FIG. 1.

(A) VN antibody titers in pools of sow serum, colostrum, and milk prepared from immunized sows (solid bars) and nonimmunized sows (open bars). (B) GMT of VN antibodies in serum of pigs at PID 0. Pigs received intraperitoneal injections of 60 ml of immune or control serum within 18 h of derivation. A subset of pigs received 15 ml of immune or control colostrum orally twice a day from 3 to 5 days of age and 25 ml of immune or control milk twice a day for another 7 days. Solid bars indicate titers in pigs inoculated with virulent Wa HRV at PID 0, and open bars indicate titers in pigs mock inoculated at PID 0. Columns labeled with an A differ significantly from those labeled with a B (one-way ANOVA of log-transformed VN titers followed by Duncan’s multiple-range test).