Immune responses of pigs to commercialized emulsion FMD vaccines and live virus challenge

Abstract The immune response to structural and non-structural proteins (NSPs) was studied on sequential serum samples in swine from O/Taiwan/97 FMDV challenge studies, outbreaks and after vaccination. The results showed that pigs vaccinated with a commercial vaccine prior to or after infection maint...

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Veröffentlicht in:Vaccine 2007-05, Vol.25 (22), p.4464-4469
Hauptverfasser: Chen, S.P, Lee, M.C, Sun, Y.F, Cheng, I.C, Yang, P.C, Lin, Y.L, Jong, M.H, Robertson, I.D, Edwards, J.R, Ellis, T.M
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container_end_page 4469
container_issue 22
container_start_page 4464
container_title Vaccine
container_volume 25
creator Chen, S.P
Lee, M.C
Sun, Y.F
Cheng, I.C
Yang, P.C
Lin, Y.L
Jong, M.H
Robertson, I.D
Edwards, J.R
Ellis, T.M
description Abstract The immune response to structural and non-structural proteins (NSPs) was studied on sequential serum samples in swine from O/Taiwan/97 FMDV challenge studies, outbreaks and after vaccination. The results showed that pigs vaccinated with a commercial vaccine prior to or after infection maintained high neutralizing antibody titers with gradual decline from peak titers over the duration of this study. However, neutralizing antibody titers in non-vaccinated pigs only reached moderate levels 2–4 weeks post infection and remained low thereafter. For the 3B and 3ABC NSP antibody ELISA responses, there were gradually decreasing levels of NSP antibody over time. In multiple vaccinations, all pigs showed significant increases in neutralizing antibodies after booster vaccination. For the 3B NSP antibody ELISA after vaccination, the mean S/P ratios for pigs vaccinated with all three FMD vaccines were all below the 0.23 cut-off value set by the manufacture, but some sera from individual vaccinated pigs gave results above this cut-off after primary or secondary vaccination. However, with the 3ABC NSP antibody ELISA, all sera from vaccinated pigs had negative results for NSP antibody for all time points.
doi_str_mv 10.1016/j.vaccine.2007.03.019
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source MEDLINE; Elsevier ScienceDirect Journals
subjects Allergy and Immunology
Animals
Antibodies, Viral - blood
Antigens
Applied microbiology
Biological and medical sciences
Diagnosis
Disease Outbreaks - veterinary
ELISA (enzyme linked immunosorbent assay)
Emulsions - administration & dosage
Farms
Foot & mouth disease
Foot-and-mouth disease
Foot-and-Mouth Disease - epidemiology
Foot-and-Mouth Disease - immunology
Foot-and-Mouth Disease - prevention & control
Foot-and-Mouth Disease - virology
Foot-and-mouth disease virus
Foot-and-Mouth Disease Virus - immunology
Foot-and-Mouth Disease Virus - pathogenicity
Freight forwarding
Fundamental and applied biological sciences. Psychology
Hogs
Immune response
Infections
Microbiology
Miscellaneous
Neutralization Tests
Neutralizing antibodies
Non-structural proteins
Studies
Swine
Swine Diseases - epidemiology
Swine Diseases - immunology
Swine Diseases - prevention & control
Swine Diseases - virology
Taiwan - epidemiology
Vaccination - veterinary
Vaccines
Vaccines, antisera, therapeutical immunoglobulins and monoclonal antibodies (general aspects)
Viral Nonstructural Proteins - immunology
Viral Structural Proteins - immunology
Viral Vaccines - administration & dosage
Viral Vaccines - immunology
Virology
title Immune responses of pigs to commercialized emulsion FMD vaccines and live virus challenge
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