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Arteriosclerosis in Forestomach-Bypass Calves¹

Departments of Dairy Science and Veterinary Science, and Livestock Sanitary Service, University of Maryland, College Park

ABSTRACT

The occurrence of arteriosclerosis in two forestomach-bypass calves (esophageal-abomasal anastomosis) of 8.5 and 11 months of age is reported. Lesions were seen on the endocardial surfaces of the atrial and ventricular walls of the heart and in the pulmonary artery. Of two surgically unaltered calves, 11 months old, one displayed slight arteriosclerotic changes, located in the pulmonary artery. All calves were fed commercial milk replacer as their only feed. The fore-stomach-bypass calves had poor appetites for several months before death. The surgically unaltered calves appeared healthy, whereas the forestomach-bypass calves were under-weight and appeared unthrifty. Numerous degenerative lesions were found in various organs of the forestomach-bypass calves.

¹ Scientific Article no. A-1468. Contribution no. 4101 of the Maryland Agricultural Experiment Station, College Park, Maryland.