During cooking, the heat kills off the bacteria on the surface of the meat, but those in the centre remain alive when the burger is not cooked thoroughly. Freezing does not kill E.coli. It is also possible to pass the bacteria from one food to another on a cutting board or utensil. It can pass directly from hand to mouth or another food. The bacteria contaminate one to four percent of raw beef, pork, poultry and lamb.
Ground meat poses the greatest risk because it is handled more.
The bacteria may also be found in unpasteurized dairy products, untreated water and raw vegetables. Young children, the elderly and people with weakened immune systems are especially vulnerable. In severe cases, HUS can cause kidney failure and even death. When you think a burger is well cooked, cut it open and make sure there is NO PINK MEAT inside and the juices run clear. Wash hands with hot, soapy water after using the toilet, changing diapers and before preparing food especially if a family member has diarrhea.