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File:Scrapie testing.jpg

Description William Rivera and Betty Masulis keep a sheep calm while veterinarian John Duncan draws blood to test for genetic resistance to scrapie.
Date Unknown
Source USDA Agricultural Research Service
Author Stephen Ausmus
( Reusing this file)
Public domain This image is in the public domain because it contains materials that originally came from the Agricultural Research Service, the research agency of the United States Department of Agriculture.

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