title: Efficacy of coumaphos crumbles and naftalofos boluses against nematodes of cattle.
abstract: Coumaphos crumbles (0.32%) administered to cattle at the dose level of 2 mg of active ingredient per kilogram of body weight each day for 6 days reduced fecal egg counts by 98.4%. The compound was highly efficacious in removing adult worms of the genera Haemonchus, Ostertagia, Trichostrongylus, Cooperia, Oesophagostomum, and Trichuris, removing 99.8, 86.7, 95.9, 99.8, 74.8, and 90.9% of the worms, respectively. The overall efficacy of coumaphos crumbles against the adult forms of the 6 genera was 91.3%. Naftalofos boluses administered to cattle at the dose level of 50 mg of active ingredient per kilogram of body weight reduced fecal egg counts by 83.5%. The efficacies against adult nematodes were as follows: Haemonchus, 99.8%; Ostertagia, 86.9%; Trichostrongylus, 74.0%; Cooperia, 71.9%; Oesophagostomum, 40.1%; and Trichuris, 87.9%. The overall efficacy of naftalofos boluses against the nematodes was 76.8%.
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000188:drug therapy*; D003372:Coumaphos / Q000008:administration & dosage / Q000627:therapeutic use*; D005260:Female; D007306:Insecticides / Q000627:therapeutic use*; D008297:Male; D009281:Naphthalenes / Q000008:administration & dosage / Q000627:therapeutic use; D009349:Nematode Infections / Q000188:drug therapy / Q000662:veterinary*; D009943:Organophosphorus Compounds / Q000008:administration & dosage / Q000627:therapeutic use*
chemical_list: D007306:Insecticides; D009281:Naphthalenes; D009943:Organophosphorus Compounds; C008897:naftalofos; D003372:Coumaphos