title: Host-induced effects on the morphology of Ostertagia circumcincta in grazing sheep.
mesh_terms: D000821:Animal Feed; D000818:Animals; D001315:Australia; D001699:Biometry; D005260:Female; D008297:Male; D010029:Ostertagiasis / Q000469:parasitology / Q000662:veterinary*; D012621:Seasons; D012744:Sex Ratio; D012756:Sheep; D012757:Sheep Diseases / Q000469:parasitology*; D014251:Trichostrongyloidea / Q000033:anatomy & histology* / Q000254:growth & development; D014252:Trichostrongyloidiasis / Q000662:veterinary*