UN says bird flu spreading across Africa,Human spilover feared

The U.N.'s food agency has warned that a highly contagious strain of avian flu is spreading across West Africa, decimating poultry farms and stoking fears the virus will jump from birds to humans. Markets and farms in Nigeria, Burkina Faso, Niger, Ivory Coast and Ghana have been hit with the deadly H5N1 virus over the past six months, the U.N.'s Food and Agriculture Organization (FAO) said.