The small scientific world of prion researchers -- the scientists who investigate "transmissible spongiform encephalopathies" (TSE) such as mad cow disease in cattle and Creutzfeldt-Jakob Disease (CJD) in humans -- is abuzz. That's because the two confirmed cases of US mad cow disease in Texas and Alabama are an "atypical" strain different from the British strain but identical to an atypical strain found so far in a small number of cattle in France, Germany, Poland and Sweden. The discovery of "atypical" mad cow disease in the US should not be surprising. Sheldon Rampton and I reported way back in 1997 that very strong evidence of an "atypical" TSE disease infecting US cattle was established by the work of Dr. Richard Marsh, the researcher to whom we dedicated our book Mad Cow USA.