3Van Heerden J,Bingham J, van Vuuren M, et al. Clinical and serological response of wild dogs to vaccination against canine distemper, canine parvovirus infection and rabies [J]. J S Afr Vet Assoc, 2002, 73(1):8-12.
4Pratelli A, Cavalli A, Martella V, et al. Canine parvovirus vaccination:comparison of neutralizing antibody responses in pups after inoculated with CPV2 or CPV2b modified live virus vaccine [J]. Clin Diagn Lab Immunol, 2001:8(3):612-615.
