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Metropolitan Agriculture
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Mad Cow disease has entered the U.S. food chain via a single “downer”
dairy cow in Washington State. What can consumers do to protect
themselves?
What is “mad cow disease?”
Mad Cow disease is one of a family of diseases that strike cattle,
deer, sheep and people. (In cattle the disease is called bovine
spongiform encephalopathy, or BSE; in deer and elk, chronic wasting
disease; in sheep, scrapie; and in people, kuru and Crutzfeld-Jacob.)
These diseases are caused by prions (proteins) that mutate and concentrate
in the brain and central nervous system. The diseases are contracted
through the spontaneous mutation of prions, or by the mutation of
prions in response to forces in the environment, such as exposure
to BSE-tainted meat. These brain-eating diseases are always fatal.
Mad cow disease has been shown to be transmissible to people via
the consumption of infected meat. The disease in people is called
variant Crutzfeld-Jacob, as opposed to the regular form of Crutzfeld-Jacob,
which is contracted through the apparent spontaneous mutation of
prions.
What are the odds of contracting “mad cow” disease?
Very little is known about how variant Crutzfeld-Jacob is contracted
from eating BSE-tainted beef, and thus the odds for contracting
the disease are unknowable at this time. However, we can look to
the world’s epicenter of BSE, Great Britain, for guidance.
Over 100,000 cattle tested positive for BSE in Great Britain, and
tens of millions of people were exposed to the disease through the
consumption of tainted meat. Despite this tremendous exposure, only
143 cases of variant Crutzfeld-Jacob have been reported to date.
In the United States, only 1 dairy cow has tested positive for BSE.
What can consumers do to protect against “mad cow” disease?
1. Ask the government to:
End the feeding of animals to the mammals
people eat, including the feeding of cattle blood products to
calves.
Expand the testing of cattle for BSE.
Require the reporting of Crutzfeld-Jacob cases
to the CDC.
2. Choose organic or grass-fed beef.
3. Choose meat from cattle that are three years old or less.
4. Avoid meat from brains or the central nervous system. Brains
are thought to be 3 million times more infectious than muscle, so
be aware of what is in your hamburgers, hot dogs and sausages.
Olson’s Law of the Universe:
The farther away we are from the source of our food, the less control
we have over what is in that food!
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