In contrast, " N . salmincola " was not recognized to be a source of an infection until a researcher purposefully infected himself in a scientific experiment in 1958.
12.
Besides Philip experimentally infecting himself with the North American " N . salmincola ", the first naturally acquired human intestinal infection cases were observed between September 1974 and October 1985.
13.
Two years after the first 10 cases of human infection with " N . salmincola " were reported in 1987, Fritsche et al . reported ten additional cases of human nanophyetiasis.
14.
However, canids are affected by the " Neorickettsia helminthoeca " bacteria, for which " N . salmincola " acts as a vector, and not by the parasite itself.
15.
Upon further examination of the morphology, Chapin reassigned the trematode to the family Troglotrematidae and renamed the parasite " Nanophyetus salmincola ", since " Nanophyes " was already taken.
16.
The study revealed 10 patients who presented with positive " N . salmincola " stool samples and either gastrointestinal complaints or otherwise unexplainable peripheral blood eosinophilia . 7 patients recalled ingestion of undercooked or raw fish.
17.
Very few known cases of naturally acquired human infection with " N . salmincola " are found in the literature, though it is likely that many cases are unreported, since most people are asymptomatic, or symptomatic with non-specific symptoms like gastrointestinal discomfort.
18.
Argument regarding whether or not " N . schikhobalowi " and " N . salmincola " were the same or different species recurred until 1966 when the two were granted subspecific status in order to reflect their biological and geographic differences, but little significant morphological differences.
19.
The two large oval testes are 0.2 to 0.3 mm long and the round ovary is 0.07 to 0.11 mm in diameter . " N . salmincola " has a prominent cirrus pouch, or hollow organ surrounding the male copulatory organ, but no seminal vesicle.
20.
Unlike other forms of ehrlichiosis, " Neorickettsia sennetsu " is transmitted by trematodes from fish . " Neorickettsia risticii " causes Potomac horse fever . " Neorickettsia helminthoeca " is found in association with the trematode " Nanophyetus salmincola ", and causes salmon poisoning disease in dogs and other canids . " Neorickettsia elokominica " causes a similar disease, Elokomin fluke fever, in canids and other species.
