Diphyllobothriasis can be a long-lasting infection (decades).
Most infections are asymptomatic. Manifestations may include abdominal discomfort, diarrhea, vomiting, and weight loss.
Vitamin B12 deficiency with pernicious anemia may occur. Massive infections may result in intestinal obstruction.
Migration of proglottids can cause cholecystitis or cholangitis.
Microscopic identification of
eggs in the stool is the basis of specific diagnosis. Eggs are usually numerous and
can be demonstrated without concentration techniques. Examination of proglottids
passed in the stool is also of diagnostic value.
is the drug of choice. Alternatively, Niclosamide can also be used
to treat diphyllobothriasis.
* This drug is approved by the FDA, but considered investigational for this purpose.