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Int J Med Microbiol. 2011 Mar;301(3):260-6. doi: 10.1016/j.ijmm.2010.06.001. Epub 2010 Aug 12.

Molecular analysis and mating behaviour of the Trichophyton mentagrophytes species complex.

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  • 1Scientific Institute of Public Health, Mycology Aerobiology Section, Brussels, Belgium.


Isolates of the Trichophyton mentagrophytes complex vary phenotypically. Whether the closely related zoophilic and anthropophilic anamorphs currently associated with Arthroderma vanbreuseghemii have to be considered as members of the same biological species remains an open question. In order to better delineate species in the T. mentagrophytes complex, we performed a mating analysis of freshly collected isolates from humans and animals with A. benhamiae and A. vanbreuseghemii reference strains, in comparison to internal transcribed spacer (ITS) and 28S rDNA sequencing. Mating experiments as well as ITS and 28S sequencing unambiguously allowed the distinction of A. benhamiae and A. vanbreuseghemii. We have also shown that all the isolates from tinea pedis and tinea unguium identified as T. interdigitale based on ITS sequences mated with A. vanbreuseghemii tester strains, but had lost their ability to give fertile cleistothecia. Therefore, T. interdigitale has to be considered as a humanized species derived from the sexual relative A. vanbreuseghemii.

Crown Copyright © 2010. Published by Elsevier GmbH. All rights reserved.

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