Trichinosis, muscle biopsy Trichinosis is a parasitic infection secondary to consuming undercooked pork. The condition manifests in three phases; (1) the ingested larvae penetrate the intestinal wall, causing nausea, vomiting, diarrhea and abdominal pain (2) as the larvae migrate a systemic hypersensitivity response occurs in the form of conjunctival hemorrhages, periorbital edema, splinter hemorrhages (don't confuse for infective endocarditis) and chemosis. (3) the last phase occurs when larvae invade skeletal muscle causing muscle pain and weakness. CBC may show eosinophilia.