Ivana Indikova, Karin Loydl, Angelika Stary
Outpatient´s Centre for Diagnosis of Infectious Venero-Dermatological Diseases, Vienna, Austria

Background
The zoophilic fungus Trichophyton (T.) species of Arthroderma (A.) benhamiae is a causative agent of inflammatory dermatophytosis in children and adolescents. The carrier are small rodents, especially guinea pigs. The infection can be transmitted to humans by direct skin contact with an infected animal, and can be further spread to other humans. Besides tinea corporis and tinea manus, T. species of A. benhamiae can cause tinea capitis and tinea facei. A 9 years old boy was recommended to the Outpatients Centre for Fungal Infections in Vienna because of deep putride lesions on the scalp, combined with loss of hair.

Methods
Mycological diagnosis of the skin scraping and the hair was performed based on macroscopic and microscopic examination of fungal cultures on Sabouraud plates. The identification of fungal elements demonstrated T. species of A. benhamiae

Results
In the Outpatient´s Centre in Vienna, 905 cases of Tinea corporis and Tinea capitis were diagnosed from 2016 to 2019. M. canis was identified in 802 (92%) and T. species of A. benhamiae in 103 (8%) patients, respectively, as the causative agent.. Of the 103 cases, 79 had lesions on the corpus, 15 on the capillitium and 9 on the facies. A special case with Tinea capitis will be presented to illustrate the aggressive progression of the disease, the necessity of professional diagnosis and final successful treatment.

Conclusion
Early diagnosis of dermatophytosis as the causative agent of lesions on the scalp and the identification of the source of infection is necessary for a successful therapy in patients and family members.

 

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