49 minutes ago
http://story.news.yahoo.com/news?tmpl=story&cid=519&e=3&u=/ap/20040209/ap_on_re_us/mad_cowWASHINGTON - The Agriculture Department is ending its search for additional cases of mad cow disease even though officials have not found several animals suspected of having eaten the potentially infectious feed believed to have caused the only known U.S. case.
"Our investigation is now complete," Dr. Ron DeHaven, the department's chief veterinarian, said Monday. "We feel very confident the remaining animals, the ones we have not been able to positively identify, represent little risk."
The closure leaves officials not knowing what happened to 11 head of cattle among 25 that authorities say were most likely to have eaten the same feed as that given to a Holstein diagnosed in Washington state with mad cow after it was slaughtered on Dec. 9.
An international review panel created by Agriculture Secretary Ann Veneman said last week that U.S. officials had done a thorough job of searching for the animals but added that more focus should be put on preventing future cases.
Also unknown is what happened to all 10,410 pounds of meat that was recalled from the Washington state slaughterhouse that processed the Holstein and mixed its meat with that of 19 other animals. They expect some may have been eaten. However, the meat supply is safe, DeHaven said. USDA had said the parts of the Holstein that could have contained infectious material, such as the brain and spinal cord, were removed before processing.