title: Anthelmintic treatment of pastured dairy cattle in California.
abstract: The relationship of anthelmintic treatment for subclinical gastrointestinal nematode parasitism with resultant milk production was studied on 3 California dairies where animals were maintained on a pasture-based nutritional program. All of the animals that started lactating (freshened) during a 12-month period participated in trials in which coumaphos was given as a feed top dressing to animals averaging 30 days into lactation. All of the animals that freshened during the subsequent 12-month period from 2 of the same 3 dairies participated in trials in which thiabendazole was administered at or within 2 weeks before freshening. Anthelmintic administration during 2 consecutive lactation cycles under the conditions of the present study resulted in no consistent reproducible significant changes in milk production.
mesh_terms: D000818:Animals; D002140:California; D002417:Cattle; D002418:Cattle Diseases / Q000188:drug therapy* / Q000469:parasitology; D003372:Coumaphos / Q000627:therapeutic use*; D005260:Female; D007306:Insecticides / Q000627:therapeutic use*; D007774:Lactation; D009349:Nematode Infections / Q000188:drug therapy / Q000662:veterinary*; D011247:Pregnancy; D013827:Thiabendazole / Q000627:therapeutic use*
chemical_list: D007306:Insecticides; D003372:Coumaphos; D013827:Thiabendazole