mad cow disease

Chronic Wasting Disease, a deadly neurological disorder similar to Mad Cow, has been detected in 24 states. So far it has posed no risk to people, but a new Canadian study has prompted more testing.

For decades, a rare disease crawled across Papua New Guinea. When scientists realized what was behind kuru, it caught everyone by surprise. But similar diseases can still be transmitted through food.

It's only the fourth case of the deadly disease in the U.S. And it has doctors on an international hunt. How did a disease linked to contaminated beef in the U.K. more than a decade ago get to Texas?