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Splenectomized calves and intact cattle were immunized with virulent B. bovis exposed to various levels of irradiation, or with dead lyophilized material. The greatest degree of protection against virulent heterologous challenge was obtained with parasites exposed to 35 krad: this dose reduced the...

Wright, I. G.; Mahoney, D. F.
Australian Veterinary Association., Artarmon, NSW, Australia
Ticks and tick-borne diseases. (Proc. Symp., 56th Ann. Conf., Australian Vet. Ass., Townsville, 14-18 May 1979.), 1980, pp 11-14