I suggest you watch a program called - Monsters Inside Me - if you can get it - it is usually on Animal Planet station - it tells real stories about people who ended up getting parasites from eating food that was not washed or cooked enough - a lot of the times it takes a long time to find out what was the matter with the person after seeing a number of different doctors - recently a North Korean soldier crossed into the South - he was shot but lived and taken to a hospital - the doctors found that he was filled with parasites - including a tape worm over 12 inches long - years ago my wife was preparing some pork chops for supper - she had a habit of scraping the meat with a knife before cooking it - after doing that she set the meat on a plate for awhile - then she noticed some white worms coming out of the meat - we called the health department and ended up meeting the agent at the store where we bought the meat - if we would have eaten that meat without first cooking it properly we could have easily got real sick - the agent told us that there is no guarantee that any meat or fish doesn't have parasites and the only thing to do is make sure you cook it at a high enough temperature - pork 170 degrees