Table 1.

The NIH prostatitis classification

Category	Designation	Status of infection
I	Acute bacterial prostatitis	Acute infection of prostate
II	Chronic bacterial prostatitis	Recurrent infection of prostate
III	Chronic non-bacterial prostatitis/Chronic pelvic pain syndrome (CPPS)	No demonstrable infection
IIIA	Inflammatory	WBC in semen/EPS/post-prostatic massage urine
IIIB	Non-inflammatory	No WBC in semen/EPS/post-prostatic massage urine
IV	Asymptomatic inflammatory prostatitis	Asymptomatic

WBC - white blood cell, EPS - expressed prostatic secretion