According to an investigation by Consumer Reports, 69% of all raw pork samples tested (of about 200 samples) were contaminated with a dangerous bacteria known as Yersinia enteroclitica. This bacteria can cause fever, gastrointestinal illness, diarrhea, vomiting and cramps.
Ground pork was more likely to be contaminated than pork chops. This pork also tested positive for other contaminants including a controversial drug called ractopamine, which is banned China and Europe. Many of the bacteria that were found in the pork were actually resistant to multiple antibiotics, which makes treatment problematic and potentially lethal if you were to get sick.
via Why You Should Consider Not Eating Pork | Collective-Evolution.