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parasitism |
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parasitism: see parasite parasite, plant or animal that at some stage of its existence obtains its nourishment from another living organism called the host. Parasites may or may not harm the host, but they never benefit it. ..... Click the link for more information. . parasitismRelationship between two species in which one benefits at the expense of the other. Ectoparasites live on the body surface of the host; endoparasites live in their hosts' organs, tissues, or cells and often rely on a third organism (the carrier, or vector) to transmit them to the host. The cuckoo and cowbird practice brood parasitism, laying eggs in other birds' nests to be raised by the foster parents. In social parasitism, one type of animal parasitizes animals of the same type (e.g., one ant species on different ant species). Hyperparasitism occurs when parasites are parasitized (e.g., protozoans hyperparasitize a flea on a dog). See also predation. |
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Ticks are blood-sucking ectoparasites of the class Arachnida. Ticks or other ectoparasites that are widely distributed in Florida could also serve as vectors. We studied chlorpyrifos, an insecticide present in a commercial dip for treating ectoparasites in dogs, to estimate the amount of transferable residues that children could obtain from their treated pets. |
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Ectoparasites
