Trichuris muris is a nematode parasite of mice. It is very similar to the human roundworm parasite Trichuris trichiura due to its immunological reactivity when crossed, and so is often used in related studies. Ingesting material that contains embryonated eggs allows for transmission and infection to occur. The eggs travel down to the cecum - a pouch located at the start of the large intestine - where larval hatching is induced.