Fig. 4

Distributions of Opisthorchis viverrini antigen concentration in urine by urinary antigen ELISA at pre- and post-treatment with praziquantel in combined all 3 sites (A), KSN (B), MKM (C) and RET (D). Negative antigen groups were individuals with antigen concentration below 32.9 ng/ml in urine, light intensity groups were individuals with antigen concentration between 32.9–80.0 ng/ml in urine, moderate intensity groups were individuals with antigen concentration between 80.1–200.0 ng/ml, high intensity groups were individuals with antigen concentration > 80 ng/ml in urine. The bars represent the percent of participant in each concentration group at pre-(red) and post-treatment (yellow). KSN Kalasin, MKM Maha Sarakham, RET Roi Et