Photoreceptor Dysplasia: An Inherited Progressive Retinal Atrophy of Miniature Schnauzer Dogs

A progressive retinal atrophy (PRA) affecting Miniature Schnauzer dogs is reported. Of the 287 individuals (148 female, 139 male) comprising the study population, 66 (23 percent) were affected (33 female, 33 male) and 221 animals (115 female, 106 male) were phenotypically normal. There was no sex predilection for the disease. Results of histologic and electroretinographic studies indicate that the disease is a new and different type of PRA,...