A tapeworm infection occurs when a person ingests the eggs or larvae of a tapeworm, often through contaminated food or water. These parasites can live in the intestines and absorb nutrients from the host's diet, leading to symptoms like abdominal pain, weight loss, and digestive issues. Common sources of infection include undercooked pork, beef, or fish. Diagnosis typically involves stool tests to identify tapeworm segments or eggs. Treatment usually consists of medications that kill the tapeworm, allowing it to be expelled from the body. Maintaining good hygiene and cooking food thoroughly can help prevent infections.