Japanese researchers trigger onset of mad cow disease in cows

SAPPORO, Japan - Photo released by the Hokkaido Animal Research Center on Jan. 18 shows a cow which researchers have had infected with mad cow disease in what they call the first such experiment in Japan. The center said the researchers triggered the onset of bovine spongiform encephalopathy in three cows in an experiment in which the cows were injected with abnormal prions extracted from BSE-infected cows. (Kyodo)