just to clarify a few things. mimzy is right on most points, pork should be cooked fully to kill parasites as they burrow into muscle and must be killed b4 eaten. chicken does harbor samonilla but other birds can be eaten at lower temps like duck and ostrich. the threat of e.coli from beef is mostly from ground beef: like most bacterias it lives on the surface of the meat to be ground, once this happens it is mixed into every part of ur burger or meatloaf etc so they should be cooked to well b4 eating. this is also why its ok to eat things rare or even raw, the bacteria is only on the surface, so if somthing is fresh cut then eat it raw
sushi does not mean raw fish, thats a popular misconception it means seasoned rice. raw fish is a popular ingrediant but so are cooked shrimp and crab. again the freshness is the issue but more importantly is the part of the fish being used or the fish itself. there a lots of tuna caught all the time but only some are fit for raw consumption. parasites are another big concern with fish, i would say more so than land animals. but many are removed durring the butchering process, i once pulled some sort of 5" live worm out of a seabass i was cleaning, threw it away served the fish. dont forget about heavy metal poisoning from fish too, thats worse than food poisoning anyday