(CIDRAP News) After close to 2 years of expanded testing, the US government is estimating that there are between four and seven cases of bovine spongiform encephalopathy (BSE) among the nation's 42 million adult cattle.
"The data shows that the prevalence of BSE in the United States is extraordinarily low," US Department of Agriculture (USDA) Secretary Mike Johanns said at a teleconference this morning.