Prostate Infections (cont.)
Prostate Infections Causes
Bacterial infections cause only about 5%-10% of cases of prostatitis. In the other 90%-95%, due to
chronic pelvic pain syndrome or asymptomatic inflammatory prostatitis described above, the cause is not known. Prostate infectious agents are as follows for both acute and chronic infectious prostatitis:
- Escherichia coli (E coli) is the bacterium most often the cause of prostate infections and approximately 80% of the bacterial pathogens are gram-negative organisms (for example,
Escherichia coli, Enterobacter, Serratia, Pseudomonas, Enterococcus, and
- Sexually transmitted disease-causing organisms also may cause infectious
prostatitis especially in sexually active men under 35 years of age; the most
usually identified organisms are Chlamydia, Neisseria, Trichomonas, and
- Rarely staphylococcal and streptococcal organisms have been found to be the
cause, and infrequently different organisms such as fungi, genital viruses, and
parasites have been implicated.
- The infectious agent (usually bacteria) may invade the prostate in two main
- The bacteria from a previous urethral infection move through prostatic
ducts into the prostate (occasionally termed retrograde infection).
- Movement of infected urine into the glandular prostate tissue can infect
via ejaculatory ducts (occasionally termed antegrade infection).
Infectious organisms, as previously stated, cause two of the four main types
of prostatitis; acute infectious prostatitis and chronic infectious prostatitis.
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