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[Echinococcus granulosus] [Echinococcus multilocularis] [Echinococcus oligarthrus] [Echinococcus vogeli]

Echinococcus multilocularis is the second most common cause of echinococcosis in humans.  The definitive hosts for E. multilocularis are also canids, but more commonly foxes than domestic dogs.  Arvicoline rodents also play an important role in the natural life cycle.

A	B

A: Echinococcus multilocularis in liver tissue, stained with hematoxylin and eosin (H&E).  Magnification at 200x
B: Higher magnification (400x) of the specimen in Figure A.  Notice a pair of refractile hooks (yellow arrows).  Cestode hooks do not stain with H&E but may be visible with proper adjustment of the microscope.

C	D

C: Echinococcus multilocularis is tissue, stained with H&E.  Magnification at 200x.
D: Higher magnification (400x) of the specimen in Figure C.  Notice the refractile hook (green arrow).