Trichophyton benhamiae as the causal agent of tinea faciei : the first case report in Malta

Abstract

Trichophyton benhamiae is an emerging zoonotic dermatophyte increasingly recognised as a cause of inflammatory mycosis in humans, particularly following contact with infected animals. We report the first documented case of T. benhamiae infection in Malta in an 8-year-old girl who presented with a single itchy annular patch on her right cheek. The patient had a recent history of close interaction with a symptomatic pet guinea pig, a known reservoir of this pathogen. Laboratory examination in the form of mycological culture and proteomic analysis by mass spectrometry confirmed the presence of T. benhamiae. The patient responded well to topical antifungal therapy. A few months later, three other cases of T. benhamiae infection were also identified in Malta highlighting the presence of an emerging dermatophyte causing inflammatory mycosis. This case underscores the diagnostic challenges associated with T. benhamiae, as its presentation often mimics that of more common dermatophytes, potentially leading to misdiagnosis or delayed treatment. Futhermore, increased awareness is essential to prevent the spread of zoonotic mycosis.