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Questions and Answers
What is the usual size range of the cysts developed by Echinococcus granulosus in humans?
What is the usual size range of the cysts developed by Echinococcus granulosus in humans?
How do sheep and other herbivores acquire infection from Echinococcus granulosus?
How do sheep and other herbivores acquire infection from Echinococcus granulosus?
How do humans become infected with Echinococcus granulosus?
How do humans become infected with Echinococcus granulosus?
What is the definitive host for Echinococcus granulosus?
What is the definitive host for Echinococcus granulosus?
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What percentage of human disease cases are due to Echinococcus granulosus?
What percentage of human disease cases are due to Echinococcus granulosus?
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Study Notes
Echinococcus granulosus Characteristics
- Cysts in humans typically range from 1 to 20 centimeters in size.
- These cysts can grow larger and cause significant health issues depending on their location within the body.
Infection in Herbivores
- Sheep and other herbivores acquire infection by ingesting eggs of Echinococcus granulosus that are shed in the feces of definitive hosts, usually canines.
- Herbivores serve as intermediate hosts, where the larvae develop into cysts in their organs.
Human Infection Routes
- Humans become infected through accidental ingestion of Echinococcus granulosus eggs, commonly via contaminated food, water, or surfaces.
- Close contact with infected dogs or their feces can also lead to transmission.
Definitive Host
- The definitive host for Echinococcus granulosus is primarily the domestic dog, which excretes the eggs, continuing the lifecycle of the parasite.
Prevalence of Human Disease
- Echinococcus granulosus accounts for approximately 70% of human infections caused by Echinococcus species globally.
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Description
Learn about Hydatid infection of the liver caused by Echinococcus granulosus. Understand its life cycle, hosts, and human susceptibility. This quiz provides insights into the parasitic infection and its impact.
