The trial vaccination of cattle against T. annulata using recombinant sporozoite antigens (SPAG-1 and p67) and/or merozoite antigens (TAMS 1-1 and 1-2). The aim of these trials was to try and enhance the levels of protection induced compared with previous trials. Different approaches were tried. SPAG-1 was expressed as a fusion protein with a His6 tag and then either incorporated into ISCOMs, with or without TAMS 1-1 and 1-2, or administered with RWL, a proprietary saponin-based adjuvant. Cross-protection studies were also performed by immunizing cattle with the T. parva sporozoite antigen, p67, and then challenging with a T. annulata sporozoite stabilate.All the data collected from these two trials indicate that SPAG-1 administered with RWL is better at inducing an effective immune response than SPAG-1 incorporated into ISCOMs, with or without the presence of merozoite antigens (Boulter et al., 1998).
Boulter et al., 1998: Boulter NR, Brown CG, Kirvar E, Glass E, Campbell J, Morzaria S, Nene V, Musoke A, D'Oliveira C, Gubbels MJ, Jongejan F, Hall FR. Different vaccine strategies used to protect against Theileria annulata. Annals of the New York Academy of Sciences. 1998; 849; 234-246. [PubMed: 9668470].
