Chlortetracycline Feed Grade from Zhumadian Huazhong Chia Tai Co. Ltd. is an antibiotic with effects against both gram negative and gram positive bacteria, leptospira, chlamydia, rickettsia, pasteurellosis, tuberculin, large virus and other pathogens, according to the company. The product is available in a granular or powdered form in 25-kg bags. This feed additive is suitable for poultry and swine.