Clinical and pathological aspects of 'going light' in exhibition budgerigars (Melopsittacus undulatus).
'Going light' is a chronic but eventually fatal disease of budgerigars. Clinically the only consistent features are weight loss while maintaining a good food intake. The signs are caused by enteritis typified by lymphocyte and plasma cell infiltration and associated villous atrophy leading to a malabsorption syndrome.
D000818:Animals; D001715:Bird Diseases / Q000175:diagnosis* / Q000473:pathology; D001717:Birds; D001835:Body Weight; D004751:Enteritis / Q000473:pathology / Q000662:veterinary; D005260:Female; D007422:Intestines / Q000473:pathology; D008297:Male