Nutritional anemia in pigs has been responsible for considerable economic loss to the swine producers of this country for many years. It is hard to estimate the losses from this condition alone as nutritional deficiencies are often complicated by various forms of 'enteritis, commonly occurring in our swine herds, as well as heavy parasitic infestations. These two conditions may result in a severe depletion independent of a primary nutritional deficiency and produce symptoms and pathologic changes similar to those associated with nutritional anemia.