Both acute and chronic prostatitis can result from either the ascent of bacteria in the urethra, the reflux of infected urine, or the spread of bacteria from the rectum via the lymph nodes. Instrumentation (the process of spreading infection during procedures such as cystoscopy or urinary catheterization) is a less common cause. Prostatitis can also occur from sexual intercourse. Escherichia coli causes approximately 80% of bacterial prostatitis. Other common bacteria that are involved include pseudomonas, klebsiella, proteus, Serratia, and Enterobacter. The cause of prostatodynia is uncertain.

782 Prostatitis

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