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This valuable monograph merits wide distribution. The well known contributions of A. V. Hardy and his co-workers to the study of undulant fever in this country provide an authoritative background for the material. While the report is primarily based on the observations in more than 300 cases encountered in Iowa, the authors have presented in concise form the historical, bacteriologic, immunologic, epidemiologic and clinical aspects of the disease. The observations in the Iowa cases are compared with those in the other states of this country and in other countries. The epidemiologic data indicate that undulant fever due to infection with the abortus or suis varieties of Brucella melitensis is widespread, and in regions in which systematic investigations have been conducted the disease has been found to be of frequent occurrence. While cattle have been generally regarded as the chief source of human infection, hogs appear to be an important source
Undulant Fever with Special Reference to a Study of Brucella Infection in Iowa.. JAMA. 1931;97(1):52. doi:10.1001/jama.1931.02730010056032
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