Diphyllobothriasis Nihonkaiense: Possibly Acquired in Switzerland from Imported Pacific Salmon

Hiroyuki Shimizu; Hidekazu Kawakatsu; Tsunehiro Shimizu; Minoru Yamada; Tatsuya Tegoshi; Ryuichi Uchikawa; Naoki Arizono

doi:10.2169/internalmedicine.47.1026

CASE REPORTS

Diphyllobothriasis Nihonkaiense: Possibly Acquired in Switzerland from Imported Pacific Salmon

Hiroyuki Shimizu, Hidekazu Kawakatsu, Tsunehiro Shimizu, Minoru Yamada, Tatsuya Tegoshi, Ryuichi Uchikawa, Naoki Arizono

Author information

Keywords: Diphyllobothrium nihonkaiense, tapeworm, praziquantel, salmon

JOURNAL OPEN ACCESS

2008 Volume 47 Issue 14 Pages 1359-1362

DOI https://doi.org/10.2169/internalmedicine.47.1026

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Abstract

A 5-year-old Japanese boy passed tapeworm strobila while he was living in Switzerland. During a short visit to Japan, he was successfully treated with a single dose of praziquantel. DNA sequences of ITS1, cox1 and nd3 genes from the tapeworm were compatible with those of Diphyllobothrium nihonkaiense rather than Diphyllobothrium latum, which is prevalent in Europe. The patient consumed imported salmon in Switzerland. This case highlights the globalization of D. nihonkaiense, which was once restricted to the Far East, and reflects the worldwide demand for seafood.

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