What does Hymenolepis nana cause?

What 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.

What is unique about Hymenolepis nana?

Hymenolepis nana is unique among tapeworms in that the adult worm develops after the egg is ingested. The hooked oncosphere then invades the intestinal mucosa and develops into a cysticeroid larva.

What is the reason of persistent infection caused by H. nana in humans?

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.

Does Hymenolepis nana cause Autoinfection?

nana eggs are infectious immediately when passed. In addition to being a risk to others, infected people may reingest their own eggs by fecal-hand-mouth transfer (i.e., external autoinfection), or eggs may hatch in the intestine, reinvade, and develop into new worms (i.e., internal autoinfection).

What is the treatment of H 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.

How do you get hymenolepis Nana?

This can happen by ingesting fecally contaminated foods or water, by touching your mouth with contaminated fingers, or by ingesting contaminated soil. People can also become infected if they accidentally ingest an infected arthropod (intermediate host, such as a small beetle or mealworm) that has gotten into food.

What is the shortest tape worm?

E. granulosus is the smallest of the tapeworms (3-9 mm long) and it only has three proglottids.

How do you identify hymenolepis Nana?

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.

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.

How do you identify Hymenolepis nana?

What is the infective stage of H Nana?

The oncosphere will infiltrate the villa of the intestinal lining, and soon after will become a cysticercoid larva. 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.

How big is the head of Hymenolepis nana?

Hymenolepiasis – a disease that develops when the parasitic in the human intestine tape worm Hymenolepis nana, or dwarf tapeworm. The worm length from a few millimeters to 5 cm consists of a spherical head (scolex), neck and ribbon-like body — strobili.

Can a Hymenolepis diminuta be passed to a human?

Hymenolepis diminuta is a cestode of rodents infrequently seen in humans and frequently found in rodents. Eggs of Hymenolepis nana are immediately infective when passed with the stool and cannot survive more than 10 days in the external environment .

What kind of tapeworm is Hymenolepsis nana?

Hymenolepsis infection is an infestation by one of two species of tapeworm: Hymenolepis nana or Hymenolepis diminuta. The disease is also called hymenolepiasis. Hymenolepis live in warm climates and are common in the southern United States.

How is hymenolepiasis transmitted from person to person?

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.