Oxytetracycline Blood Serum Levels in Healthy, Pneumonic, and Recovered Cattle

Abstract

Two trials were conducted to study oxytetracycline (OTC) serum levels in clinically healthy, pneumonic, and recovered cattle. Five mg OTC per lb. of body weight was used in the first study and 7 .5 mg in the second. Significantly higher serum levels were obtained in diseased cattle than in either the clinically healthy or in the diseased cattle when treated after recovery. Few significant differences were noted when diseased cattle were injected with 7.5 mg OTC per lb. body weight at not more than 5, 10 or 20 cc per injection site.