Stomatitis, pharyngitis and tonsillitis caused by Malassezia pachydermatisin a dog

A case of oropharyngitis caused by Malassezia pachydermatis in a 3-year-old male Cocker Spaniel is reported. Recurrent episodes of pharyngitis were tr eated with antibacterial antibiotics; when a final treatment after tooth ex traction was unsuccessful, the dog was admitted to the clinic at the Depart ment of Microbiology and Infectious Diseases at the Veterinary Faculty, Uni versity of Zagreb. Bacteriological culture of enlarged tonsils revealed a m ixed culture of Streptococcus sp., Staphylococcus sp. and Pasteurella sp. D uring antibacterial treatment with amoxicillin plus clavulanic acid and met ronidazole, lesions appeared in the oral cavity and mycological examination of the lesions and enlarged tonsils revealed a pure culture of M. pachyder matis. The patient was treated with ketoconazole, 10 mg kg(-1) twice daily for 7 days when the lesions resolved. M. pachydermatis strains from the mou th and from various sites on the dog's body had identical protein patterns and DNA profiles which differed from strains from other animals.