5.2.5.2 Ectopic anisakiasis

Anisakis species belongs to a dolphin/whale ascarid. Anisakiasis is caused by the ingestion of a larval nematode in raw seafood dishes such as sushi and sashimi. Infestation occurs mainly in the stomach, but infrequently intestinal or extragastrointestinal anisakiasis is encountered [66]. A dead and decayed larval nematode was identified in the peritoneal (omental) nodule, and microscopic identification of the nematode species was impossible. The diagnosis of extra-gastrointestinal anisakiasis was made by distinct immunoreactivity with a monoclonal antibody An2 against Anisakis simplex (a gift from late Dr. Hajime Ishikura, Sapporo Medical University, Sapporo). The 1:500 diluted patient's own serum reacted weakly with the internal organs, especially the gut (Figure 40) [21].
