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Serial serum biochemical parameters in feedlot steers fed chlortetracycline.
Chlortetracycline (CTC 50) is widely used today as a livestock feed supplement because it promotes growth of poultry, swine, and calves by increasing weight gains. It is widely used in human and veterinary medicine for infections caused by organisms such as gram positive and gram negative bacteria, rickettsia, etc. At therapeutic levels, CTC 50 shows no deleterious effect on renal or liver function but occasionally some side reactions such as nausea, vomiting, loose stools, glossitis, and stomatitis may occur. Chlortetracycline is absorbed in the small intestine and stomach. Absorption can be impaired by the presence of milk, certain milk products, aluminum hydroxide gels, and salts of calcium and magnesium.