The anticoccidial efficacy of arprinocid in broiler chickens under floor pen conditions.

The efficacy of arprinocid was tested against artificial infections of mixtures of Eimeria spp. in broiler chickens under floor pen conditions in 3 experiments. Treatment with arprinocid at 60 ppm over a 56 d period significantly increased the live mass gain and feed efficiency of broiler chickens. This increase compared favourably with that obtained by treatment with lasalocid, robenidine and halofuginone. Birds treated with arprinocid had substantially reduced numbers of sporulated oocysts in their litter, and less severe lesion scores than non-mediated birds.