A review of the diseases caused by Malassezia pachyde~natis has led to the
conclusion that the },east is an opportunistic pathogen that depends on
predisposing host factors and different immune suppressive mechanisms
for clinical manifestation. Until recently, the role of M. pachydermatis in
seborrhoeic dermatitis and otitis externa in dogs has been largely
unrecognized. The clinical manifestation, aetiology, diagnosis and treatment
of disease conditions in dogs caused by M. pachydermatis are
reviewed. Human Malasseziafmfur infections are briefly described.