Ecology and control of gastrointestinal nematodes of beef cattle.
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000453:epidemiology / Q000469:parasitology* / Q000517:prevention & control; D004198:Disease Susceptibility; D004463:Ecology; D007411:Intestinal Diseases, Parasitic / Q000469:parasitology / Q000517:prevention & control / Q000662:veterinary*; D009348:Nematoda / Q000254:growth & development*; D009349:Nematode Infections / Q000469:parasitology / Q000517:prevention & control / Q000662:veterinary*; D010029:Ostertagiasis / Q000453:epidemiology / Q000469:parasitology / Q000662:veterinary; D010571:Pest Control; D012621:Seasons; D014251:Trichostrongyloidea / Q000254:growth & development