Echinococcus Granulosus

Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

Echinococcus Granulosus


a tapeworm that in the adult stage parasitizes the intestines of dogs, wolves, jackals, and occasionally cats. The body measures 3–5 mm in length and consists of a scolex with four suckers and two crowns of hooks and three or four segments. The last segment, the only mature section, constitutes half the body length.

The tapeworm’s eggs emerge from the host’s intestine with excrement and may remain on its fur. The intermediate host, which may be a cow, sheep, pig, or other animal, or a human being, becomes infested by swallowing the eggs. The larva (oncosphere) emerges from the egg while in the intestine of the intermediate host. It penetrates into the portal vein system through the intestinal wall and is carried by the blood to the liver or, in some cases, to the lungs, muscles, bones, and other organs, where it develops into a hydatid. Every oncosphere creates a cyst, and secondary and tertiary cysts form on its walls. Numerous scolices similar to those of adult worms form on the secondary and tertiary cysts. The cysts grow very slowly and become quite large. The definitive host becomes infected by eating the flesh of a diseased or dead animal and ingesting a worm in the hydatid stage.

The varied structure of the hydatid stages of E. granulosus suggests there may be two independent species, E. unilocularis and E. multilocularis. The latter is sometimes recognized as an independent genus, Alveococcus.

References in periodicals archive ?
By attention to not isolation the eggs of Trichuris vulpis and Dipylidium caninum and Echinococcus granulosus in pet dogs can such comprehension that anti parasitic therapy program, type and quality of nutrition, hygienic systems and act was with success in pet dogs.
Initial establishment of sheep model with Echinococcus granulosus infection.
On the biology and morphology of Echinococcus granulosus (Batsch, 1786) of buffalo- dog origin.
Poor breeding selection management deficiencies and prevalence of many parasites such as Echinococcus granulosus affects the livestock productivity (Bhattacharya et al.
Hydatid disease is a parasitic infestation caused by the larval form of Echinococcus granulosus.
Fasciola hepatica, Trichinella spiralis, Taenia solium, Echinococcus granulosus, and cutaneous and blood microfilariae; 4) symptoms associated with VLM (respiratory signs, such as asthma, dyspnea, and eosinophilic pneumonia; dermatologic symptoms, including pruritus and recurrent urticaria; and abdominal symptoms, including abdominal pain and hepatomegaly); and 5) response to treatment with albendazole (10-15 mg/kg/d in 2 doses orally for 5 days) assessed 6 months after treatment, decreased titers to Toxocara sp.
El hombre es considerado como un hospedador intermediario accidental tras la ingestion de huevos de Echinococcus granulosus por el contacto con perros parasitados (Larrieu et al.
The hepatitis screen was negative, and serology for Entamoeba histolytica and Echinococcus granulosus was also negative.
Algunos helmintos intestinales de caninos como: Dipylidium caninum, Echinococcus granulosus, Toxocara canis, y Ancylostoma spp.
There are predominantly two species affecting the human population; Echinococcus granulosus and Echinococcus multilocularis causing Cystic Echinococcosis (Hydatid disease) and Alveolar Echinococcosis respectively.
Abstract- Modulation of the immune response is an important strategy in hosts chronically infected with Echinococcus granulosus which modulates the response of the host immune system for long periods of time.