An atypical strain of mad cow disease seems to have been the cause of two cases of mad cow disease in Texas and Alabama and researchers say the mysterious strain could appear spontaneously in cattle.

Differences between the two U.S. cases and mad cow epidemic in Britain since the 1980s are making it more difficult to understand the degenerative brain disorder, which has the medical name of bovine spongiform encephalopathy (BSE), reports the AP

According to a new investigation, scientists say that about tens of millions of Britons are at risk of contracting the mad cow disease.

Previously, researchers had supposed that only 40 percent of the population was at the risk of disease vCJD, believed to have been passed from cattle to humans through eating meat infected with BSE during the 1980s and 1990s, says The Scotsman

Colorado has confirmed a case of Creutzfeldt-Jakob disease (CJD), and is waning other patients may be at risk.

Littleton Adventist Hospital in Denver is confirming a patient who underwent brain surgery in February suffered from the brain-wasting disease, which is similar to mad cow disease

Russia has jumped on the bandwagon of several other nations in banning poultry products from Britain.

The Times of London reports, the island nation of Japan had previously banned poultry, eggs and even breeding birds from Britain. While Hong Kong has banned exports from Norfolk, which is the epicenter of a bird flu alert

Despite a seemingly earnest effort, the government ends an unsuccessful investigation to track the origins of an Alabama cow infected with mad cow disease.

According to AP, seven weeks of investigation of more than three dozen farms ended with little answers