In 2017%2C the National Academies of Sciences released this report examining the issue of brucellosis%2C wildlife and livestock. It found that elk%2C not bison%2C represent the most serious threat of transmitting the disease to cattle%2C debunking the argument used by the livestock industry and politicians that resulted in the deaths of more than 11%2C500 park bison. The report also said that artificially feeding elk made the disease threat worse