Five calves from Brucella abortus reactor cows bought after they had been on infected farms for two to six weeks, were reared in isolation and examined serologically for approximately six months prior to cultural and biological examination post mertem. One calf which had been serologically negative to the Rose-Bengal, serum agglutination and complement fixation tests for the last eight weeks of its life yielded a culture of Br abortus biotype 1. This serotype had also been isolated from its dam at parturition.
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