Federal regulations that enacted the NSEP went into effect: (1) Records and identification required for sheep moving in interstate commerce, (2) indemnity was reinstated and (3) a program to recognize states that conducted an active scrapie control program consistent with federal requirements was established.


Phase 1 of the Scrapie Slaughter Surveillance Study (SOSS) began.


2002 – Phase 2 of the Scrapie Slaughter Surveillance Study began. This phase was carried out to determine the prevalence of scrapie in the United States. 12,491 valid test results were obtained. It was determined that the overall weighted national prevalence of scrapie in mature sheep was 0.20 percent. More details are provided below.


APHIS adopted a genetics-based flock clean-up plan as a standard method for cleaning up scrapie-infected flocks.


2003 – USDA received $15 million in appropriated funding to conduct NSEP.


SOSS concluded and the Regulatory Scrapie Slaughter Surveillance began.


Scrapie Eradication Uniform Method and Rules published.


APHIS approved the immunohistochemistry on lymphoid tissue as an official test.


National Identification Development Team (NIDT) Steering Committee created.


2004 – SOSS results published.


Sheep-specific animal identification plan was presented to the NIDT Steering Committee.


2007 – APHIS received $18.4 million in appropriated funds to conduct NSEP.


2010 – Goal to eliminate scrapie outbreaks in the United States.


2017 – Goal for the United States to be declared “scrapie-free” by the World Organization for Animal Health (OIE) (D. Sutton, personal communication, 2007).



The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement