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Intern Med. 2016;55(8):907-10. doi: 10.2169/internalmedicine.55.5628. Epub 2016 Apr 15.

Multiple Acute Infection by Anisakis: A Case Series.

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Department of Gastroenterology, St. Luke's International Hospital, Japan.


The ingestion of raw seafood infected with nematode larvae of the Anisakidae family can lead to gastric anisakiasis. The majority of the infections involve a single larva, however, there have been instances of multiple infection. The incidence rate and the characteristics of multiple infection by Anisakis remain poorly understood. We herein present a case of parasitization by multiple Anisakis larvae and describe 14 cases of multiple parasitization representing the largest reported case series to date. Endoscopists should therefore be aware of the potential for multiple infection by Anisakis and the need for a thorough inspection of all parts of the stomach when encountering such cases.

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