Strongyloides stercoralis

Strongyloides stercoralis, thread worm, is a human pathogenic parasitic nematode (roundworm) causing the disease strongyloidiasis. The adult parasitic stage lives in tunnels in the mucosa of the small intestine and is contracted from larvae in the soil that penetrate the skin. Symptoms include vomiting, diarrhea, and a peptic ulcer-like pain epigastric pain. The drugs of choice are the benzimidazoles or ivermectin.