THERAPEUTIC AND PROPHYLACTIC EFFICACY OF THE IVOMEC SR BOLUS AGAINST NEMATODES AND PSOROPTES-OVIS IN CATTLE WEIGHING MORE THAN 300 KG AT THE TIME OF TREATMENT

Three trials using 50 European breed cattle were conducted to evaluate the therapeutic and prophylactic efficacy of the Ivomec SR Bolus agai nst nematodes (2 trials) and Psoroptes ovis (1 trial) in cattle weighi ng more than 300 kg at the time of treatment. The Ivomec SR Bolus prov ed to be highly effective against economically important gastrointesti nal and pulmonary nematodes (Ostertagia ostertagi, Trichostrongylus ax ei, Cooperia punctata, Oesophagostomum radiatum, Dictyocaulus viviparu s) and improved the rate of weight gain significantly, P. ovis was eli minated from cattle treated with an Ivomec SR Bolus. The treatment als o provided prophylaxis against an infestation of P. ovis and increased the weight gain of cattle infested with P. ovis.