Abstract
Anisakis simplex, a common parasite of the fish we eat, can cause eosinophilic enteriis by direct parasitization. The authors describe six cases of intestinal anisakiasis dignosed by morphologic and immunologic studies in vivo and in vitro, five being retospective cases of unclassified eosinophilic enteritis. All patients presented with symptoms of acute abdomen requiring urgent surgery. They all had segmental lesions in the jejunum and/or ileum. Histologically the authors observed eosinophilic miroabscesses; in two cases Anisakis larvae were found. None of the patients declared having eaten raw fish. The surgical pathologist plays a basic role in detecting this disase, although additional serologic investigation of anti-Anisakis IgE and a skin test should be done whenever possible.
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