As Probe of Infected Cow Spreads, So Does Worry
By Shankar Vedantam and Blaine Harden,Washington Post
Saturday, December 27, 2003; Page A01
[農務省幹部デハーベン氏などの話]
追跡システムがないため、感染牛の肉がどこに行ったかも、感染牛がどこで生まれてどこで育ったかも判らない。
永遠に不明かも知れない。5月のカナダの経験では結局出生地は不明だったのだから。
DeHaven said. He cited the experience of Canadian investigators, who unsuccessfully tried to identify the birth herd of a cow found infected with mad cow disease in May, adding that "it could also be a matter of weeks or months. It's also possible that we may not be able to determine it at all."