A stage-specific surface area antigen of parasites, but the consequence of these for vaccine development remains to be defined. mediating immunity to ECF. Cattle immunized by contamination with cryopreserved sporozoites and given a simultaneous treatment regimen with tetracycline (22) acquire immunity that appears to be dependent on cell-mediated immune responses, in particular CD8+ schizont-specific cytotoxic… Continue reading A stage-specific surface area antigen of parasites, but the consequence of