Johns Hopkins ABX GuidePathogensParasites

Echinococcus

Paul G. Auwaerter, M.D.
Echinococcus is a topic covered in the Johns Hopkins ABX Guide.

To view the entire topic, please or purchase a subscription.

Official website of the Johns Hopkins Antibiotic (ABX), HIV, Diabetes, and Psychiatry Guides, powered by Unbound Medicine. Johns Hopkins Guide App for iOS, iPhone, iPad, and Android included. Explore these free sample topics:

Johns Hopkins Guides

-- The first section of this topic is shown below --

MICROBIOLOGY

  • Zoonotic cestode parasite: two major forms
    • Echinococcus granulosus: most common, cause of cystic echinococcosis (CE).
      • Intermediate hosts: sheep, cattle, pigs, camels, goats
      • Definitive hosts: dogs and other canids that eat internal organs of intermediate host.
        • Humans infected by ingestion of eggs indirectly from canid feces via environmental contamination of food/water.
    • E. multilocularis: less common, cause of alveolar (tumor-like) echinococcosis (AE).
      • Intermediate hosts: rodents, domestic pigs, wild boars, dog, monkeys
      • Definitive hosts: foxes, dogs, cats
      • Most cases described in Europe, Asia. Three cases described in North America.
    • Echinococcus vogeli (very rare): rodents intermediate host, while bush dogs definitive host in central, south America.
    • E. oligarthus (rare)
  • Larval forms (metacestodes) infectious to humans. Organism growth in host is extremely slow, hence often asymptomatic x many years.

-- To view the remaining sections of this topic, please or purchase a subscription --

Last updated: April 4, 2016