Diphyllobothrium

ALSO KNOWN AS: Fish tapeworm, Salmon tapeworm, Broad tapeworm

Diphyllobothrium is a tapeworm, common in many fish species in Oregon. Most often seen as pale cysts (plerocercoid stages) adhering to the outside of the gut and other organs in the viscera.

Distribution: Global, particularly in cold-water freshwater and marine environments

Detection Methods: gross pathology / gross clinical signs, microscopic exam – histology, microscopic exam – wet mount

Hosts: Freshwater fish (intermediate hosts), humans, and mammals (definitive hosts)