Fig. 1.

Average daily weight gain (ADWG) of swine during the course of the study. Shown are ADWG and associated standard errors for each of the four groups for days −1–7 and days 7–13. Sham inoculated control swine (Group 1) and those challenged with VR-2332 (Group 4) gained weight at an expected rate for their age group. Group 2 swine challenged with HP-PRRSV strain rJXwn06 and their contacts (Group 3) lost body weight during the last week of the experiment. The ADWG for Group 2 on days −1–7 includes only 11 pigs, and on days 7–13 includes only 8 pigs. The body weights for the contact animals were taken on the same day as pigs in the other groups. Significance values are shown.