What is the final host of the Hymenolepis nana?

Humans are the definitive host of H. nana. Adult worms live in the ileum (1). Eggs are released from gravid proglottids through the genital atrium and passed in stool (2).

Does H. nana need intermediate host?

Intermediate hosts of Hymenolepis spp.

The arthropod intermediate host is required for H. diminuta, but not H. nana, and humans can become infected with the latter by direct ingestion of eggs.

What is H. nana in stool?

H. nana, also known as dwarf tapeworm, is a cyclophyllidean tapeworm with embryonated eggs. 2. It is probably the most prevalent tapeworm worldwide, and it is the only tapeworm that can be transmitted directly from human to human.

Does Hymenolepis nana spread?

H. nana infections are much more common than H. diminuta infections in humans because, in addition to being spread by insects, the disease can be spread directly from person to person by eggs in feces.

What disease does Hymenolepis nana cause?

The cestode, Hymenolepis nana, also called the dwarf tapeworm, causes hymenolepiasis, which is usually asymptomatic. Some weakness, headache, anorexia, and abdominal pain may occur. When passed in the stool, the eggs are infective and are ingested by beetles or flies, which serve as intermediary hosts.

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Where is Hymenolepis nana found in host?

The dwarf tapeworm or Hymenolepis nana is found worldwide. Infection is most common in children, in persons living in institutional settings, and in people who live in areas where sanitation and personal hygiene is inadequate.

Does eating crustaceans cause Diphyllobothriasis?

The tapeworm causing diphyllobothriasis (Diphyllobothrium latum) is widespread in North American freshwater fish, passing from crustacean to fish to humans by consumption of raw freshwater fish. It is especially common among Inuit peoples and may be asymptomatic or cause severe general and abdominal disorders.

What is the largest tapeworm ever removed from a human?

The longest tapeworm ever removed from a human was 82 feet long, and was removed from a patient in India. The man had complained of abdominal pain for several months and had anemia. A tapeworm is a parasite (Diphyllobothrium datum) that can live in the small intestine and has the ability to grow rapidly.

What is Hymenolepis nana infective stage?

Eggs of Hymenolepis nana are immediately infective when passed with the stool and cannot survive more than 10 days in the external environment .

How do you cure Nana?

Infection is treated with praziquantel or niclosamide. H. nana is only 15 to 40 mm long. It differs from other tapeworm because it requires only one host, but can also cycle through two.

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.

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How long can a tapeworm live?

Adult tapeworms can measure more than 80 feet (25 meters) long and can survive as long as 30 years in a host. Some tapeworms attach themselves to the walls of the intestines, where they cause irritation or mild inflammation, while others may pass through to your stool and exit your body.

How is Hymenolepis transmitted?

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.

Can you poop out tapeworms?

Once inside the body, the tapeworm head attaches to the inner wall of the intestines and feeds off the food being digested. Pieces of the tapeworm break off and come out of the body in feces (poop), along with the eggs they contain.

Can humans get Dipylidium caninum?

Dipylidium caninum is a common tapeworm of dogs and cats, but is occasionally found in humans. It has many common names including the “flea tapeworm”, “cucumber tapeworm”, and “double-pored tapeworm”.

What disease does clonorchis sinensis cause?

Clonorchiasis is a serious food-borne parasitic disease caused by C. sinensis infection, and humans become infected by C. sinensis after ingesting raw or semi-raw freshwater fish and shrimp that contain infective metacercariae [1].