STEPHEN AUSMUS / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY STEPHEN AUSMUS / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY
Editorial use only.
Bovine prion disease research. Veterinary medical officer drawing a blood sample from a domestic cow (Bos primigenius) that has been tethered and restrained. The sample will be tested for prion diseases. This sampling is being carried out by the Agricultural Research Service (ARS) of the US Department of Agriculture. Photographed in the USA.
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