title: A bluetongue epizootic in northwestern United States.
mesh_terms: D000818:Animals; D001819:Bluetongue / Q000453:epidemiology*; D002417:Cattle; D002418:Cattle Diseases / Q000453:epidemiology*; D006041:Goats; D012756:Sheep; D012757:Sheep Diseases / Q000453:epidemiology*; D014481:United States