I forgot to mention that ground beef is a major potential source for an especially virulent strain of E. coli. Ground is the worst because grinding the meat into pieces increases the surface area for the bacteria and works it all through the meat. Cutting boards, dishes and utensils that touch raw meat are a potential problem too. Apple juice is also a source of E. coli if it's not pasteurized. Hand washing with regular soap is recommended after handling raw meat.