CONTINUED from page 8
OUTLINE
ECHINOCOCCUS GRANULOSUS
1) Basic life cycle
2) Geographic distribution
3)
Pathophysiology
- organ localization and cyst characteristics
4) Clinical features
5)
Diagnosis
- imaging
- laboratory
6)
Treatment
- surgical
- medical
7) Prognosis and outcomes
8) Canadian peculiarities
BASIC
LIFE CYCLE
- mature worm lives in intestine of DEFINITIVE HOST (dog/other
carnivore)
- attaches to mucosa by hooklets
- eggs passed in animal's stool onto ground
- eggs ingested by INTERMEDIATE HOST (sheep or other ruminants, e.g. moose
from grazing on grass)
- humans are accidental intermediate hosts (children in contact with dog
feces on ground, on from contaminated water, soil, or meat)
- embryos released after digestion
- portal circulation to organs (liver most commonly, lung) where cysts
are formed
- life cycle completes when carnivores eat viscera of ruminants
