The document discusses several intestinal parasites including Entamoeba histolytica, Giardia lamblia, Cryptosporidium, Ascaris lumbricoides, Strongyloides stercoralis, and Taenia solium. It provides information on their symptoms, diagnosis typically involving examination of stool samples, and treatment options including metronidazole, albendazole, and praziquantel. Complications can include GI bleeding, lung infections, and in immunocompromised patients, disseminated disease affecting multiple organ systems.