The Pacific broad tapeworm Adenocephalus pacificus (syn.

Diphyllobothrium pacificum) is the causative agent of the third most common fish-borne cestodosis among humans. Although most of the nearly 1,000 cases among humans have been reported in South America (Peru, Chile, and Ec-uador), cases recently imported to Europe demonstrate the potential for spread of this tapeworm throughout the world as a result of global trade of fresh or chilled marine fish and travel or migration of humans. We provide a comprehensive survey of human cases of infection with this zoonotic para-site, summarize the history of this re-emerging disease, and identify marine fish species that may serve as a source of human infection when eaten raw or undercooked. Infection with the tapeworm Adenocephalus pacificus (syn. Diphyllobothrium pacificum) (Cestoda: Diphyllo-bothriidea) was described by Nybelin in 1931 in the Jua