Fig. 6.

Percent change in mice body weights. Mice (n=6) were intranasally immunized with either saline, porcine reproductive and respiratory syndrome virus (PRRSV) antigen-only or antigen admixed with 10, 50 or 100 µg rLTB, on days 0, 7, and 21. Mice body weights were monitored at days 0, 7, 14, 21, and 28 post primary immunization. The changes in body weight were calculated as percent change in body weight, from weight on day 0. *P<0.05 and **P<0.01 versus the saline group.