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A vaccine prepared using gamma-irradiation by the Centro Energia Nuclear para Agricultura in Piricicaba, Brazil, was compared with the commercial vaccine Dictol against D. viviparus. 6 calves given the Brazilian vaccine and 6 given Dictol each received 2 oral doses at a 4-week interval. One month...

Gennari, S. M.; Duncan, J. L.
Pesquisa Agropecuária Brasileira, 1983, 18, 8, pp 911-917