A 5-year old Guernsey cow was admitted to the Iowa State College Veterinary Clinic on Mar. 4, 1951, with a history of a sudden drop in milk production a week following freshening, which occured on Feb. 20, 1951. She had been on a good ration, and was a high producing cow. When received at the clinic she showed severe depression, anorexia, hemoglobinuria and icterus. Her body temperature was 103.2°F., pulse 90, and her respiratory rate was 30.