F Naeimipour - Department of Pathobiology, Faculty of Veterinary Specialized Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran
S. J Hashemi - Department of Mycology and Parasitology, Faculty of Public Health, Tehran University of Medical Sciences, Tehran, Iran
S Rezaie - Department of Mycology and Parasitology, Faculty of Public Health, Tehran University of Medical Sciences, Tehran, Iran
M Bayat - Department of Pathobiology, Faculty of Veterinary Specialized Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran

The keratinolytic activities of dermatophyte species are accompanied by the secretion of enzymes, such as serine proteases, which are coded by the Subtilisin (SUB) genes. This study aimed to determine the presence of the SUB genes in the clinical and nonclinical samples of Trichophyton verrucosum and Microsporum gypseum. Isolation was carried out by direct and laboratory examination. Following that, for the determination of the presence of the SUB gene, polymerase chain reaction with specific primers was conducted. The frequencies of the SUB gene were observed in almost ۶۶% of the isolates. Statistical analysis showed a significant relationship between the presence of the SUB gene and the samples collected from human, animals, and soil (p ˂۰.۰۰۵). The current investigation has been the first study of the presence/absence of the SUB gene in the clinical and nonclinical isolates of T. verrucosum and M. gypseum in Iran which may be a new step to perform further studies.

Dermatophyte, Microsporum gypseum, pathogenicity, SUB gene, Trichophyton verrucosum