Fecal egg count reduction and control trial determinations of anthelmintic efficacies for several parasiticides utilizing a single set of naturally infected calves.

摘要: In this study, a single set of naturally infected calves was used for the conduct fecal egg count reduction test (FECRT) immediately followed by control trial; all, to evaluate efficacies several commonly used, non-generic anthelmintics. Ten animals were allocated into each five treatment groups; untreated (UTC), injectable 1% moxidectin given at 0.2 mg kg(-1)BW (MXD), ivermectin (IVM), 9.06% oxfendazole orally 4.5 (OXF), and 10.0% fenbendazole 5.0 (FBZ). Confinement clean, concrete-floored pens initiated on day -7 continued until animal necropsy (2 necropsied per group days 35-39 nematode collections). All treatments 0, FECRT conducted all necropsy. From 2 14, FECR %'s combined strongyle counts >or=90% anthelmintic groups. At time necropsy, be with exception IVM (84%). After adjustment in accordance coproculture larvae percentages, Haemonchus, Ostertagia Cooperia found >or=94% MXD OXF, but or=96% MXD; removed except O. ostertagi LL(4) (81.9%), C. oncophora surnabada adults (77.4%) punctata (84.8%); OXF adults, EL(4) (89.9, 70.2 48.1%, respectively); FBZ (72.5, 0.0 21.9%, respectively). Judging from above data, trial results can extremely similar proper experimentation and, despite varied degrees resistance, targeted burdens carried Midwestern beef cattle are effectively parasiticides that available today.