Diphyllobothriasis is a parasitosis caused by the tapeworms of the genus Diphyllobothrium. It has been known as intestinal parasites of humans for a long time and has shown a reemergence in some countries such as Russia and Japan. The worm is acquired by eating raw or poorly cooked fish including salted or marinated fillets. Many infections with this parasite are reported to be mild or asymptomatic.
