Fig. 2

Time course of antibody responses to SVA VP1, VP2, and VP3. Serum samples collected from sows at the onset of clinical signs until 60 days later were tested in duplicate wells coated with 500 ng of each antigen. Negative control serum (Neg) was from a matched SVA-negative farm. Results are shown as a box whisker plot using the Tukey method for outliers for (a) VP1, (b) VP2, and (c) VP3 proteins. The suspect positive OD range is shown as a grey bar with negatives below and positives above the bar