FIELD : veterinary science.SUBSTANCE : invention relates to medicine, namely to veterinary medicine, and is intended for the treatment of diseases of mixed bacterial and helminth etiology in farm animals and birds. Complex antibacterial antihelminthic composition contains azithromycin, praziquantel, fenbendazol, bentonite, iodized table salt, molasses, chelated copper and blue vitriol. Components are used in the stated quantities.EFFECT : use of invention improves efficiency of treatment of diseases of mixed bacterial and helminth etiology before isolating the causative agent and studying its sensitivity to antibiotics, reduce the time and reduce the complexity of treatment.1 cl, 4 ex, 2 tbl