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Recurrent UTIs in dogs - which underlying diseases are important?
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Urinary tract infections (UTIs) are common in dogs, and often there is a primary disease which predisposes to this problem and needs to be corrected or treated. Dogs with endocrine diseases, especially with hyperadrenocorticism, diabetes mellitus or both, are on very high risk -and urinary cultures on a regular base are highly recommended since the urinalysis often is normal!
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A retrospective study was performed to determine the proportion of dogs with hyperadrenocorticism or diabetes mellitus or both that had urinary tract infection (UTI) and to describe clinical and laboratory findings.
Dogs with these endocrine disorders were included if results of quantitative urine culture were available and dogs were not receiving antimicrobials.
Dogs with positive urine cultures were considered to have UTI and dogs with negative urine cultures were used as controls.
Information including history, clinical signs, physical examination findings, and results of laboratory tests and urine culture was extracted from all records.
Findings in dogs with UTI were compared with control dogs.
There were 101 dogs with hyperadrenocorticism or diabetes mellitus or both that met inclusion criteria; 42 (41.6%) had UTI and 59 (58.4%) did not.
UTI was present in 46% of dogs with hyperadrenocorticism, 37% of dogs with diabetes mellitus, and 50% of dogs with both endocrine disorders.
There was no association between endocrine group and occurrence of UTI.
Escherichia coli was the most common bacteria isolated, and cultures from 29 dogs (69%) showed growth of this organism.
Of dogs with UTI, <5% had stranguria, pollakiuria, or discolored urine, whereas 60% had pyuria and 69% had bacteriuria. W
We conclude that UTIs are common in dogs with hyperadrenocorticism, diabetes mellitus, or both diseases.
Clinical signs of UTI, however, are uncommon and results of urinalysis may be normal.
Therefore, it is appropriate to recommend urine culture as part of the evaluation of dogs with these endocrine disorders.
Source: Forrester SD, Troy GC, Dalton MN, Huffman JW, Holtzman G. (1999): Retrospective evaluation of urinary tract infection in 42 dogs with hyperadrenocorticism or diabetes mellitus or both.
In: J Vet Intern Med. 1999 Nov-Dec;13(6):557-60.
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