Diphyllobothriosis is a reemerging zoonotic disease because of global trade and increased popularity of eating raw fish. We present molecular evidence of host switching of a human-infecting broad fish tapeworm, Dibothriocephalus latus, and use of salmonids as intermediate or paratenic hosts and thus a source of human infection in South America.
Keywords: Argentina; Chile; Dibothriocephalus latus; Diphyllobothrium; Patagonia; South America; broad fish tapeworm; cestode; diphyllobothriosis; host switching; parasites; zoonoses; zoonotic infections.