Trichophyton species isolated from asymptomatic patients of the pet-owner pair in Mexico

Document Type : Short Communication


1 Laboratorio de Investigación en Patometabolismo Microbiano. Universidad Autonoma de Guerrero. Chilpancingo, Guerrero, México.

2 Laboratorio de Investigación en Parasitología. Universidad Autonoma de Guerrero. Chilpancingo, Guerrero, México.

3 Laboratorio de Microbiología Molecular y Biotecnología Ambiental. Universidad Autonoma de Guerrero. Chilpancingo, Guerrero, México.



Background and Purpose: Superficial mycoses are the fourth most common cause of disease worldwide. It is not surprising that zoonotic transmission occurs to humans due to close contact with different animals, be it companion or farm animals. Therefore, the objective of this study was to determine the presence of asymptomatic dermatophyte carriers in the owner-pet pairs, as well as identification of the most common etiologic agents and find the likely connection between an owner’s carrier status and the presence of dermatophytes in the respective pets.
Materials and Methods: From May 2019 to January 2020, 21 cats and 115 dogs with their respective owners were selected for dermatophyte culture. All the dogs and cats included in the study were from the communities of southeastern Mexico. The samples were taken with a cotton swab, which was vigorously rubbed and twisted on the pet's scalp or body four times and grown on Mycosel Agar. The isolates were identified from macroscopic and microscopic characteristics. The prevalence in terms of the binomial ranges from 0.73% in pet skin and human hands, to 2.2% in human scalp. In humans, the agents were Trichophyton tonsurans and T. verrucosum. In pets, a strain of Trichophyton sp was found.
Conclusion: Different species of dermatophytes were found in the owner/pet pairs, which denotes that coexistence is not related in asymptomatic cases.