11.   Investigators suspect the animals contracted the disease by eating contaminated animal feed.

12.   It is unclear how the cow contracted the disease, but investigators believe contaminated animal feed was the cause.

13.   It was confirmed hundreds of cattle and pig farms had also used contaminated animal feed.

14.   It was confirmed hundreds of cattle and pig farms also used contaminated animal feed.

15.   Radio reports said the agriculture ministry was also investigating whether contaminated Belgian animal feed had been imported and used in Greece.

16.   The animals were thought to have been exposed to contaminated feed.

17.   The disease, which has not been found in the United States, is believed to have been caused by contaminated feed prepared from animal carcasses.

18.   The government said the sheep may have been exposed through contaminated European feed.

19.   The opposition Labor Party on Saturday claimed that contaminated feed, which has been blamed for mad cow disease, was still reaching cattle.

20.   The latest scare followed a crisis in May, when the government announced dioxin had contaminated animal feed and pulled a vast range of foods from stores.