What is the difference between H. nana and H. diminuta?

What is the difference between H. nana and H. diminuta?

diminuta tapeworm is much larger than H.nana and measures 10 to 60 cm long and 2 to 4 mm wide. Completion of the life cycle of H. diminuta depends on development of the cysticercoid stage in the body cavities of insects that ingest eggs they find in rodent feces; autoinfection does not occur.

What disease does Hymenolepis diminuta cause?

Hymenolepsis infection is an infestation by one of two species of tapeworm: Hymenolepis nana or Hymenolepis diminuta. The disease is also called hymenolepiasis.

What is the infective stage of H. diminuta?

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 is a major morphological difference between Hymenolepis diminuta and Hymenolepis nana?

Hymenolepis diminuta is larger than H. nana, 2060 mm long and 34 mm wide. The scolex of H. diminuta also has four suckers but the rostellum is unarmed it has no hooks.

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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 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.

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.

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.

How can we prevent Hymenolepis nana?

Prevention. Good hygiene, public health and sanitation programs, and elimination of infected rats help to prevent the spread of hymenolepiasis. Preventing fecal contamination of food and water in institutions and crowded areas is of primary importance.

How is Diphyllobothriasis presented?

Most humans with diphyllobothriasis (all forms) are asymptomatic, and the most common presentation is passage of worm parts, which can be alarming. Many patients retrospectively report diarrhea or may present with symptoms of obstruction or even appendicitis.

Which of the following is characteristic of an H Diminuta egg?

Eggs of Hymenolepis diminuta. These eggs are round or slightly oval, size 70 85 m X 60 80 m, with a striated outer membrane and a thin inner membrane. The space between the membranes is smooth or faintly granular. The oncosphere has six hooks.

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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.

Is hymenolepis Diminuta zoonotic?

Hymenolepis diminuta is a zoonotic cestode parasitizing the small intestine of rodents (definitive hosts). Humans can accidentally enter into the life cycle of this tapeworm via the ingestion of infected insects (intermediate hosts) containing cestode cysticercoids in their body cavity.

Why is hymenolepis Nana called dwarf tapeworm?

Infection with the dwarf tapeworm (so-called because of its small size) Hymenolepis nana occurs worldwide, mostly in children living in conditions with poor sanitation.

Why are humans rarely the definitive host for H Diminuta?

Humans can only accidentally enter into the life cycle of H. diminuta, acting as definitive hosts when they ingest infected arthropods containing its cysticercoid larvae, which is the reason why this infection in humans is so uncommon [1].

How is diphyllobothriasis diagnosed?

How is infection with Diphyllobothrium diagnosed? Diagnosis is made by identification of eggs or segments of the tapeworm in a stool sample with a microscope. Eggs are usually numerous, but more than one stool sample may be needed to find them.

What causes Sparganosis?

Humans acquire sparganosis by either drinking water contaminated with infected copepods or consuming the flesh of an under-cooked second intermediate or paratenic host. Spargana can live up to 20 years in the human host.

Which worm causes megaloblastic?

Untreated, fish tapeworm infection may cause the following: Megaloblastic anemia (anemia caused by vitamin B12 deficiency)

How do you treat H Nana?

Treatment of Hymenolepis nana Infection

  1. Praziquantel.
  2. Alternatively, nitazoxanide or, outside the US, niclosamide.
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Can tapeworms reproduce inside you?

Tapeworms absorb nutrients directly across their skin (cuticle). They also reproduce inside us.

What causes Paragonimiasis?

Parasites – Paragonimiasis (also known as Paragonimus Infection) Paragonimus is a lung fluke (flatworm) that infects the lungs of humans after eating an infected raw or undercooked crab or crayfish. Less frequent, but more serious cases of paragonimiasis occur when the parasite travels to the central nervous system.

What is the diagnostic procedure in the identification of H Diminuta infection?

H. diminuta is 20 to 60 cm in length. Human infection is usually asymptomatic, it but can cause mild gastrointestinal symptoms. Diagnosis is by finding characteristic eggs in stool.

What is the smallest tapeworm infecting man?

Hymenolepis nana, the dwarf tapeworm, is the smallest and a common tapeworm in humans worldwide. H. nana infection occurs more frequently in warm climates and temperate zones such as Asia [1], Central and South America [2,3], and Eastern Europe [4].

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.

How do you get strongyloides?

Strongyloidiasis is caused by the parasitic roundworm S. stercoralis. This worm infects mainly humans. Most humans get the infection by coming into contact with contaminated soil.

What is the medicine for Nana?

Drugs used to treat Dwarf Tapeworm Infection (Hymenolepis nana)

Drug name Rating
View information about Biltricide Biltricide Rate
Generic name: praziquantel systemic Drug class: anthelmintics For consumers: dosage, interactions, side effects For professionals: Prescribing Information
View information about Alinia Alinia Rate

How does pinworm affect the body?

Pinworm infection (called enterobiasis or oxyuriasis) causes itching around the anus which can lead to difficulty sleeping and restlessness. Symptoms are caused by the female pinworm laying her eggs. Symptoms of pinworm infection usually are mild and some infected people have no symptoms.