These prions are believed to survive the feed-making process because the heat and pressure does not reach levels high enough to destroy infectivity. In order to prevent establishment or spread of this brain-wasting disease in cattle populations and the food chain, a number of countries have established bans prohibiting ruminant proteins in feed intended for ruminants, and some have enacted bans of all animal proteins in animal feed.
As part of the MBM Research Study commissioned by Ontario Pork to understand the context for the ban on meat and bone meal in Ontario hog rations, regulations in jurisdictions throughout the world are being examined. A preliminary literature review gives the following insights into regulations governing livestock feed in other countries around the world. Final results of the MBM study are expected in February 2004.
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