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  • Title: A flagellin-adjuvanted PED subunit vaccine improved protective efficiency against PEDV variant challenge in pigs.
    Author: Li Q, Xu Z, Wu T, Peng O, Huang L, Zhang Y, Xue C, Wen Z, Zhou Q, Cao Y.
    Journal: Vaccine; 2018 Jul 05; 36(29):4228-4235. PubMed ID: 29891346.
    Abstract:
    PEDV variants, causing severe diarrhea in neonatal suckling piglets with a mortality rate up to 100%, have being epidemic since late 2010 in china. To meet the pressing need of safe and cost-efficient PED maternal vaccines against PEDV variant, we vaccinated growing piglets with a flagellin-adjuvanted PED vaccine rSF-COE-3D by injection at Houhai acupoint. The vaccination not only enhanced the antibody responses of serum IgG/IgA, mucosal IgA and serum neutralizing antibody, but also improved the production of IFN-γ and IL-4. Moreover, rSF-COE-3D could provide a better protection against the challenge of a high pathogenic PEDV variant, with less diarrhea pigs, less pigs with detectable PEDV shed, lower rank values of feces and less apparent lesions and inflammation in duodenum of the PEDV infected pigs. The improved protective efficiency of rSF-COE-3D compared with COE was mostly benefited from the enhanced production of serum IgA, mucosal IgA in feces and serum neutralizing antibody titers. Taken together, our data suggest that rSF-COE-3D would be a novel efficient PED vaccine.
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