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J Med Microbiol 55 (2006), 1583-1586; DOI: 10.1099/jmm.0.46665-0
© 2006 Society for General Microbiology
ISSN 1473-5644

Case Report

Canine dermatophytosis caused by an anthropophilic species: molecular and phenotypical characterization of Trichophyton tonsurans

R. S. N. Brilhante1,4, R. A. Cordeiro1,3,4, J. M. F. Gomes2, J. J. C. Sidrim1 and M. F. G. Rocha1,2

1 ,4 Department of Pathology and Legal Medicine, School of Medicine, Medical Mycology Specialized Center1 , and Post-Graduation Program in Medical Sciences4 , Federal University of Ceará, Fortaleza-CE, Brazil

2 ,3 School of Veterinary Medicine, Post-Graduation Program in Veterinary Science2 , and Department of Biological Science3 , State University of Ceará, Fortaleza-CE, Brazil

Correspondence
R. S. N. Brilhante
samianogueira{at}hotmail.com

Received 6 April 2006
Accepted 13 July 2006

Microsporum canis is the most common species isolated from canine and feline dermatophytosis in the world. However, this study reports a rare case of canine dermatophytosis caused by the anthropophilic dermatophyte Trichophyton tonsurans in the city of Fortaleza, Ceará, Brazil. The fungal characterization was performed by classical mycological examination and by genotypical analysis using the restriction enzymes Sau3A, RsaI, DdeI and EcoRI. The phenotypical characteristics were compatible with T. tonsurans. The results obtained in the genotypical analysis were similar to the digestion pattern of the ITS sequences for T. tonsurans strains. In addition, an antifungal susceptibility test was performed with griseofulvin, ketoconazole and itraconazole. The MICs were 0.5 µg ml–1 for griseofulvin, 0.25 µg ml–1 for ketoconazole and 1 µg ml–1 for itraconazole. This study emphasizes the adaptability of anthropophilic fungi such as T. tonsurans to animal conditions.






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