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Evaluation of techniques for diagnosis of canine prostatic diseases
Insights
Diagnostic tests for canine prostate disease reveal key findings: hemorrhage is common in hyperplasia, inflammation in prostatitis, and urine analysis is crucial for detecting infection. Semen and prostatic fluid cytology offer limited diagnostic value for bacterial prostatitis.
Area of Science:
- Veterinary Medicine
- Canine Urology
- Comparative Pathology
Background:
- Canine prostatic diseases, including hyperplasia, prostatitis, and neoplasia, are common.
- Accurate diagnosis relies on various clinical and laboratory findings.
- Understanding the utility of different diagnostic tests is essential for effective treatment.
Purpose of the Study:
- To evaluate the diagnostic value of semen analysis, prostatic fluid cytology, urinalysis, and blood leukocyte counts in dogs with prostatic diseases.
- To identify the most frequent abnormal findings associated with specific prostatic conditions.
Main Methods:
- Collected and analyzed specimens including semen, prostatic fluid washings, and urine from dogs with diagnosed prostatic hyperplasia, chronic prostatitis, or neoplasia.
- Performed bacterial cultures, cytology, urinalysis, and measured blood leukocyte counts.
- Correlated laboratory findings with clinical diagnoses.
Main Results:
- Hemorrhage was frequent in semen and prostatic fluid of dogs with hyperplasia.
- Inflammation was the primary finding in dogs with chronic prostatitis.
- Semen bacterial culture showed high sensitivity but low specificity for bacterial prostatitis due to contamination.
- Prostatic fluid washings were not effective for detecting bacterial prostatitis.
- Hematuria was common in hyperplasia and neoplasia; pyuria was frequent in prostatitis.
- Urine cultures were typically positive with prostatic infection.
- Blood leukocyte counts were generally normal in hyperplasia and neoplasia, but leukocytosis indicated abscessation.
Conclusions:
- Urinalysis and urine culture are valuable for diagnosing prostatic infections in dogs.
- Semen and prostatic fluid analyses have limitations in diagnosing specific prostatic conditions, particularly bacterial prostatitis.
- Blood leukocyte counts can indicate severe infections like abscessation but are not sensitive for milder infections.
Abstract:
Bacterial culture and cytology of semen, bacterial culture and cytology of prostatic fluid washings, urinalysis, bacterial culture of urine, and blood leukocyte counts were performed on specimens from dogs with prostatic hyperplasia, chronic prostatitis, or prostatic neoplasia. Hemorrhage was the most frequent abnormal finding in semen from dogs with prostatic hyperplasia. Inflammation was the most frequent abnormal finding in dogs with chronic prostatitis. Bacterial culture of semen was sensitive but not specific for chronic bacterial prostatitis, due to false-positive results from urethral contamination. Hemorrhage was the most frequent abnormal finding in prostatic fluid washings from dogs with prostatic hyperplasia. Inflammation was the most frequent abnormal finding in dogs with chronic prostatitis. Abnormal epithelial cells were found after prostatic massage in 4 dogs with neoplasia, although these cells were difficult to identify as neoplastic. Prostatic fluid washings were not useful for detecting chronic bacterial prostatitis, due to an inability to detect increases in bacterial counts in the fluid when urine bacterial counts were high. Hematuria was the predominant abnormal finding in urinalysis from dogs with hyperplasia and neoplasia. Pyuria was the most frequent abnormal finding in dogs with chronic prostatitis. Urine was usually culture-positive when there was prostatic infection. Blood leukocyte counts were normal in dogs with prostatic hyperplasia and usually normal in dogs with neoplasia. Leukocytosis, a left shift, and toxic white blood cells were predictive of abscessation, although the blood leukocyte count was not a very sensitive indicator for infection without abscessation.