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Vet Microbiol. 2005 Jul 1;108(3-4):291-6.

Genetic typing of Malassezia pachydermatis from different domestic animals.

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Grup de Micologia Veterinària, Departament de Sanitat i d'Anatomia Animals, Facultat de Veterinària, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Barcelona, Spain.


In the present study, random amplification of polymorphic DNA, which detects DNA polymorphism in fungal genomic DNA, was applied for genetic typing of Malassezia pachydermatis isolates. Fifty-five isolates from different domestic animals and body sites and the neotype strain CBS 1879 were characterized. Primers M13 and OPT-20 were used to analyse their genetic relatedness and similarity. This technique allowed us to distinguish four different genetic types. The predominant genetic type was observed in isolates recovered from different anatomical locations in all animals. It was the only genetic type found in cats, horse, goat and pig. The other three genetic types were observed only in isolates from external ear canals of dogs. Types II and IV were only recovered from external otitic ears and type III from healthy ears. An animal was colonised by more than one type of M. pachydermatis and different genetic types were detected in the same body site. Some genetic types were only isolated from diseased skin.

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