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Protection against tuberculosis in Eurasian wild boar vaccinated with heat-inactivated Mycobacterium bovis

AutorGarrido, Joseba M.; Sevilla, Iker A.; Beltrán-Beck, Beatriz ; Minguijón, Esmeralda; Ballesteros, Cristina ; Galindo, Ruth C. ; Boadella, Mariana ; Lyashchenko, Konstantin P.; Romero, Beatriz; Ruiz Fons, Francisco ; Aranaz, Alicia; Juste, Ramón A.; Vicente, Joaquín ; Fuente, José de la ; Gortázar, Christian
Fecha de publicación14-sep-2011
EditorPublic Library of Science
CitaciónPLoS ONE 6(9): e24905 (2011)
ResumenTuberculosis (TB) caused by Mycobacterium bovis and closely related members of the Mycobacterium tuberculosis complex continues to affect humans and animals worldwide and its control requires vaccination of wildlife reservoir species such as Eurasian wild boar (Sus scrofa). Vaccination efforts for TB control in wildlife have been based primarily on oral live BCG formulations. However, this is the first report of the use of oral inactivated vaccines for controlling TB in wildlife. In this study, four groups of 5 wild boar each were vaccinated with inactivated M. bovis by the oral and intramuscular routes, vaccinated with oral BCG or left unvaccinated as controls. All groups were later challenged with a field strain of M. bovis. The results of the IFN-gamma response, serum antibody levels, M. bovis culture, TB lesion scores, and the expression of C3 and MUT genes were compared between these four groups. The results suggested that vaccination with heat-inactivated M. bovis or BCG protect wild boar from TB. These results also encouraged testing combinations of BCG and inactivated M. bovis to vaccinate wild boar against TB. Vaccine formulations using heat-inactivated M. bovis for TB control in wildlife would have the advantage of being environmentally safe and more stable under field conditions when compared to live BCG vaccines. The antibody response and MUT expression levels can help differentiating between vaccinated and infected wild boar and as correlates of protective response in vaccinated animals. These results suggest that vaccine studies in free-living wild boar are now possible to reveal the full potential of protecting against TB using oral M. bovis inactivated and BCG vaccines.
Versión del editorhttp://dx.doi.org/10.1371/journal.pone.0024905
URIhttp://hdl.handle.net/10261/44321
DOI10.1371/journal.pone.0024905
ISSN1932-6203
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