Human Diphyllobothrium nihonkaiense Infection in Washington State

Abstract

A patient in Washington State harbored a fish tapeworm most likely acquired from eating raw salmon.Diphyllobothrium nihonkaiensewas identified bycox1sequence analysis. Although this is the first documented humanD. nihonkaienseinfection in the United States, the parasite may have been present earlier but misidentified asDiphyllobothrium latum.