Bothriocephalosis is a mammalian cosmopolitan intestinal parasitosis. In addition to non-specific digestive problems (nausea, abdominal pain, lack of appetite), bothriocephalosis provokes an anemia caused by vitamin B12 deficiency that resembles Biermer anemia (anemia characterized by abnormally large red blood cells). The disease is MONDO_0015260 (diphyllobothriasis). Also known as: Bothriocephalosis, Diphyllobothrium caused disease or disorder, Diphyllobothrium disease or disorder, Diphyllobothrium infection, Diphyllobothrium infectious disease, fish tapeworm.