Systemic antibodies administered by passive immunization prevent generalization of the infection by foot-and-mouth disease virus in cattle after oronasal challenge
The role of passively transferred sera in the protection against aerogenous foot-and-mouth disease (FMD) virus infection in cattle was evaluated using vaccine-induced immune serum preparations obtained at 7 and 26 days post-vaccination (dpv). We showed that circulating antibodies were sufficient to prevent disease generalization after oronasal infection in animals passively transferred with 26-dpv serum but not with the 7-dpv serum. Conversely, conventional FMD vaccination provided clinical protection at 7 dpv, promoting fast and robust antibody responses upon challenge and even though antibody titers were similar to those found in animals passively immunized with 7-dpv serum. These results demonstrate that presence of antigen-specific antibodies is critical to prevent the dissemination of the virus within the animal. Conventional FMD vaccination additionally promoted the deployment of rapid, high titer and isotype-switched antibody responses at systemic and mucosal levels after infection, thus conferring protection even in the presence of low pre-challenge antibody titers.
| Main Authors: | , , , , , , , , |
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| Format: | info:ar-repo/semantics/artículo biblioteca |
| Language: | eng |
| Published: |
2018-05
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| Subjects: | Ganado Bovino, Enfermedades de los Animales, Fiebre Aftosa, Anticuerpos, Inmunidad Pasiva, Cattle, Animal Diseases, Foot and Mouth Disease, Antibodies, Passive Immunity, |
| Online Access: | https://www.sciencedirect.com/science/article/pii/S0042682218300552 http://hdl.handle.net/20.500.12123/2540 https://doi.org/10.1016/j.virol.2018.02.012 |
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