Figure 7From: Characterization of two Austrian porcine reproductive and respiratory syndrome virus (PRRSV) field isolates reveals relationship to East Asian strains Antibody response to PRRSV infection. ELISA IDEXX X3 results as a ratio of the optical density (OD) of the sample and the OD of the positive control for infected groups at −7, 7, 10 and 13 dpi. Values over the cut-off at 0.4 (dotted line) were regarded as positive. Whiskers represent maximum and minimum values.Back to article page