USDA Quarantines Second California Farm in Mad Cow Disease Investigation

The U.S. Department of Agriculture (USDA) has quarantined a second California farm as part of its ongoing investigation into a confirmed incidence of Bovine Spongiform Encephalopathy (BSE), first reported on April 24. USDA quarantined the second farm because it is operated in close association with the dairy that housed the BSE-infected cow before its condition was detected. Additionally, USDA is investigating the ranch where the BSE-infected cow was raised 10 years ago. USDA also announced that of the two progeny known to have been born to the BSE-infected cow in the past two years, one was stillborn and the second, after being humanely euthanized, tested negative for BSE.

The origin and transmission of BSE to hundreds of thousands of cattle has been widely attributed to using cattle rendered protein produced from the carcasses of scrapie-infected sheep or cattle with a previously unidentified form of transmissible spongiform encephalopathy as livestock feed. This widespread practice of feeding substances derived from animals to other animals (even of the same species) was sharply curtailed following the BSE epidemic in the U.S. and Europe, but never fully eliminated. For example, livestock feed regulations in the U.S. continue to allow the feeding of certain mammalian slaughter by-products to calves as well as the inter-species feeding of rendered animal proteins, such as feeding poultry waste and litter to ruminants. USDA also announced that since the discovery of the infected cow, they have identified 10 different feed suppliers that delivered animal feed to the farm. Determining if the cow became sick from feed is an area where investigators are focusing close attention.

Read more...