The effect of weather in modifying the pattern of pasture larval contamination with Ostertagia circumcincta.
D000818:Animals; D002980:Climate; D005243:Feces; D010270:Parasite Egg Count; D012756:Sheep / Q000469:parasitology*; D013696:Temperature; D014251:Trichostrongyloidea / Q000254:growth & development*