Trichinellosis can be contracted by eating raw or undercooked pork infected with the parasite Trichinella spiralis. Disease symptoms include abdominal pain, diarrhea, nausea, vomiting and weakness. Digestive system symptoms typically begin within 24 to 48 hours after eating contaminated, undercooked pork. Muscle and joint pain, cough, headache, fever and chill may develop weeks after the initial symptoms. Early treatment of Trichinellosis is important for permanently eliminating the parasite from the body.