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Título

Oral re-vaccination of Eurasian wild boar with Mycobacterium bovis BCG yields a strong protective response against challenge with a field strain

Autor Gortázar, Christian ; Beltrán-Beck, Beatriz ; Garrido, Joseba M.; Aranaz, Alicia; Sevilla, Iker A.; Boadella, Mariana ; Lyashchenko, Konstantin P.; Galindo, Ruth C. ; Montoro, Vidal ; Domínguez, Lucas; Juste, Ramón A.; Fuente, José de la
Fecha de publicación 26-abr-2014
EditorBioMed Central
Citación BMC Veterinary Research 10(1): 96 (2014)
Resumen[Background]: Field vaccination trials with Mycobacterium bovis BCG, an attenuated mutant of M. bovis, are ongoing in Spain, where the Eurasian wild boar (Sus scrofa) is regarded as the main driver of animal tuberculosis (TB). The oral baiting strategy consists in deploying vaccine baits twice each summer, in order to gain access to a high proportion of wild boar piglets. The aim of this study was to assess the response of wild boar to re-vaccination with BCG and to subsequent challenge with an M. bovis field strain. [Results]: BCG re-vaccinated wild boar showed reductions of 75.8% in lesion score and 66.9% in culture score, as compared to unvaccinated controls. Only one of nine vaccinated wild boar had a culture-confirmed lung infection, as compared to seven of eight controls. Serum antibody levels were highly variable and did not differ significantly between BCG re-vaccinated wild boar and controls. Gamma IFN levels differed significantly between BCG re-vaccinated wild boar and controls. The mRNA levels for IL-1b, C3 and MUT were significantly higher in vaccinated wild boar when compared to controls after vaccination and decreased after mycobacterial challenge. [Conclusions]: Oral re-vaccination of wild boar with BCG yields a strong protective response against challenge with a field strain. Moreover, re-vaccination of wild boar with BCG is not counterproductive. These findings are relevant given that re-vaccination is likely to happen under real (field) conditions.
Versión del editorhttp://dx.doi.org/10.1186/1746-6148-10-96
URI http://hdl.handle.net/10261/96107
DOI10.1186/1746-6148-10-96
E-ISSN1746-6148
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