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Four new species of Talaromyces from clinical sources

Marcela Guevara-Suarez1, Deanna A Sutton2, Josepa Gené1

  • 1Unitat de Micologia, Facultat de Medicina i Ciències de la Salut and IISPV, Universitat Rovira i Virgili, Reus, Spain.

Mycoses
|June 30, 2017
PubMed

Insights

This study resolves the taxonomy of seven Talaromyces mold isolates from clinical samples. Multilocus sequence analysis and phenotypic data reveal four new species: Talaromyces alveolaris, T. georgiensis, T. minnesotensis, and T. rapidus.

Area of Science:

  • Mycology
  • Fungal Taxonomy
  • Molecular Biology

Background:

  • The genus Talaromyces includes molds commonly found in soil, indoor environments, and food.
  • Talaromyces was traditionally considered the teleomorphic state of Penicillium, but its taxonomy has evolved to include sexually and asexually reproducing species.
  • Previous studies identified Talaromyces, Penicillium, and Rasamsonia in clinical samples, with seven Talaromyces isolates remaining unidentified at the species level.

Purpose of the Study:

  • To resolve the taxonomic classification of seven previously unidentified Talaromyces isolates.
  • To describe and illustrate four new Talaromyces species based on comprehensive analysis.

Main Methods:

  • Multilocus sequence analysis using the internal transcribed spacer (ITS) region of rDNA, beta-tubulin (BenA), calmodulin (CaM), and RNA polymerase II second largest subunit (RPB2) genes.
  • Detailed phenotypic characterization of the fungal isolates.
  • Phylogenetic analysis to determine species relationships.

Main Results:

  • The taxonomic identity of seven Talaromyces isolates was resolved.
  • Four new species of Talaromyces were identified and described: Talaromyces alveolaris, Talaromyces georgiensis, Talaromyces minnesotensis, and Talaromyces rapidus.

Conclusions:

  • The study expands the known diversity within the genus Talaromyces.
  • Accurate identification of Talaromyces species is crucial for understanding their ecological roles and potential clinical significance.
Keywords:
PenicilliumTalaromycesclinical isolatesmolecular identificationtaxonomy

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