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Journal of Clinical Microbiology, October 2005, p. 5230-5237, Vol. 43, No. 10
0095-1137/05/$08.00+0     doi:10.1128/JCM.43.10.5230-5237.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

Trichophyton eboreum sp. nov. Isolated from Human Skin

Jochen Brasch1* and Yvonne Gräser2

Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Kiel, Germany,1 Institute of Microbiology and Hygiene, Charité, Berlin, Germany2

Received 5 March 2005/ Returned for modification 22 April 2005/ Accepted 4 July 2005

An unusual dermatophyte was isolated from the plantar scales of a human immunodeficiency virus-positive man with tinea pedis. Morphology, physiology, and molecular data provided evidence to support the new species Trichophyton eboreum. This dermatophyte is characterized by rapid growth on common mycological media, a flat powdery off-white colony, formation of clavate microconidia, smooth- and thin-walled cylindrical or club-shaped macroconidia with two to nine cells, the presence of hook-shaped hyphae, the production of cleistothecium-like structures and spiral hyphae in older cultures, positive hair perforation, the absence of pigmentation on potato glucose agar, the absence of a requirement for vitamins, a weak positive urease reaction, no growth at 37°C, resistance to 5% NaCl, resistance to fluconazole, good growth on human epidermal keratin, and the production of various enzymes on different media by the API-ZYM test. More than 5% divergence from any known species of dermatophyte was revealed by sequence analysis of the internal transcribed spacer of the rRNA gene.

* Corresponding author. Mailing address: Department of Dermatology, University of Schleswig-Holstein, Campus Kiel, Schittenhelmstr.7, D-24105 Kiel, Germany. Phone: 494315971507. Fax: 494315971611. E-mail: jbrasch{at}dermatology.uni-kiel.de.

Journal of Clinical Microbiology, October 2005, p. 5230-5237, Vol. 43, No. 10
0095-1137/05/$08.00+0     doi:10.1128/JCM.43.10.5230-5237.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.





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