Gastric Anisakiasis Presenting Acute Gastrointestinal Symptoms: with special references to the endoscopic and roentgenographic findings of Anisakis larva penetrating into the wall of the human stomach and to its clinical features H. Kawauchi 1 , T. Namiki 1 , T. Morooka 1 , K. Nakagawa 1 , T. Oguro 2 13rd. dept. of Internal Med. Hokkaido University Faculty of Medicine 2Oguro Gastrointestinal Hospital pp.31-38
Published Date 1973/1/25
DOI https://doi.org/10.11477/mf.1403108340
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 It was previously reported that timely fiberscopic observation occasionally revealed Anisakis-like larva penetrating into the gastric wall. The larva was also visualized radiographically in patients with “food poisoning” symptoms occurring several hours after eating raw foods that contained Anisakis-like larvae.

 Temporarily we call such a case as “acute gastric anisakiasis.” and its symptoms are usually more severe due to re-infection. So far we have experienced 46 such cases, identifying parasitologically all the parasite bodies as those of Anisakis larva type Ⅰ, after picking them out with biopsy forceps under direct vision. The gastric body accounted for 80 per cent of the sites of larval penetration. The larva was rather transparent and whitish, exhibiting an impressive, brisk winding movement when seen through the fiberscope. In double contrast radiograph it was seen as linear translucence of various shapes.

 Clinically, 4 to 6 hours after ingestion of foods containing Anisakis-like larvae, considerably severe epigastric pain would arise as well as nausea and vomiting. In some cases even left abdominal pain and diarrhoea was observed. However, at this stage no hematologic changes such as eosinophilia were found. There was no seasonal or regional difference in the incidence of anisakiasis, nor was there any noticiable relationship between its frequency and the acidity of the gastric juice.

 Of 46 cases of anisakiasis, we have encountered 5 cases of ulcer and a single case of early cancer(Ⅱc) as complicating organic diseases of the stomach.

 We would like to point out that anisakiasis of the stomach may at times account for those acute gastric diseases usually regarded as acute gastritis, food poisoning or “gastric cramp.”

Copyright © 1973, Igaku-Shoin Ltd. All rights reserved.


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