21.   So far, no case of mad cow disease has ever been diagnosed in the U.S. cattle herd.

22.   Tennessee Technological University in Cookeville frequently receives bull semen, a gift it uses to fertilizes its cattle herd.

23.   The ban was imposed after the disease swept through British cattle herds and was linked to Creutzfeldt-Jakob Disease, which attacks the human brain.

24.   The British pound, stocks and bonds fell as the government prepared to reveal recommendations made by a scientific advisory panel on whether to reduce the cattle herd.

25.   The European Union banned the export of British beef after the disease, bovine spongiform encephalopathy, was found in the cattle herd there.

26.   The English government is considering destroying all native cattle herds to head off any possibility of the disease spreading.

27.   The highest corn prices in more than a century have forced feedlot operators to shrink their cattle herds to save on feeding costs, Agriculture Department figures showed.

28.   The liquidation of cattle herds has dented consumer prices.

29.   The larger cattle herd could boost the price of corn, a primary ingredient of livestock feed, as feed consumption increases.

30.   The twice-yearly report estimates the total U.S. cattle herd, the total calf population and the number of beef and milk cattle.