English 版 (精华区)
发信人: plankton (春天的好心情), 信区: English
标 题: mad cow disease in Japen
发信站: 哈工大紫丁香 (2001年12月12日19:15:13 星期三), 站内信件
Japanese officials are struggling to prevent the spread of
mad cow disease. Japan’s first case of mad cow disease
was reported in September. The Agriculture Ministry
confirmed last month that a second cow was infected.
Japan is the only country in Asia where mad cow disease is
known to have spread.
The disease is officially known as Bovine Spongiform
Encephalopathy, or B-S-E. It causes holes in the brain.
Cows act strangely before they die. So it is called mad
cow disease.
Scientists believe cows get the disease by eating meat and
bone meal from infected animals. Since September, Japan has
banned imports and use of feed made from animal remains.
Recently, the Agriculture Ministry announced plans to
destroy about five-thousand cows that may have been given
the feed.
Sales of Japanese beef products have dropped sharply in the
past three months. Since October, Japanese officials have
tested all cows that are killed for their meat. Some
scientists question the testing. They say the disease often
cannot be identied in young animals.
Scientists believe eating infected meat may cause a similar
brain disease in humans. This deadly disease is called
Creutzfeldt-Jakob disease. It cannot be cured.
About one-hundred people in Europe have died from
Creutzfeldt-Jakob disease in recent years. Most of them have
been in Britain.
Until recently, some experts have estimated that the total
number of deaths from eating infected beef could be as high
as one-hundred-thirty thousand. However, two new reports say there will be f
ewer deaths than earlier estimated. Science magazine reported the findings.
The reports say the total number of deaths from the disease
may be as low as two-hundred.
Researchers from France used a computer program to make
their estimate. They say their study is based partly on
a better understanding of Creutzfeldt-Jakob disease. They
also say evidence shows that young people are more likely
to become infected. In Britain, the average age of those
who died is twenty-eight. Only a few victims were older
than fifty. From this evidence, the team says the
probability of a person becoming infected decreases
with age.
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※ 来源:·哈工大紫丁香 bbs.hit.edu.cn·[FROM: 202.118.237.113]
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