While treating prostate infections it has one major condition:
Doctors don't use the right combo of antibiotics, or they don't prescribe antibiotics long enough.
Prostate infections are extremely difficult to cure because antibiotics hard to penetrate prostate due to it structure, also hard to accumulate in high concentrations in the prostate. So most patients have to take appropriate antibiotics for many months. The best treatment appears to be a quinolone antibiotics group
http://en.wikipedia.org/wiki/Fluoroquinolone for several months, or a combination of particular antibiotics. UCLA research reports that 40% were cured, 20% were initially cured and then had a recurrence (perhaps because the partner was not treated), 21% were improved and only 21% had no improvement.
I know some men were prescribe by 6-9 month course of antibiotics to treat prostatitis, pill once a day to accumulate it in prostate and nearby areas.