title: 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.
abstract: Three trials using 50 European breed cattle were conducted to evaluate the therapeutic and prophylactic efficacy of the Ivomec SR Bolus against nematodes (2 trials) and Psoroptes ovis (1 trial) in cattle weighing more than 300 kg at the time of treatment. The Ivomec SR Bolus proved to be highly effective against economically important gastrointestinal and pulmonary nematodes (Ostertagia ostertagi, Trichostrongylus axei, Cooperia punctata, Oesophagostomum radiatum, Dictyocaulus viviparus) and improved the rate of weight gain significantly. P. ovis was eliminated from cattle treated with an Ivomec SR Bolus. The treatment also provided prophylaxis against an infestation of P. ovis and increased the weight gain of cattle infested with P. ovis.
authors.affiliation: Merck Research Laboratory, Kathrinenhof, Rohrdorf, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Rehbein
authors.forename: S R
authors.initials: SR
authors.lastname: Pitt
authors.forename: W K
authors.initials: WK
authors.lastname: Langholff
authors.forename: D
authors.initials: D
authors.lastname: Barth
authors.forename: J S
authors.initials: JS
authors.lastname: Eagleson
mesh_terms: D000818:Animals; D000871:Anthelmintics / Q000627:therapeutic use*; D001835:Body Weight; D002417:Cattle; D002418:Cattle Diseases / Q000188:drug therapy*; D005260:Female; D007559:Ivermectin / Q000627:therapeutic use*; D008297:Male; D008924:Mite Infestations / Q000188:drug therapy / Q000662:veterinary*; D008925:Mites / Q000187:drug effects; D009349:Nematode Infections / Q000188:drug therapy / Q000662:veterinary*
chemical_list: D000871:Anthelmintics; D007559:Ivermectin