ArticleMycopathologia2026
Hemolytic and Co-Hemolytic Activity of Trichophyton indotineae and Related Dermatophytes Isolated from Chronic and Recalcitrant Infections.
Article in Mycopathologia, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Who cites it
1 citing paper in PubMed.
- The natural history and evolution of dermatophytosis: Host immunity in acute and chronic infection.PLoS pathogens · 2026Article
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Authors and funding
5 authors.
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Abstract
Dermatophyte infections have evolved in both clinical presentation and etiological profiles, with chronic, recurrent, and widespread forms becoming increasingly prevalent and therapeutically challenging over the past decade. These infections are predominantly caused by Trichophyton indotineae (ITS genotype VIII), a member of the Trichophyton mentagrophytes complex. The virulence mechanisms of T. indotineae remain poorly understood. To elucidate potential pathogenic factors, we investigated hemolytic and co-hemolytic (CAMP-like) activities in dermatophytes associated with recalcitrant dermatophytosis. A total of 127 isolates (117 T. indotineae, 5 T. rubrum, 3 T. tonsurans, and 2 Microsporum canis) were examined using Columbia agar supplemented with 5% ovine (COA) or equine erythrocytes (CEA). Hemolysis was more consistently observed on COA (119 isolates) than on CEA (44 isolates) following 7-day incubation at 27 °C. Additional incubation at 36 °C up to 7 days was required to enhance hemolysis detection on CEA. Overall, 93.7% of isolates exhibited hemolytic activity, whereas only 3.1% demonstrated co-hemolytic activity. Among T. indotineae isolates, 97.4% were hemolytic. These findings underscore the importance of characterizing virulence traits in dermatophytes. Additional studies are needed to clarify the role of hemolysis in chronic and recalcitrant infections, with the goal of identifying novel therapeutic targets.
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