RT Book, Section A1 White, A. Clinton A1 Weller, Peter F. A2 Kasper, Dennis L. A2 Fauci, Anthony S. SR Print(0) ID 1141414025 T1 CESTODE INFECTIONS T2 Harrison's Infectious Diseases, 3e YR 2017 FD 2017 PB McGraw-Hill Education PP New York, NY SN 9781259835971 LK accessbiomedicalscience.mhmedical.com/content.aspx?aid=1141414025 RD 2024/03/28 AB Cestodes, or tapeworms, are segmented worms. The adults reside in the gastrointestinal tract, but the larvae can be found in almost any organ. Human tapeworm infections can be divided into two major clinical groups. In one group, humans are the definitive hosts, with the adult tapeworms living in the gastrointestinal tract (Taenia saginata, Diphyllobothrium, Hymenolepis, and Dipylidium caninum). In the other, humans are intermediate hosts, with larval-stage parasites present in the tissues; diseases in this category include echinococcosis, sparganosis, and coenurosis. Humans may be either the definitive or the intermediate hosts for Taenia solium. Both stages of Hymenolepis nana are found simultaneously in the human intestines.