1. Infected people excrete whipworm eggs in stool. 2–3. In the soil, the eggs mature. 4. The eggs may be swallowed when hands or food are contaminated with stool or soil that contains stool. 5. The eggs hatch in the small intestine and release larvae. 6. The larvae mature and establish themselves as adults in part of the large intestine (called the cecum).
Image from the Centers for Disease Control and Prevention Image Library.