Dwarf tapeworm (Hymenolepis nana, previously known as Vampirolepis nana, Hymenolepis fraterna, and Taenia nana) is a cosmopolitan species though most common in temperate zones, and is one of the most common cestodes (a type of intestinal worm or helminth) infecting humans, especially children. Abdominal pain, loss of appetite, itching around the anus, irritability, and diarrhea. Restlessness, irritability, restless sleep, and anal and nasal pruritus.
Epileptic seizures occur in infected children. The two drugs that have been well-described for the treatment of hymenolepiasis are praziquantel and niclosamide. A three-day course of nitazoxanide is 75–93% efficacious. Single-dose albendazole (400 mg) is also very efficacious (>95%). Morbidity is uncommon, only occurring when parasite burden is very high. Death has not been reported in association with this infection. Infection is most common in children aged 4-10 years, in dry, warm regions of the developing world. H nana infection affects millions of people, primarily children, worldwide.