Publications

Vaccine. 2005-04-15; 23.21: 2791-800.

Novel baculovirus-derived p67 subunit vaccines efficacious against East Coast fever in cattle

Kaba SA, Musoke AJ, Schaap D, Schetters T, Rowlands J, Vermeulen AN, Nene V, Vlak JM, van Oers MM

PMID: 15780727

Abstract

Two novel baculovirus-derived recombinant Theileria parva p67 constructs were tested for their vaccine potential against East Coast fever. Boran calves were immunized with a his-GFP-p67 fusion protein (GFP:p67deltaSS) or with GP64:p67C, a protein fusion between a C-terminal domain of p67 and the baculovirus envelope protein GP64. Both GFP:p67deltaSS and GP64:p67C induced antibodies with high ELISA titers that neutralized T. parva sporozoites with high efficiency. Upon challenge, a correlation was observed between the in vitro neutralizing capacity and the reduction in severe ECF for individual animals. A protection level upto 85% was obtained. This level of protection was achieved with only two inoculations of 100 microg per dose, which is a major improvement over previous recombinant p67 products.

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