What is the scolex of Hymenolepis Nana?

What is the scolex of Hymenolepis Nana?

Scolex of Hymenolepis nana. The H. nana scolex has four suckers and a single circle of up to 30 hooks. Morphologically it is similar to Taenia saginata but can be distinguished by the absence of hooks in the latter.

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 causes hymenolepis Nana?

How did I get infected? One becomes infected by accidentally ingesting dwarf tapeworm eggs. This can happen by ingesting fecally contaminated foods or water, by touching your mouth with contaminated fingers, or by ingesting contaminated soil.

What serves to the differentiate the ova of hymenolepis Nana from Hymenolepis Diminuta?

Eggs of Hymenolepis nana. These eggs are oval and smaller than those of H. diminuta, with a size range of 30 to 50 µm. On the inner membrane are two poles, from which 4-8 polar filaments spread out between the two membranes.

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.

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.

How do you treat Hymenolepis nana?

Treatment

1. Praziquantel, adults and children, 25mg/kg in a single-dose therapy.
2. 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.

What is the larval stage of 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 morphology of Hymenolepis nana?

Morphology. As its name implies (Ancient Greek: νᾶνος, nānos – dwarf), it is a small species, seldom exceeding 40 mm long and 1 mm wide. The scolex bears a retractable rostellum armed with a single circle of 20 to 30 hooks. The scolex also has four suckers, or a tetrad.

What is scolex in tapeworm?

The head of tapeworms, scolex, contains structures, such as grooves, suckers or hooks, which enable the worm to attach to the gut wall. The major part of the tapeworm is called strobila and it consists of segments, proglottids. They each contain both male and female reproductive organs.