From the Back Cover
Mad Cows and Cannibals guides the reader through the complex world of transmissible spongiform encephalopathies (TSEs) bizarre, degenerative brain diseases that afflict both animals and humans.The journey leads us from ritualistic cannibalism in the highlands of New Guinea. throuch the modern agricultural feeding practices that triggered the Mad Cow Disease epidemic in Great Britain, to the recent outbreak of chronic wasting disease in North America. In clear and accessible language, Mad Cows and Cannibals explains the biology of TSEs and explores how political and social actions can contribute to their spread. It also answers questions about how TSEs affect the safety of our food supply, blood supply, and medical procedures. A comprehensive list of web and print resources points the way for continued exploration of this important and controversial topic.
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The transmissible spongiform encephalopathies (TSEs) may be the most bizarre and mysterious diseases in nature. They are unlike any other infectious diseases, are not caused by viruses or bacteria, and they challenge the accepted dogmas of molecular biology. These fatal neurodegenerative diseases are terrifying, appear to strike in a random manner, and have no cure. Most scientists now accept the idea that TSEs are caused by rogue protein molecules that convert normal proteins into abnormal ones; however, this concept is still controversial.
In the mid-1990s, the spread of Mad Cow Disease to humans triggered panic in Europe, crippled Britain's beef industry, and helped topple the Conservative government in the United Kingdom. In 2003, the discovery of a case of Mad Cow Disease in a single cow in Alberta, Canada led to bans on the export of Canadian beef, and raised questions about the extent of Mad Cow Disease in North America. In addition, concerns about the safety of the blood supply, vaccines, and surgical instruments keep Mad Cow Disease in the news around he world. In North America, an epidemic of chronic wasting disease currently threatens wild and domesticated deer and elk populations and has depressed some economies that rely on hunting. So little is known about TSEs that reliable screening tests and effective treatments still do not exist.
To comprehend the threat that TSEs pose to human health and to assess whether regulatory measures are sufficient to control their spread, we need to understand as much as possible about these diseases. The goals of this booklet are:
- to describe the nature of TSEs their biology, history, and epidemiology;
- to address a number of specific questions about TSEs and human health with an emphasis on two recently emerged diseases Mad Cow Disease and Chronic Wasting Disease;
- to pose some of the ethical questions that surround TSEs;
- to provide resources for further study.
We have attempted to present the most current and accurate information possible, derived primarily from scientific literature, the media, and government sources. As research is progressing rapidly and TSE epidemics are changing daily, readers are encouraged to refer to scientific journals and the Web sites listed in the References and Resources section for the nest developments.