Cestodiasis is an infection caused by tapeworms, which are flat, segmented worms belonging to the class Cestoda. These parasites typically inhabit the intestines of various animals, including humans, and can be transmitted through contaminated food or water. Symptoms of cestodiasis may include abdominal pain, nausea, and weight loss, although some individuals may remain asymptomatic. Diagnosis is usually made through stool tests that identify tapeworm eggs or segments. Treatment often involves medications that effectively eliminate the parasites from the body.