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Dermatophytosis Due to Trichophyton verrucosum and T. mentagrophytes

Ali Rezaei-Matehkolaei*

Department of Medical Mycology, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran

*Corresponding Author:
Ali Rezaei-Matehkolaei
Department of Medical Mycology
School of Medicine, Ahvaz Jundishapur University of Medical Sciences
Ahvaz, IR, Iran
Tel: +98 611 3330074
E-mail: [email protected]

Received: September 30, 2015; Accepted: November 23, 2015; Published: November 26, 2015

Citation: Rezaei-Matehkolaei A (2015) Dermatophytosis Due to Trichophyton verrucosum and T mentagrophytes. Dermatol Case Rep 1:101. doi:10.4172/DMCR.1000101

Copyright: © 2015 Rezaei-Matehkolaei A. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Abstract

Here, I wish to comment that the taxonomy x of dermatophytes has recently been revolutionized and a new taxonomy was internationally established [1]. Indeed, to update the mycologic data in all aspects of dermatophytosis the new taxa should be considered. Our recent sequencebased investigations in Iran [2,3] and some unpublished data obviously indicate that currently most of the strains morphologically identified as T. verrucosum are, in fact, T. verrucosum var. autotrophicum (Figure 1) which recently regarded to be conspecific with T. interdigitale [1]. Additionally, almost all entities phenotypically quoted as T. mentagrophytes are actually the old taxa of T. mentagrophytes var. mentagrophytes or var. granulosum which currently synonymized with T. interdigitale species [1,4].

Letter to the Editor

Here, I wish to comment that the taxonomy xof dermatophytes has recently been revolutionized and a new taxonomy was internationally established [1]. Indeed, to update the mycologic data in all aspects of dermatophytosis the new taxa should be considered. Our recent sequence based investigations in Iran [2,3] and some unpublished data obviously indicate that currently most of the strains morphologically identified as T. verrucosum are, in fact, T. verrucosum var. autotrophicum (Figure 1) which recently regarded to be conspecific with T. interdigitale [1]. Additionally, almost all entities phenotypically quoted as T. mentagrophytes are actually the old taxa of T. mentagrophytes var. mentagrophytes or var. granulosum which currently synonymized with T. interdigitale species [1,4]. Likewise, according to the biological and molecular findings, today it is known that T. mentagrophytes sp. is synonymous only with the zoophilic variants and species formerly recognized as T. mentagrophytes var. quinckeanum, T. langeronii and T. sarkisovii. Regarding to the issues under comments, the actual prevalence of T. verrucosum, T. mentagrophytes and T. interdigitale species in many recently published studies is questionable. To realize any change in the distribution pattern of dermatophytes, DNA-based procedures and new classification must be considered.

dermatology-case-reports-dermatophyte-strains

Figure 1: The colony appearance of four dermatophyte strains that morphologically were reported as Trichophyton verrucosum but sequencing specified them as T. interdigitale

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Review summary

  1. Thomas
    Posted on Jul 27 2016 at 1:24 pm
    This letter was written to draw attention towards the fact that correct identification of dermatophytes still remains problematic, especially concerning the intraspecies differentiation. The molecular research data is discussed that provides useful insights into the phylogeny and taxonomy of these fungi to overcome the difficulties with conventional diagnostics. The authors also discuss the advantages and disadvantages of the DNA-based procedures including better distribution pattern of dermatophytes and update of the mycological data.
 

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