Crab-eating macaque findings. One of the most well known examples of experiments on crab-eating macaques is the 1981 Silver Spring monkeys case. In 2014, 21,768 crab-eating macaques were imported in the United States to be used in experimentation. The crab-eating macaque has the third-largest range of any primate species, behind only humans and rhesus macaques. The IUCN Red List categorizes the species as Least Concern, and CITES lists them as Appendix II ("not necessarily threatened with extinction", in which trade must be controlled to avoid use incompatible with their survival). A recent review of their populations suggests a need for better monitoring
Bovine spongiform encephalopathy abilities, and ultimately death. The British Government enquiry took the view the cause was not scrapie, as had originally been postulated, but was some event in the 1970s that was not possible to identify. Spread to humans is believed to result in variant Creutzfeldt–Jakob disease (vCJD). The agent can be transmitted to humans by eating food contaminated with it. The highest risk to humans is believed to be from eating food contaminated with the brain, spinal cord, or digestive tract though any tissue may be involved.<ref name="FDA/CFSAN"> </ref> The pathogenesis of BSE is not well understood or documented like other