Local government authorities have confirmed that preliminary tests on a slaughtered six-year-old dairy cow near Tokyo suggest that it was infected with mad cow disease A spokesman for Kanagawa prefecture explained that tissue from the cow has now been sent to a national institute for a second round of tests. Results from these tests are due to be released in the next day or two, and if they confirm the presence of BSE, the cow will be the fifth case in Japan since the disease was first discovered about last autumn.