Figure 3From: Diagnostic efficacy of monoclonal antibody based sandwich enzyme linked immunosorbent assay (ELISA) for detection of Fasciola gigantica excretory/secretory antigens in both serum and stoolLevel of Fasciola ES antigen detected in serum samples of different studied groups measured by sandwich ELISA (OD reading at 492 nm). The horizontal line represents the cut-off value of the assay (the lower detection limit). Dotted lines represent the mean OD value.Back to article page