The seriousness of Bang's abortion disease in Utah has made it necessary to promote more definite plans toward its control and eradication. The economic losses encountered are brought about not only through the loss of the calves but by the lessened milk production and lessened sale value of the animals themselves. Breeding efficiency is lower and such cows are more subject to udder infections. Many states now require that cattle shipped into them be negative to the abortion test; indications are that more states will adopt similar regulations. The passage of such regulation by some states would seriously interfere with the shipment of surplus dairy cattle from Utah.
Madsen, D. E. and Hendricks, W. H., "Circular No. 94 - Control and Eradication of Bang's Abortion Disease" (1931). UAES Circulars. Paper 87.