CASE REPORTSHuman Intestinal Anisakiosis Due to Consumption of Raw SalmonCouture, Christian M.D., M.Sc.; Measures, Lena Ph.D.; Gagnon, Joël M.D.; Desbiens, Christine M.D. Author Information From Service d'Anatomopathologie et Cytologie (C.C.), Service de Chirurgie (J.G., C.D.), CHA, Hôpital Saint-Sacrement, and Pêches et Océans Canada and Institut Maurice Lamontagne (L.M.), Mont-Joli, Quebec, Canada. Address correspondence to Christian Couture, MD, MSc, FRCPC, Hôpital Laval, 2725 chemin Sainte-Foy, Sainte-Foy, QC, Canada G1V 4GS; e-mail (for reprint requests): [email protected] The American Journal of Surgical Pathology: August 2003 - Volume 27 - Issue 8 - p 1167-1172 Buy Abstract Anisakiosis is a parasitic infection that follows consumption of raw or insufficiently pickled, salted, smoked, or cooked wild marine fish infected with Anisakis sp. larvae. We report a case of intestinal anisakiosis in a 50-year-old man from Quebec who presented with abdominal pain and peripheral eosinophilia after eating raw wild-caught salmon from the Pacific Ocean off Canada. Abdominal CT scan showed bowel distension proximal to a segmental jejunal wall thickening, which was resected. The jejunum segment showed a localized area of serositis with mucosal edema and a submucosal abscess rich in eosinophils surrounding a parasite consistent with the third larval stage of Anisakis sp. Diagnostic morphologic characteristics included an unpaired excretory gland (renette cell), Y-shaped lateral epidermal cords, no apparent reproductive system, and a ventriculus (glandular esophagus). These features and the absence of lateral alae excluded Ascaris sp. The absence of ventricular appendage and intestinal cecum excluded other anisakids of the genera Pseudoterranova and Contracaecum. As the popularity of eating raw fish is growing in North America, anisakiosis may be diagnosed more frequently in surgical specimens. This parasitic infection should be considered in the differential diagnosis of acute abdominal syndromes and eosinophilic infiltrates of the stomach, small intestine, colon, omentum, and mesentery, especially with a history of raw marine fish consumption. © 2003 Lippincott Williams & Wilkins, Inc.