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The relationship between the preference of mating type (MAT) and source in the opportunistic pathogen Talaromyces

Qinglin Qu1,2, Sha Lu3, Zi Li4

  • 1Dermatology hospital, Southern Medical University, Guangzhou, China.

Medical Mycology
|March 17, 2023
PubMed

Insights

Talaromyces marneffei has mating types, with MAT1-2 alleles being more common. Mating type distribution varied by source, but virulence was independent of mating type and source in this study.

Area of Science:

  • Mycology
  • Genetics
  • Infectious Diseases

Background:

  • Talaromyces marneffei mating type locus function is unclear.
  • Potential recombination could influence antifungal resistance and virulence.

Purpose of the Study:

  • Determine mating type distribution in T. marneffei isolates.
  • Explore relationships between mating type, virulence, and isolate source.
  • Investigate potential clinical implications of mating type.

Main Methods:

  • PCR analysis for mating type gene distribution.
  • Correlation analysis between mating type and isolate sources (patients, animals, environment).
  • Drosophila melanogaster infection model to assess virulence.

Main Results:

  • Overabundance of MAT1-2 alleles observed across isolates.
  • Higher MAT1-1 ratio found in isolates from HIV-negative patients.
  • No significant virulence differences between MAT1-1 and MAT1-2 isolates in Drosophila model.
  • Virulence was independent of isolate source.

Conclusions:

  • T. marneffei isolates exhibit single mating type idiomorphs with unequal distribution.
  • MAT gene distribution appears linked to isolate source.
  • Fungal virulence is not dependent on mating type genotype or source.
Keywords:
Drosophila melanogasterTalaromyces marneffeimating typesexual cyclevirulence

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