Definitions for echinococcus
This page provides all possible meanings and translations of the word echinococcus
tapeworms whose larvae are parasitic in humans and domestic animals
a parasite of man and of many domestic and wild animals, forming compound cysts or tumors (called hydatid cysts) in various organs, but especially in the liver and lungs, which often cause death. It is the larval stage of the Taenia echinococcus, a small tapeworm peculiar to the dog
Origin: [NL., fr. Gr. 'echi^nos hedgehog, sea urchin + ko`kkos grain, seed, berry. So called because forming little granular bodies, each armed with hooklets and disposed upon the inner wall of the hydatid cysts.]
The genus Echinococcus includes six species of cyclophyllid tapeworms to date, of the family Taeniidae. Infection with Echinococcus results in hydatid disease, also known as echinococcosis. Echinococcus is triploblastic, i.e. it has 3 layers- outermost ectoderm, middle mesoderm and inner endoderm. Anus is absent; and no digestive system. Body is covered by tegument and the worm is divided into scolex, short neck and 3-6 proglottids. Body is ribbon-like. In humans, this causes a disease called echinococcosis. There are 3 types of echinococcosis i.e. cystic echinococcosis caused by Echinococcus granulosus, alveolar echinococcosis caused by E. multilocularis and polycystic echinococcosis caused by E. vogeli and/or E. oligarthrus. Incubation period is usually long and can be up to 50 years. Cystic echinococcosis is mostly found in South and Central America, Africa, the Middle East, China, Italy, Spain, Greece, Russia and the West of the United States. Echinococcosis is a zoonosis; humans are dead-end hosts. The definitive hosts are carnivorous predators - dogs, wolves, foxes, lions. The adult tapeworm lives in their small intestine and delivers eggs that are excreted with the stool. The intermediate hosts are infected by ingesting eggs. Sheep, goat, cattle, camel, pig, wild herbivores and rodents are the usual intermediate hosts, but humans can also be infected.
U.S. National Library of Medicine
A genus of very small TAPEWORMS, in the family Taeniidae. The adult form is found in various CARNIVORA but not humans. The larval form is seen in humans under certain epidemiologic circumstances.
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"echinococcus." Definitions.net. STANDS4 LLC, 2015. Web. 5 Aug. 2015. <http://www.definitions.net/definition/echinococcus>.