Research Findings Aureomycin is a member of the tetracycline class of antibiotics. While members of this class are similar in molecular structure, pharmaceutical   and structural differences between tetracyclines – such as   granularization – need to be considered in disease management. •  Higher premix potency than generic CTC¹ •  Greater retention of CTC after pelleting¹ Research Findings 30 25 20 15 10 5 0 Aureomycin Control Cow            Calf *    In a recent study, it was observed that calves treated with Aureomycin had a lower incidence of foot rot. Chlortetracycline in feed pellets – % drug level after 4 weeks 100 95 90 85 80 0 Aureomycin Generic CTC 90.4% 99% Retention of chlortetracycline after pelleting (%) 100 80 60 0 Aureomycin Generic CTC 96.8% 86%