SALMON POISONING DISEASE AND ELOKOMIN
Salmon poisoning disease (SPD) is caused
helminthoeca and Elokomin
fluke fever (EFF) by N. elokominica,
two rickettsias transmitted by trematode vector Nanophytus salmonica.
The trematode harbours the rickettsias
throughout its life cycle, which is complex and involves two intermediate hosts,
a snail and salmonid fish; the adult fluke is found in fish-eating mammals and birds.
The disease is seen mainly on the west coast of North America, coincident with the
distribution of the snail intermediate host (Oxytrema
silicula). Although the
fluke has a fairly wide host range, rickettsial disease is generally seen only in
dogs: cats are not susceptible.
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