KLK3 and schistosomiasis: Of the three hundred and sixty six participants, 198 (166 schistosomiasis negative and 32 schistosomiasis positive) had detectable prostate-specific antigen levels > 0 ng/mL ranged from 0.118 to 8.100 ng/mL with a mean of 0.8425 ± SD 1.249 ng/mL.