Trichinosis is a parasitic infection caused by the larvae of the Trichinella worm, which humans can contract by consuming undercooked or raw meat, particularly from pigs. Once ingested, the larvae mature in the intestines and can migrate to various tissues, including muscles. Symptoms of trichinosis may include abdominal pain, diarrhea, fever, and muscle soreness. In severe cases, it can lead to complications affecting the heart and nervous system. Proper cooking of meat to safe temperatures can help prevent this infection.