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A farmer, aged 29, who had had a fever for two weeks prior to examination, was found to have a morning temperature of 100.5 F. and an afternoon temperature of 102. This rose in a few days to 104. The pulse rate was 68. The spleen was palpable and the white cell count was 6,600. He was ambulant and had no diarrhea or other noteworthy intestinal symptoms except a coated tongue. The diazo test of the urine was negative.
A paratyphoid infection was suspected, but the blood serum gave negative agglutination tests for typhoid, and paratyphoid A and B. There was a positive blood culture for B. abortus, as well as a positive agglutination test. The blood tests were done by the state department of public health. Investigation disclosed that the patient drank milk from a cow that had aborted about two months previously. Two other members of his family were not affected.
Parker WG. A CASE OF BACILLUS ABORTUS INFECTION. JAMA. 1928;91(17):1289. doi:10.1001/jama.1928.92700170003015b