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Failure of a recombinant Babesia bovis antigen to protect cattle against heterologous strain challenge
Journal article   Peer reviewed

Failure of a recombinant Babesia bovis antigen to protect cattle against heterologous strain challenge

Peter Timms, D N Barry, A C Gill, P J Sharp and A J de Vos
Research in Veterinary Science, Vol.45(2), pp.267-269
1988
url
https://doi.org/10.1016/S0034-5288(18)30947-0View
Published Version

Abstract

Groups of cattle were inoculated subcutaneously with (i) a recombinant DNA-derived Babesia bovis protein (KaBbl-GZ) fused to beta-galactosidase and combined with adjuvants, or (ii) native beta-galactosidase (GZ) plus adjuvant, or (iii) adjuvant only or (iv) a live, attenuated B bovis vaccine. KaBbl-GZ was produced in the lambda gt11-amp3 system as a 5-10 kD babesial polypeptide linked to GZ. KaBbl has previously been shown to be an immunodominant antigen of B bovis, localised at the apex of the parasite, and present in a range of B bovis strains. High levels of GZ antibodies were observed in KaBbl-GZ and GZ inoculated cattle, but specific KaBbl antibodies could not be detected by ELISA. Five months after primary inoculation, all cattle were blood challenged with a virulent heterologous B bovis strain. Despite four inoculations with KaBbl-GZ, significant protection against the challenge was not observed.

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Domestic collaboration
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Veterinary Sciences

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