Book contents
- Frontmatter
- Dedication
- Contents
- List of Contributors
- Preface
- Part I Clinical syndromes: general
- Part II Clinical syndromes: head and neck
- Part III Clinical syndromes: eye
- Part IV Clinical syndromes: skin and lymph nodes
- Part V Clinical syndromes: respiratory tract
- Part VI Clinical syndromes: heart and blood vessels
- Part VII Clinical syndromes: gastrointestinal tract, liver, and abdomen
- Part VIII Clinical syndromes: genitourinary tract
- Part IX Clinical syndromes: musculoskeletal system
- Part X Clinical syndromes: neurologic system
- Part XI The susceptible host
- Part XII HIV
- Part XIII Nosocomial infection
- Part XIV Infections related to surgery and trauma
- Part XV Prevention of infection
- Part XVI Travel and recreation
- Part XVII Bioterrorism
- Part XVIII Specific organisms: bacteria
- Part XIX Specific organisms: spirochetes
- Part XX Specific organisms: Mycoplasma and Chlamydia
- Part XXI Specific organisms: Rickettsia, Ehrlichia, and Anaplasma
- Part XXII Specific organisms: fungi
- Part XXIII Specific organisms: viruses
- Part XXIV Specific organisms: parasites
- 195 Intestinal roundworms
- 196 Tissue nematodes
- 197 Schistosomes and other trematodes
- 198 Tapeworms (cestodes)
- 199 Toxoplasma
- 200 Malaria
- 201 Human babesiosis
- 202 Trypanosomiases and leishmaniases
- 203 Intestinal protozoa
- 204 Extraintestinal amebic infection
- Part XXV Antimicrobial therapy: general considerations
- Index
- References
198 - Tapeworms (cestodes)
from Part XXIV - Specific organisms: parasites
Published online by Cambridge University Press: 05 April 2015
- Frontmatter
- Dedication
- Contents
- List of Contributors
- Preface
- Part I Clinical syndromes: general
- Part II Clinical syndromes: head and neck
- Part III Clinical syndromes: eye
- Part IV Clinical syndromes: skin and lymph nodes
- Part V Clinical syndromes: respiratory tract
- Part VI Clinical syndromes: heart and blood vessels
- Part VII Clinical syndromes: gastrointestinal tract, liver, and abdomen
- Part VIII Clinical syndromes: genitourinary tract
- Part IX Clinical syndromes: musculoskeletal system
- Part X Clinical syndromes: neurologic system
- Part XI The susceptible host
- Part XII HIV
- Part XIII Nosocomial infection
- Part XIV Infections related to surgery and trauma
- Part XV Prevention of infection
- Part XVI Travel and recreation
- Part XVII Bioterrorism
- Part XVIII Specific organisms: bacteria
- Part XIX Specific organisms: spirochetes
- Part XX Specific organisms: Mycoplasma and Chlamydia
- Part XXI Specific organisms: Rickettsia, Ehrlichia, and Anaplasma
- Part XXII Specific organisms: fungi
- Part XXIII Specific organisms: viruses
- Part XXIV Specific organisms: parasites
- 195 Intestinal roundworms
- 196 Tissue nematodes
- 197 Schistosomes and other trematodes
- 198 Tapeworms (cestodes)
- 199 Toxoplasma
- 200 Malaria
- 201 Human babesiosis
- 202 Trypanosomiases and leishmaniases
- 203 Intestinal protozoa
- 204 Extraintestinal amebic infection
- Part XXV Antimicrobial therapy: general considerations
- Index
- References
Summary
Cestodes cause intestinal (e.g., taeniasis, hymenolepiasis) and/or tissue parasitoses (e.g., cysticercosis, echinococcosis). Most of intestinal tapeworm infections are meat-borne zoonoses, whereas tissue infections with larval cestodes are fecal-borne, acquired mainly through ingestion of the tapeworm eggs from human, dog, or fox feces.
Taenia saginata and Taenia asiatica taeniasis
Taenia saginata, the beef tapeworm, sometimes >5 m long, may live up to 30 years in the small intestine of humans, who are its only natural host. Humans are infected by ingestion of the cysticercus, a bladder worm <1 cm in diameter, present in raw or undercooked beef.
Taenia saginata infections can spread easily because of a high fecundity of the tapeworm (>500 000 eggs produced daily for years), wide and long-term contamination of the environment with eggs, bovine cysticercosis that may escape routine meat inspection when of a low intensity, and, finally, common consumption of raw beef. More than 10% of nomads are infected in East Africa; in Europe the annual incidence in urban populations is <0.1%; in the United States and Canada, T. saginata taeniasis is uncommon and observed mainly among migrants from Latin America.
Taenia saginata infection occurs mainly in well- nourished middle-aged individuals who are raw beef eaters. Complaints include vague abdominal pains, nausea, weight loss or gain, and some peri- anal discomfort caused by gravid proglottids (about six per day) crawling actively out of the anus. Sometimes, the patient passes a longer part of tapeworm strobila; in that case the expulsion of proglottids may stop for some weeks. The diagnosis is set up by questioning and macroscopic examination of expulsed tapeworm proglottids.
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- Information
- Clinical Infectious Disease , pp. 1274 - 1278Publisher: Cambridge University PressPrint publication year: 2015