title: Scrapie control in the United States: a review of the past with an emphasis on the present Flock Certification Program.
authors.affiliation: USDA/APHIS, Veterinary Services, Trenton, NJ.
authors.forename: L A
authors.initials: LA
authors.lastname: Detwiler
mesh_terms: D000822:Animal Husbandry / Q000379:methods; D000818:Animals; D011159:Population Surveillance; D012608:Scrapie / Q000453:epidemiology / Q000517:prevention & control*; D012756:Sheep; D014481:United States / Q000453:epidemiology