Comparison of two sample collection methods for quantitative bacteriologic culture of canine prostatic fluid

Gerald V. Ling From the Departments of Medicine (Ling, Johnson), Radiological Sciences (Nyland, Hager), and Pathology (Kennedy), School of Veterinary Medicine, University of California, Davis, CA 95616.

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Thomas G. Nyland From the Departments of Medicine (Ling, Johnson), Radiological Sciences (Nyland, Hager), and Pathology (Kennedy), School of Veterinary Medicine, University of California, Davis, CA 95616.

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Peter C. Kennedy From the Departments of Medicine (Ling, Johnson), Radiological Sciences (Nyland, Hager), and Pathology (Kennedy), School of Veterinary Medicine, University of California, Davis, CA 95616.

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David A. Hager From the Departments of Medicine (Ling, Johnson), Radiological Sciences (Nyland, Hager), and Pathology (Kennedy), School of Veterinary Medicine, University of California, Davis, CA 95616.

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Deedra L. Johnson From the Departments of Medicine (Ling, Johnson), Radiological Sciences (Nyland, Hager), and Pathology (Kennedy), School of Veterinary Medicine, University of California, Davis, CA 95616.

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Summary

Ejaculate, urine, urethral swab specimens, and ultrasonography-guided small-needle prostatic cyst aspiration and/or tissue core biopsy specimens were collected for bacteriologic culture from 25 dogs in which prostatic disease was suspected on the basis of history, clinical signs of disease, or results of physical examination. The prostate gland in each dog was examined ultrasonographically, and the tissue core biopsy specimens were examined histologically and bacteriologically.

Two methods were used to assess bacterial prostatitis. In 5 dogs (20%), bacteriologic culture results of paired urethral swab and ejaculate specimens differed from culture results of specimens obtained by needle aspiration of prostatic cyst fluid or tissue core biopsy.

The prostate gland in 17 dogs had 1 or more cystic, fluid-filled structures (0.5 to 4.0 cm in diameter). Ultrasonographic appearance of the prostate gland did not have obvious correlation with culture results from dogs of the study. Histologic results of prostatic tissue core biopsy specimens correlated well with culture results.

Summary

Ejaculate, urine, urethral swab specimens, and ultrasonography-guided small-needle prostatic cyst aspiration and/or tissue core biopsy specimens were collected for bacteriologic culture from 25 dogs in which prostatic disease was suspected on the basis of history, clinical signs of disease, or results of physical examination. The prostate gland in each dog was examined ultrasonographically, and the tissue core biopsy specimens were examined histologically and bacteriologically.

Two methods were used to assess bacterial prostatitis. In 5 dogs (20%), bacteriologic culture results of paired urethral swab and ejaculate specimens differed from culture results of specimens obtained by needle aspiration of prostatic cyst fluid or tissue core biopsy.

The prostate gland in 17 dogs had 1 or more cystic, fluid-filled structures (0.5 to 4.0 cm in diameter). Ultrasonographic appearance of the prostate gland did not have obvious correlation with culture results from dogs of the study. Histologic results of prostatic tissue core biopsy specimens correlated well with culture results.

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