Duration of immunity against heterologous porcine parvovirus 1 challenge in gilts immunized with a novel subunit vaccine based on the viral protein 2

摘要

Study design. A total of 46 gilts were randomized into 6 groups and enrolled into the study performed in two phases. Animals from phase I (basic vaccination scheme) were challenged at SD 202 whereas animals from phase II (re-vaccination scheme) were challenged at SD 385. The study ended at 90 days of gestation of the gilts, when their fetuses were collected for evaluation