The regulation of population of Ostertagia ostertagi in calves.
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases; D004463:Ecology; D005243:Feces; D005260:Female; D007814:Larva / Q000254:growth & development; D008297:Male; D010063:Ovum / Q000254:growth & development; D013997:Time Factors; D014251:Trichostrongyloidea / Q000254:growth & development*; D014252:Trichostrongyloidiasis / Q000662:veterinary*