oncosphere

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oncosphere

[ong´ko-sfēr]

the larva of the tapeworm contained within the external embryonic envelope and armed with six hooks.

hex·a·canth

(hek'să-kanth),

The motile six-hooked first-stage larva of cyclophyllidean cestodes; it emerges from the egg and actively claws its way through the intermediate host's intestine before development into the next larval stage; for example, the hexacanth of Taenia saginata, which penetrates the intestine of a cow that ingested the egg, then forms a cysticercus in the muscles of the intermediate host.

Synonym(s): oncosphere

[hexa- + G. akantha, hook or thorn]

oncosphere

/on·co·sphere/ (ong´ko-sfēr) the larva of the tapeworm contained within the external embryonic envelope and armed with six hooks.

oncosphere

the larva of the tapeworm contained within the external embryonic envelope within the egg and armed with six hooks. Called also onchosphere.

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References in periodicals archive ?

After ingestion, the eggs reach the intestine of infected animals (intermediate hosts), the oncospheres (larvae) are released, penetrate the intestinal wall, and enter the circulation.

Chapter 6 Parasitic zoonoses

Gauci CG, Lightowlers MW Alternative splicing and sequence diversity of transcripts from the oncosphere stage of Taenia solium with homology to the 45W antigen of Taenia ovis.

Immunodiagnosis of cysticercosis in China

After the entry of embryos (oncospheres) into the blood stream, the oncosphere can invade various organs and develop into a Hydatid Cyst.

Nephron sparing surgery in renal hydatidosis: an experience

The oncosphere embryos emerge from the eggs, penetrate the intestinal wall, and are disseminated by the bloodstream to various tissues where the larval stage, or cysticercus, develops.

Deaths from cysticercosis, United States

In our opinion, this is explained by the constant character of the invasion by oncospheres during the life time of the sheep.

Impact of Echinococcosis on quality of sheep meat in the South Eastern Kazakhstan

The eggs hatch in the animal's gastro intestinal tract called oncospheres, and these penetrate in intestinal wall, enter into bloodstream and from blood to vital organs of the body, where they develop watery 'blisters' called hydatid cysts.

Study of human cystic echinococcosis in hyderabad, Pakistan

The oncospheres hatch in the intestine, penetrate the intestinal wall and disseminate to almost anywhere in the body.

Negative indirect hemagglutination (IHA) test neurocysticercosis in a buddhist's cerebellar hemisphere

Upon ingestion, tapeworm eggs release oncospheres, which invade the intestinal wall and disseminate through the bloodstream to form cysts throughout the body.

Seroprevalence of antibodies against Taenia solium cysticerci among refugees resettled in United States

The migration of oncospheres of Taenia pisiformis, T.

The many faces of hydatid disease

The protector effect of homologous oncospheres to infection of Hymenolepis nana var.

Efecto protector de oncosferas homologas en la infeccion por Hymenolepis nana var. nana

Oncospheres can then hatch within the bowel and from there seed remote tissue, where they develop into cysticerci.

A large subcutaneous cyst in a Haitian man. (Pathologic Quiz Case)

Upon ingestion of eggs, oncospheres escape from the eggs, penetrate the gut wall and enters the circulation and form fluid filled bladder like cysts in various tissues called coenurus.