There is considerable confusion about the effects of prostatitis syndr
omes on male reproductive physiology, Therefore, we correlated finding
s on seminal fluid and expressed prostatic secretions from 100 men att
ending a special prostatitis clinic. These men had symptoms:oi prostat
itis but no evidence of urethritis, acute or chronic bacterial prostat
itis, or significant urological abnormalities. Ail subjects were evalu
ated following a standardized protocol, including lower urinary tract
localization studies, expressed prostatic secretion analyses, and semi
nal fluid analyses with Bryan-Leishman staining. Seminal fluid finding
s were compared in men with inflammation (greater than or equal to 10(
6) leukocytes/ml) in their expressed prostatic secretions, i.e., nonba
cterial prostatitis, and men without inflammation in prostatic secreti
ons, i.e., prostatodynia. Of 23 men with inflammation (greater than or
equal to 10(6) leukocytes/ml) in their seminal fluid, 6 (26%) had non
bacterial prostatitis (mean leukocyte concentration 8.6 +/- 9.4 x 10(5
)/ml of semen) and 17 (74%) had prostatodynia (mean leukocyte concentr
ation 6.2 +/- 7.0 x 10(6)/ml, not significant). Of 77 men who did not
have seminal inflammation, 15 (19%) had nonbacterial prostatitis (mean
leukocyte concentration 0.1 +/- 0.2 x 10(6)/ml) and 62 (81%) had pros
tatodynia (mean leukocyte concentration 0.1 +/- 0.2 x 10(6)/ml, not si
gnificant). Men with nonbacterial prostatitis had lower values for sev
eral parameters associated with sperm motility, especially the proport
ion of motile sperm (45% compared with 60% for men with prostatodynia.
P = 0.08) and sperm subjective speed score (median 3 compared to 4 fo
r men with prostatodynia, P = 0.03). In summary, a minority of men had
seminal inflammation, even among men with nonbacterial prostatitis. T
here was poor correlation between inflammation in the prostatic secret
ions and in the semen, Nonbacterial prostatitis, bur. not seminal infl
ammation, was associated with reduced sperm motility. Our findings hig
hlight technical issues and the importance of investigating different
sites and samples, including the urethra, expressed prostatic secretio
ns, and seminal fluid.