The standard treatment for diphyllobothriasis, is a single dose of Praziquantel, 5?10 mg/kg PO once for both adults and children. An alternative treatment is Niclosamide, 2 g PO once for adults or 50 mg/kg PO once. This infection can be prevented by not eating raw or uncooked fish.
Many asymptomatic treatments are observed. However, some of the common symptoms are abdominal discomfort, diarrhea, vomitings, weight loss, loss of memory, malnutrition etc.
Infection with Diphyllobothrium latum is often asymptomatic and long-lasting (decades). Infected persons may experience abdominal pain, vomiting, diarrhea, and weight loss. In some infections there may be a severe Vitamin B12 deficiency and anemia caused by obstruction of Vitamin B12 absorption coupled with high absorption rates by the tapeworm.