title: The ecology of the free-living stages of Ostertagia circumcincta.
mesh_terms: D000818:Animals; D004463:Ecology; D005243:Feces / Q000382:microbiology; D005260:Female; D007814:Larva / Q000254:growth & development; D010063:Ovum; D010270:Parasite Egg Count; D006109:Poaceae; D012621:Seasons; D012987:Soil; D013696:Temperature; D014251:Trichostrongyloidea / Q000254:growth & development* / Q000302:isolation & purification; D014887:Weather
chemical_list: D012987:Soil