RAPD-based genotyping of Malassezia pachydermatis from Domestic and wild animals

Franciele Cristina Kagueyama, Danny Franciele Dias Moraes, Janaina Marcela Assunção Rosa, Alessandra Tammy Hayakawa Ito, Aline de Jesus da Silva, Gabriela Cardoso Batista, Luciano Nakazato, Valéria Dutra

Abstract


Malassezia pachydermatis (M. pachydermatis) is a fungus of importance in human and veterinary medicine. Although a part of the normal microbiota, it can sometimes be present in its pathogenic form, particularly causing otitis and dermatitis in animals. Among human beings, it mainly affects immune compromised patients and newborns, causing simple pustulosis, seborrheic dermatitis, tinea versicolor or fungemia. This study aimed to analyze the genomic polymorphism in M. pachydermatis samples isolated from Canis familiaris (domestic dog), Felis catus (domestic cat), and Myrmecophaga tridactyla (giant anteater). Two hundred and fourteen samples were collected and cultured in Sabouraud agar with chloranphenicol (100mg L-1) and incubated at 37 °C for a period of 7 to 10 days. One hundred and sixty six samples that appeared morphologically comparable to yeast cultures were processed for DNA extraction and PCR was performed for a specific region in the Internal Transcribed Spacer (ITS) of M. pachydermatis. Among these, seven (4.21%) were negative and 159 (95.79%) were positive. Of the 159 positive samples, 102 (64.15%) were from animals with clinical signs and 57 (35.85%) without clinical signs. Fifty-seven samples were selected at random for RAPD-PCR based genotyping and distributed into four genetic groups. Types I and II were more frequent in animals with clinical signs while type III was frequent in healthy animals. Type IV occurred evenly across animals with or without clinical signs. These results indicate differences in pathogenicity of the fungus based on the genotype.

Keywords


Malassezia pachydermatis; PCR; RAPD.

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DOI: http://dx.doi.org/10.5433/1679-0359.2016v37n5p3173

Semina: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433/1679-0359
E-mail: semina.agrarias@uel.br
Este obra está licenciado com uma Licença Creative Commons Atribuição-NãoComercial 4.0 Internacional