Preliminary observations on vaccination against bovine cysticercosis in the Sudan.

Four Zebu calves, 1-1.5 years old, were vaccinated subcutaneously with hatched ova of Taenia saginata. The immunity elicited protected the animals from subsequent oral infections with this cestode as manifested by the early degeneration of the metacestodes and failure to attain maturity in three of four animals. Three viable cysts were found in the fourth calf compared to more than 300 specimens in non-vaccinated controls.