxonomy of section Flavipedes evolved rapidly along with the availability of new species delimitation techniques. This study aims to re-evaluate the species boundaries of section Flavipedes members using modern delimitation methods applied to an extended set of strains (n = 90) collected from various environments. The analysis used DNA sequences of three house-keeping genes (benA, CaM, RPB2) and consisted of two steps: application of several single-locus (GMYC, bGMYC, PTP, bPTP) and multi-locus (STACEY) species delimitation methods to sort the isolates into putative species, which were subsequently validated using DELINEATE software that was applied for the first time in fungal taxonomy. As a result, four new species are introduced, i.e. A. alboluteus, A. alboviridis, A. inusitatus and A. lanuginosus, and A. capensis is synonymized with A. iizukae. Phenotypic analyses were performed for the new species and their relatives, and the results showed that the growth parameters at different temperatures and colonies characteristics were useful for differentiation of these taxa. The revised section harbors 18 species, most of them are known from soil. However, the most common species from the section are ecologically diverse, occurring in the indoor environment (six species), clinical samples (five species), food and feed (four species), droppings (four species) and other less common substrates/environments. Due to the occurrence of section Flavipedes species in the clinical material/hospital environment, we also evaluated the susceptibility of 67 strains to six antifungals (amphotericin B, itraconazole, posaconazole, voriconazole, isavuconazole, terbinafine) using the reference EUCAST method. These results showed some potentially clinically relevant differences in susceptibility between species. For example, MICs higher than those observed for A. fumigatus wild-type were found for both triazoles and amphotericin B for A. ardalensis, A. iizukae, and A. spelaeus whereas A. lanuginosus, A. luppiae, A. movilensis, A. neoflavipes, A. olivimuriae and A. suttoniae were comparable to or more susceptible as A. fumigatus. Finally, terbinafine was in vitro active against all species except A. alboviridis.
Department of Botany Faculty of Science Charles University Prague Czech Republic
Department of Clinical Medicine University of Copenhagen Copenhagen Denmark
Department of Clinical Microbiology Rigshospitalet Copenhagen Denmark
Department of Microbiology Babcock University Ilishan Remo Ogun State Nigeria
EMSL Analytical Cinnaminson NJ USA
Medical Mycology Research Center Chiba University Chuo ku Chiba Japan
Unit of Mycology Statens Serum Institut Copenhagen Denmark
Westerdijk Fungal Biodiversity Institute Utrecht the Netherlands
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