Trends in the frequency of calcium oxalate uroliths in the upper urinary tract of cats.

Medical records from cats diagnosed with uroliths at nine United States veterinary teaching hospitals from 1980 to 1999, and records of cats with uroliths submitted for analyses to the Minnesota Urolith Center from 1981 to 2000, were evaluated. A 10-fold increase in frequency of upper tract uroliths occurred in cats during the 20-year interval at the nine veterinary teaching hospitals. Calcium oxalate emerged as the predominant mineral type in upper tract uroliths, having increased more than 50-fold during the study period.

Effects of storage time and temperature on pH, specific gravity, and crystal formation in urine samples from dogs and cats.

Objective: To determine effects of storage temperature and time on pH and specific gravity of and number and size of crystals in urine samples from dogs and cats.

Design: Randomized complete block design.

Animals: 31 dogs and 8 cats.

Associations between dry dietary factors and canine calcium oxalate uroliths.

Objective: To identify factors in dry diets associated with the occurrence of calcium oxalate (CaOx) uroliths in dogs.

Animals: 600 dogs with CaOx uroliths and 898 dogs without urinary tract diseases.

Procedure: Univariate and multivariate logistic regression were performed.

Associations between dietary factors in canned food and formation of calcium oxalate uroliths in dogs.

Objective: To identify dietary factors in commercially available canned foods associated with the development of calcium oxalate (CaOx) uroliths in dogs.

Animals: 117 dogs with CaOx uroliths and 174 dogs without urinary tract disease.

Procedure: Case dogs were those that developed CaOx uroliths submitted to the Minnesota Urolith Center for quantitative analysis between 1990 and 1992 while fed a commercially available canned diet.