Cestodes are a type of parasitic tapeworm that infects the intestines of humans and animals. Synonyms for cestodes include taenia, tapeworm, and helminth. These parasites are notorious for their ability to cause various clinical symptoms, including abdominal pain, diarrhea, and weight loss. Depending on the species, cestodes can reach lengths of several meters and produce thousands of eggs per day. Despite being a common cause of parasitic infections, cestodes can be treated with antihelminthic drugs such as praziquantel. It is important to seek medical attention promptly if you suspect you may have been infected with cestodes.