Animals used in this study.

- = negative; + = positive; DJD = degenerative joint disease; F = female; FeLV = feline leukemia virus; FIV = feline immunodeficiency virus; GN = glomerulonephritis; IN = interstitial nephritis; M = male; n = neutered; n.d. = not determined; TD = tubular degeneration; Urea = urea concentration in fluid of anterior eye chamber (reference range < 50 mg/dl). * = urea nitrogen content was evaluated, but the value was excluded from the study due to an interval longer than 48 hours between death and necropsy. aCatarrhal enteritis resembling parvovirus infection morphologically (crypt dilation with accumulation of cellular debris, villous fusion and atrophy, and crypt regeneration). bBone marrow, lymph node, spleen, pituitary gland. cEnteritis due to infection with Salmonella typhimurium and Clostridium perfringens type A as detected by microbial investigation. Animals used in this study.