E. granulosus has a life cycle that involves two hosts
The adult worm lives in the small intestine of dogs and other canines
Eggs are discharged in the feces and can be ingested by intermediate hosts
Humans can acquire the infection through direct contact with infected dogs or contaminated food/water
The oncospheres hatch in the duodenum and enter the portal vein
The liver acts as the first filter for the parasites
The lungs act as the second filter
Parasites can settle in various organs and cause a cellular reaction
Host defense mechanisms can destroy a large number of parasites
Eosinophils are involved in the cellular reaction against the parasite.

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