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Abstract
Extract
The present owner of the farm on which this case occurred took it over in May, 1957. He bought in 12 heifers in May, 1958. which had not been vaccinated against Brucella abortus. During May to July, 1958, three of his cows (presumably vaccinated as calves) and one of these heifers aborted. In two of these cases (one cow and one of the heifers), the cause was determined to be B. abortus. Five maiden Large White sows were bought during April and May. Although pigs and cows were run in separate paddocks, the cows occasionally passed along a race to which the sows had access. One of these, the sow “Bess”, was clue to farrow on 20 August, but was observed to be aborting on 6 August.