New and Emerging Dermatophytes - 29/09/26

Doi : 10.1016/j.det.2026.08.008

Irene Quan, BA ^a,^{^{1
Co-first author.}}, Irina M. Kasarskis, DrPH, MPH ^b,^c,^{^{1
Co-first author.}}, Andrew Williams, MS ^d, Kyle Mueller, BA ^e, Laura A.S. Quilter, MD, MPH ^f, John Trinidad, MD, MPH ^g, Esther Freeman, MD, PhD ^g, Jason Zucker, MD ^h, Jeremy A.W. Gold, MD, MS ^c,^{^{2
Co-last author.}}, Avrom S. Caplan, MD ^i,^{^{2
Co-last author.},}^⁎

^a Department of Dermatology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA

^b Epidemic Intelligence Service, Centers for Disease Control and Prevention (CDC), Atlanta, GA, USA

^c Division of Infectious Diseases, Department of Medicine, Columbia University Irving Medical Center, New York, NY, USA

^d Mycotic Diseases Branch, Division of Foodborne, Waterborne, and Environmental Diseases, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention (CDC), Atlanta, GA, USA

^e Upstate Medical University, Syracuse, NY, USA

^f Jacobs School of Medicine and Biomedical Sciences, Buffalo, NY, USA

^g Division of STD Prevention, Centers for Disease Control and Prevention (CDC), Atlanta, GA, USA

^h Department of Dermatology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA

ⁱ The Ronald O. Perelman Department of Dermatology, NYU Grossman School of Medicine, NYU Langone Health, New York, NY, USA

^∗ Corresponding author. The Ronald O. Perelman Department of Dermatology, 222 East 41st street, 16th Floor, New York, NY 10017. The Ronald O. Perelman Department of Dermatology 222 East 41st street 16th Floor New York NY 10017

En prensa. Pruebas corregidas por el autor. Disponible en línea desde el Tuesday 29 September 2026

Resumen

Emerging dermatophytes, particularly Trichophyton indotineae and Trichophyton mentagrophytes genotype VII (TMVII), are reshaping the epidemiology of dermatophytosis through increasing treatment-refractory disease and transmission via skin-to-skin contact, including intimate or sexual contact. This article summarizes the epidemiology, clinical presentation, diagnosis, and management of these pathogens, with emphasis on distinguishing features relevant to clinical practice and a brief overview of emerging treatment resistance in Trichophyton rubrum . We also discuss diagnostic limitations, antifungal stewardship, infection prevention, and surveillance gaps. Increased clinician awareness and expanded access to molecular diagnostics are critical to improving outcomes and limiting transmission.

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Keywords : Dermatophytosis, T indotineae , T mentagrophytes genotype VII , TMVII, Sexually transmitted infections, Emerging infections, Antifungal stewardship, Antifungal susceptibility