Pusterla, N.; Vannucci, F.; Mapes, S.; Nogradi, N.; Collier, J.; Hill, J.; DiFrancesco, M.; White, A.; Akana, N.; Simonek, G.; Gebhart, C.
Efficacy of an avirulent live vaccine against Lawsonia intracellularis in the prevention of proliferative enteropathy in experimentally infected weanling foals