|
Harrison's Principles of Internal Medicine, 18e
| Part 8. Infectious Diseases > Section 19. Helminthic Infections > |
Chapter 220. Cestode Infections
Sections: Cestode Infections: Introduction, Further Readings.
Topics Discussed: cestoda; cestode infections; parasitic diseases; parasitology.
Excerpt:"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.The beef tapeworm T. saginata occurs in all countries where raw or undercooked beef is eaten. It is most prevalent in sub-Saharan African and Middle Eastern countries. T. asiatica is closely related to T. saginata and is found in Asia with pigs as intermediate hosts. The clinical manifestations and morphology of these two species are very similar and are therefore discussed together.Humans are the only definitive host for the adult stage of T. saginata..."
The content above is only an excerpt.
For full access, log into an existing user account below,
purchase an annual subscription, or
purchase a short-term subscription to the complete website.
|
|
|
|
Or
|
|
|
|