Synonym: salmon poisoning disease (SPD) in dogs
Species: Nanophyetus salmincola
Distribution: Siberia and Pacific Northwest
Fishes that may serve as source:
(1) coho salmon (Onchorhynchus kisutch)
(2) steelhead trout
Exposure may follow ingestion of metacercariae after:
(1) handling highly infected fish (probably eating with unwashed hands)
(2) eating raw fish
(3) eating incompletely cooked fish
(4) eating home-smoked fish
(5) eating kippered (salted and smoked) fish
(6) eating fish eggs
Symptoms in humans:
(1) chronic diarrhea
(2) nausea and vomiting
(3) abdominal discomfort
(4) weight loss
(5) fatigue
(6) gas with flatus
(7) bloating
Some patients may be clinically asymptomatic.
Laboratory findings:
(1) eosinophilia in the peripheral blood
(2) bipolar operculated eggs identified on stool examination for ova and parasites (64 to 97 microns long, 34 to 55 microns wide)
