Psittacine beak and feather disease (PBFD) is a major viral disease in wild and captive psittaciformes all around the world. The disease was suspected in a 7 years old lesser sulphurcrested cockatoos (Cacatua sulphurea) with a minor feather loss at the back of neck and head. The bird was comprehensively examined by macroscopic pathology, histopathology and polymerase chain reaction (PCR). Marked intracellular edema of the keratinocytes and necrosis were evident in histopathological observation of dystrophic feather follicles. Numerous macrophages with cytoplasmic inclusions -botryoid- and Prevasculitis were also present in the dermis. Histopathologically, the feather lesions and inclusions were typical of PBFD. The presence of psittacine beak and feather disease virus (BFDV) DNA was confirmed by PCR. This is the first documented report of the occurrence of the PBFD in Iran.

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