No recent studies have evaluated the association between clinical signs of lower urinary tract disease (LUTD) and positive urine culture in dogs with diabetes mellitus. The aim of this study was to determine the prevalence of subclinical bacteriuria (i.e., positive urine culture without signs of LUTD) in dogs with diabetes mellitus.
One hundred seven dogs with diabetes mellitus were evaluated at a university veterinary hospital.
The relationship between the presence of signs of LUTD, pyuria and bacteriuria and urine culture results were compared using Fisher exact testing.
Results showed that 15 dogs (14%) had a positive urine culture via cystocentesis or free catch, of which 8 (53%) had pyuria, and 4 (27%) had signs of LUTD. Of the 88 dogs (82%) without signs of LUTD, 11 (13%) had a positive culture. A significant association was found between a positive urine culture and pyuria (OR infinity; 95% CI 20.34-infinity, P < .00001) and bacteriuria (OR infinity; 95% CI 164.4-infinity, P < .00001).
No association was found between urine culture results and signs of LUTD (OR 1.87; 95% CI 0.59-6.85, P = .46).
Researchers concluded that subclinical bacteriuria occurred in this cohort of dogs, and the findings reinforce the recommendation that urine cultures should not be routinely performed in diabetic dogs particularly if pyuria and bacteriuria are absent.
Valerie Nelson, et al. “Prevalence of signs of lower urinary tract disease and positive urine culture in dogs with diabetes mellitus: A retrospective study.” J Vet Intern Med. 2023 Jan 28. doi: 10.1111/jvim.16634.
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