Describe in detail the disease syndrome caused by Trichinella spiralis (onset, symptoms, and duration)
Onset is 2 - 28 days, and duration is 1 -6 weeks. There are three stages of Trichinella spiralis. The first is the intestinal phase - nausea, vomiting, and ab cramps. Second phase is the muscle invasion in which the larvae matures in 5 - 7 days and causes edema, muscle pain, and remittent fever. Third is the convalescent phase which is a very slow recovery.