Autosomal dominant progressive retinal atrophy in Abyssinian cats

Hereditary progressive retinal atrophy in Abyssinian cats in England is recorded. It is compared with another hereditary retinopathy in the same breed in Sweden and it is concluded that these are two distinct conditions, one occurring at an early age in kittens with an autosomal dominant mode of inheritance, the other occurring in young adult cats due to an autosomal recessive gene. The two diseases are bilateral, progressive, and of the generalized type, and are similar ophthalmoscopically.