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The kidney worm of swine is one of the most serious obstacles to profitable swine. production in the. South.. Since these parasites are located in the liver, kidney fat, kidney tissue proper, blood vessels, and other parts of the body outside the digestive system, they cannot be removed by any known medicinal treatment. The only hopeful outlook for the control of these parasites is a system of management designed to protect hogs from the infective larvae of the worms. These larvae develop from eggs eliminated with the urine of infected hogs. (Fig. 1.) Larvae of the kidney worm are prevalent on hog pastures in practically all the Southern States.