Malassezia pachydermatis   Malassezia pachydermatis biotype 111, showing susceptibility to all killer yeasts (K1 to K9). Photograph obtained from: S Dall´Acqua Coutinho, C Rodrigues Paula. Biotyping of Malassezia pachydermatis strains using the killer system. Rev Iberoam Micol 1998; 15: 85-87. Malassezia pachydermatis culture in YMA. GRAM stain of Malassezia pachydermatis. Photograph obtained from: FM Bernardo, HM Maryins, ML Martins. A survey of mycotic otitis externa of dogs in Lisbon. Rev Iberoam Micol 1998; 15: 163-165.