What is the scolex of Hymenolepis nana?
What is the scolex of Hymenolepis nana?
Adult Hymenolepis nana tapeworms. Adults measure 15-40 mm and have a small, rounded scolex at the anterior end. The scolex is knoblike with four suckers and a rostellum bearing 20-30 hooks. The proglottids overlap (craspedote) and can be distinguished at the posterior, wider end.
What disease does Hymenolepis nana cause?
Hymenolepis nana is the most common cause of all cestode infections, and is encountered worldwide. In temperate areas its incidence is higher in children and institutionalized groups. Hymenolepis diminuta, while less frequent, has been reported from various areas of the world.
Does Hymenolepis nana spread in the body?
The cysticercoid stages of H. nana also can invade and develop in the human intestine; as a result, H. nana can complete its entire life cycle in the human host and, through autoinfection, increase its numbers without having to pass through the insect host.
What is the diagnostic stage of Hymenolepis nana?
After four to five days, this infective larva will break free into the lumen of the small intestine and travel to the ileum where it will reattach itself to the intestinal mucosa. Within the next five days it will develop into a full adult worm. Besides humans, the house mouse is another possible definitive host.
How do you get Hymenolepis nana?
Hymenolepiasis is the most common intestinal tapeworm infection of humans caused by worm of family cestoda, genus Hymenolepis and species nana. This infection does not require an intermediate host and infection can occur directly from one infected person to another by fecal-oral transmission.
Is Hymenolepis nana a nematode?
Dwarf tapeworm (Hymenolepis nana, also known as Rodentolepis nana, 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.
What is the treatment of Hymenolepis nana?
Hymenolepis nana, a tiny intestinal tapeworm. Adults inhabit the intestines of definitive hosts, mammalian carnivores. Several of the adult tapeworms that infect… read more , is one of the most common human cestodes; infection is treated with praziquantel.
What are the typical symptoms of H nana infection?
Most people who are infected do not have any symptoms. Those who have symptoms may experience nausea, weakness, loss of appetite, diarrhea, and abdominal pain. Young children, especially those with a heavy infection, may develop a headache, itchy bottom, or have difficulty sleeping.
What are the symptoms of Hymenolepis nana?
What are the typical symptoms of H. nana infection?
How do you treat Hymenolepis nana?
Treatment
- Praziquantel, adults and children, 25mg/kg in a single-dose therapy.
- Niclosamide*: adults, 2 gm in a single dose for 7 days; children 11-34 kg, 1 gm in a single dose on day 1 then 500 mg per day orally for 6 days; children > 34 kg, 1.5 gm in a single dose on day 1 then 1 gm per day orally for 6 days.