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Autochthonous transmission of Trichophyton indotineae through sexual contact, France, 2024

Arnaud Jabet1,2, Thibault Chiarabini3, Christophe Hennequin4

  • 1Service de Parasitologie-Mycologie, Hôpital Saint-Antoine, Assistance Publique-Hôpitaux de Paris (AP-HP), Paris, France.

Euro Surveillance : Bulletin Europeen Sur Les Maladies Transmissibles = European Communicable Disease Bulletin
|July 4, 2025
PubMed

Insights

Trichophyton indotineae, a terbinafine-resistant fungus, is spreading sexually in Europe. This difficult-to-diagnose dermatophyte highlights new transmission risks beyond its native regions.

Area of Science:

  • Medical Mycology
  • Infectious Diseases
  • Dermatology

Background:

  • Trichophyton indotineae is an emerging dermatophyte species.
  • It is associated with terbinafine resistance.
  • Initially described in South-Asian and Middle-Eastern countries, it is difficult to diagnose.

Purpose of the Study:

  • To report cases of sexually transmitted dermatophytosis caused by T. indotineae.
  • To highlight the spread of this pathogen in Europe.

Main Methods:

  • Case reporting.
  • Clinical diagnosis of dermatophytosis.
  • Identification of T. indotineae.

Main Results:

  • Four cases of sexually transmitted dermatophytosis caused by T. indotineae were identified in Europe.
  • Cases involved two female sex-workers (including one transgender woman) and two men who have sex with men.
  • All infections were acquired in Europe, indicating transmission outside endemic areas.

Conclusions:

  • Trichophyton indotineae can cause sexually transmitted infections.
  • Sexual contact is a potential route for the spread of T. indotineae in non-endemic areas.
  • Increased awareness and diagnostic efforts are needed for this emerging pathogen.
Keywords:
Trichophytonitraconazolesexually transmitted diseasesterbinafinetinea

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