Fig. 1From: Prevalence of bovine abortion, calf mortality, and bovine viral diarrhea virus (BVDV) persistently infected calves among pastoral, peri-urban, and mixed-crop livestock farms in central and Northwest EthiopiaHistogram of ear notch and serum sample AC-ELISA BVDV corrected optical density test results. Note: the area between the green and red vertical line (0.200 < corrected OP value <= 0.300) represents values that are suspect for BVDV antigen, values less than or equal to the green line (0.200) are negative and values greater than the red line (0.300) are considered positiveBack to article page