The activities of the livestock industry and the veterinary profession in the control and eradication of brucellosis in cattle in the United States presents a most interesting and colorful history. Records show that in Minnesota contagious abortion, as the disease was then commonly known, was of grave concern to the Live Stock Sanitary Board when it was first established in 1903. The first regulations, with the idea in mind to control this malady, were adopted in 1907; although at that time, little was known of the cause, the pathology or the epidemiology of the disease.