Ruddy
Ruddy Fly, Berners

FLY FISHING DICTIONARY
Midgeflies
Midge Flies
   
 
Anisakis  Latin noxious organism
An intestinal worm belonging to the nemathelminth family which contains several species. Anisakis is a parasite found in the stomach of marine mammals such as dolphin. Anisakis eggs are excreted from the dolphin and then eaten by the euphausiid - a species of shrimp that is a preferred food for other fish. In this way the Anisakis larva is transferred to them.
  If humans eat a fish that harbors the live larva, the larva will dig into the wall of the stomach or of intestines. It will cause intense stomachache and vomiting (fulminant type anisakiasis). It occurs usually 2 to 10 hours after ingestion of an infected fish. If the condition turns chronic, larva develops a lump in the stomach wall that is indistinguishable from stomach cancer during routine examinations. (chronic type anisakiasis).
  Prevention requires knowledge of the kind of fish that commonly harbors the parasite. They include squid, codfish, salmon, flounder, and mackerel. But other fish are not necessarily safe from getting infected. The parts of a fish harboring the larvae are the alimentary canal and muscles. A larva is long and slender, ash gray in color, and its length is 1.5-3.5 cm. When eating the above-mentioned fish raw like sashimi or sushi it is recommended to closely observe and to eat with care. An Anisakis larva will die if it is frozen to less than minus 20 degree C. for 24 hours, or heated to 60 degrees C. or more. It is reasonable to assume that pelagic fish such as tuna is safe. The problem lies mainly with non-frozen shore fish! Refer to a color and X X page.
  Treatment is rather easy if the diagnosis is made correctly. Taking the larva out of the stomach wall using a gastric camera, will relieve the pain dramatically. Because a chronic tumor type is just like that of a cancer, it should be removed surgically. Life threatening situations arise if the rupture of intestines cause peritonitis, but such cases occur rarely.
 
 
 
 
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A fly fisherman. Silver Creek, Idaho, U.S.A.
A fly fisherman. Silver Creek, Idaho, U.S.A.
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