This study evaluated the immune response of 47 (22 males, 25 females) captive maned wolves (Chrysocyon brachyurus) to modified-live canine parvovirus and canine distemper virus (Onderstepoort and Rockborn strains) vaccines. Sera were collected from 33 adults and 14 pups, including five free-ranging pups captured at 1 yr of age or younger. All the adults and four captive-born pups had been vaccinated prior to this first blood collection. Virus neutralization and hemagglutination-inhibition assays were performed for quantitating antibodies against canine distemper and canine parvovirus, respectively. Distemper antibody titers ≥100 were present in 57% of adults and 14% of pups. All adults and 29% of pups had parvovirus antibody titers ≥80. After vaccination, 72% of the wolves developed antibody titers ≥100 against distemper and 98% developed titers ≥80 against parvovirus. Both vaccines used were safe and immunogenic to juvenile and adult maned wolves, regardless of prior vaccination history.
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