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[Biological study of a case of colonic anisakiasis. Review of the literature].

An eosinophilic granuloma was found in the operative specimen from a patient who underwent colonic resection eleven days after onset of abdominal pain. Upon questioning, the patient reported having eaten raw fish eggs (cod) on the day before the onset of abdominal pain. Colonic localization of this anisakiasis, although more common in Europe than in Japan, is nevertheless infrequent, with only 17 other cases having been published to date. Eosinophil counts rose after 15 days and specific serologic tests became positive after 21 days with titers remaining detectable longer by Western blot (31 months) than by immunoelectrophoresis (2 months). Routine serologic tests for anisakiasis in patients with eosinophilic granulomas of the digestive tract would ensure the correct etiological diagnosis in some cases.