A severe outbreak of highly virulent and multi-resistant dermatophytosis by species in the Trichophyton mentagrophytes/T. interdigitale complex is ongoing in India. The correct identity of the etiologic agent is a much-debated issue. In order to define species limits, a taxonomic study was undertaken combining molecular, morphological, and physiological characteristics as evidence of classification. Molecular characteristics show that T. mentagrophytes s. str. and T. interdigitale s. str. can be distinguished with difficulty from each other, but are unambiguously different from the Indian genotype, T. indotineae by sequences of the HMG gene. The entities were confirmed by multilocus analysis using tanglegrams. Phenotypic characters of morphology and physiology are not diagnostic, but statistically significant differences are observed between the molecular siblings. These properties may be drivers of separate evolutionary trends. Trichophyton mentagrophytes represents the ancestral, homothallic cloud of genotypes with a probable geophilic lifestyle, while T. indotineae and T. interdigitale behave as anthropophilic, clonal offshoots. The origin of T. indotineae, which currently causes a significant public health problem, is zoonotic, and its emergence is likely due to widespread misuse of antifungals.

须毛癣菌/ T中物种严重爆发的高毒力和多重耐药性皮肤癣菌病。印度正在发生指间复合体。病原体的正确身份是一个备受争议的问题。为了定义物种限制，结合分子、形态和生理特征作为分类证据进行了分类学研究。分子特征表明T. mentagrophytes s。海峡和T. interdigitale s.海峡很难相互区分，但与印度基因型T明显不同。 indotineae的 HMG 基因序列。这些实体通过使用缠结图的多位点分析进行了确认。形态学和生理学的表型特征不能用于诊断，但在分子兄弟之间观察到统计学上显着的差异。这些特性可能是不同进化趋势的驱动因素。须毛癣菌代表了祖先的同宗基因型云，具有可能的亲土生活方式，而毛癣菌则代表了可能具有亲土生活方式的基因型。 indotineae和T .指间动物表现为亲人的、克隆的分支。 T的起源。 indotineae是目前造成严重公共卫生问题的一种人畜共患疾病，其出现很可能是由于抗真菌药物的广泛滥用所致。