ANTICOCCIDIAL EFFICACY AND CHICKEN TOLERATION OF POTENT NEW POLYETHER IONOPHORES .1. THE SEPTAMYCIN RELATIVE CP-82,009

The anticoccidial activity of the ionophore CP-82,009 against laboratory isolates of four major species of poultry Eimeria was investigated. Parameters of anticoccidial efficacy-that were evaluated were control of lesions and weight suppression. At 4 and 5 ppm, CP-82,009 demonstrated broad-spectrum anticoccidial efficacy in battery trials that was equivalent to reference commercial ionophores. When CP-82,009 was fed to uninfected broiler chickens at efficacious dose levels, growth rate and feed efficiency were found to be equivalent to commercial agents over a 21-day period in batteries and over a 49-day period in floor pens. From the present studies, it appears that CP-82,009 is an efficacious anticoccidial that is well tolerated by chickens, and that it ranks among the most potent anticoccidial ionophores described to date.