Assessment of Mycobacterium bovis deleted in p27-p55 virulence operon as candidate vaccine against tuberculosis in animal models.

Abstract:

:A Mycobacterium bovis knockout in p27-p55 operon was tested as an antituberculosis experimental vaccine in animal models. The mutant MbΔp27-p55 was significantly more attenuated in nude mice than its parental strain but more virulent than BCG Pasteur. Challenge experiments in mice and guinea pigs using M. bovis or M. tuberculosis strains showed similar protection conferred by MbΔp27-p55 mutant than BCG in terms of pathology and bacterial loads in spleen but lower protection than BCG in lungs. When tested in cattle, MbΔp27-p55 did not induce IL-2 expression and induced a very low production of IFNγ, suggesting that the lack of P27/P55 reduces the capacity of M. bovis of triggering an adequate Th1 response.

journal_name

Biomed Res Int

authors

Bianco MV,Clark S,Blanco FC,Garbaccio S,García E,Cataldi AA,Williams A,Bigi F

doi

10.1155/2014/951978

subject

Has Abstract

pub_date

2014-01-01 00:00:00

pages

951978

eissn

2314-6133

issn

2314-6141

journal_volume

2014

pub_type

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