title: Population dynamics of the parasitic stages of Ostertagia spp. in sheep.
mesh_terms: D000818:Animals; D008954:Models, Biological; D010029:Ostertagiasis / Q000469:parasitology / Q000662:veterinary*; D011157:Population Dynamics; D012756:Sheep; D012757:Sheep Diseases / Q000469:parasitology*; D014251:Trichostrongyloidea / Q000254:growth & development* / Q000472:pathogenicity; D014252:Trichostrongyloidiasis / Q000662:veterinary*