parasite (redirected from obligate parasite, obligatory parasite)

parasite /par·a·site/ (par´ah-sīt)

1. a plant or animal that lives upon or within another living organism at whose expense it obtains some advantage; see symbiosis.

2. the smaller, less complete member of asymmetrical conjoined twins, attached to and dependent upon the autosite.parasit´ic

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malarial parasite  Plasmodium.

obligatory parasite  one that is entirely dependent on a host for its survival.

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par·a·site (pr-st)

n.

1. An organism that grows, feeds, and is sheltered on or in a different organism while contributing nothing to the survival of its host.

2. In conjoined twins, the usually incomplete twin that derives its support from the more nearly normal fetus.

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Parasite

An organism that lives in or with another organism, called the host, in parasitism, a type of association characterized by the parasite obtaining benefits from the host, such as food, and the host being injured as a result.

Mentioned in: Antihelminthic Drugs, Antimalarial Drugs, Antiprotozoal Drugs, Babesiosis, Brucellosis, Chagas' Disease, Cryptosporidiosis, Cyclosporiasis, Fluke Infections, Stool O & P Test, Vulvovaginitis

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parasite

[per′əsīt]

Etymology: Gk, parasitos, guest

1 an organism living in or on and obtaining nourishment from another organism. A facultative parasite may live on a host but is capable of living independently. An obligate parasite is one that depends entirely on its host for survival.

2 See parasitic fetus. parasitic, adj.

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parasite,

n an organism living in or on and obtaining nourishment from another organism.

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parasite

a plant or animal that lives upon or within another living organism at whose expense it obtains some advantage. See also symbiosis.

Among the many parasites in nature, some feed upon animal hosts, causing diseases ranging from the mildly annoying to the severe and often fatal. Parasites include multicelled and single-celled animals, fungi and bacteria. Viruses are sometimes considered to be parasites. However, the commonest use of the word refers to the multicellular helminth, arachnid, crustacean (copepod) and arthropod parasites.

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accidental parasite

one that parasitizes an organism other than the usual host.

facultative parasite

one that may be parasitic upon another organism but can exist independently.

incidental parasite

accidental parasite.

obligate parasite, obligatory parasite

one that is entirely dependent upon a host for its survival.

periodic parasite

one that parasitizes a host for short periods.

temporary parasite

one that lives free of its host during part of its life cycle.

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parasite

Infectious disease 1. A disease-causing organism 2. An organism with an obligatory dependence on a host, to the host's detriment. See Microparasite, Opportunistic parasite.

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Patient discussion about obligate parasite, obligatory parasite.

Q. is an Amoeba dangerous?? and how can i get rid of it? my son is in Peru, he called and told me he got an Amoeba..i have no idea if it's dangerous or not, and how to get rid of it. and what kinds of food he needs to avoid.I'll appreciate help!

A. oooo...an Amoeba is a nasty one...but not so dangerous! it's a one celled parasite which gets into your body if you eat in restaurants that the cook doesn't wash hands after going to the bathroom..it multiplies in your intestine and makes you diarrhea like hell. but if you'll treat it right it will go away as nothing happened. if you don't it can give you liver cyst. and that's not good. he should see a Dr.