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Definition of Parasite from MedicineNet
Parasite: An organism that lives in or on and takes its nourishment from another organism. A parasite cannot live independently.
Parasitic diseases include infections by protozoa, helminths, and arthropods:
* Protozoa -- Malaria is caused by plasmodium, a protozoa, a single-cell organism that can only divide within its host organism.
* Helminths -- Schistosomiasis, another set of very important parasitic diseases, is caused by a helminth (a worm).
* Arthropods -- The arthropods include insects and arachnids (spiders, etc.), a number of which can act as vectors (carriers) of parasitic diseases.
The term "parasite" came from the Greek "parasitos" (para-, along side of + sitos, food) meaning "eating at the side of, as at the same table." The sense of the term later changed to that of a poor friend or relative who lived at the expense of another. Not until the 18th century did "parasite" come into English as a biologic term.
The study of parasites is parasitology.
Definition of Parasitic
Parasitic: Having to do with a parasite, as in a parasitic infection; or acting like a parasite by taking nourishment from another.
Definition of Parasite from MERCK
parasite (par´ә-sīt) a plant or animal that lives upon or within another living organism at whose expense it obtains some advantage; see also symbiosis. Parasites include multicelled and single-celled animals, fungi, and bacteria, and some authorities also include viruses. Those that feed upon human hosts can cause diseases ranging from the mildly annoying to the severe or even fatal. adj., parasit´ic., adj.
I don't know how many different ways we can say it for you when they mean the same thing.
Parasite: An organism that lives in or on and takes its nourishment from another organism. A parasite cannot live independently.
Parasitic diseases include infections by protozoa, helminths, and arthropods:
* Protozoa -- Malaria is caused by plasmodium, a protozoa, a single-cell organism that can only divide within its host organism.
* Helminths -- Schistosomiasis, another set of very important parasitic diseases, is caused by a helminth (a worm).
* Arthropods -- The arthropods include insects and arachnids (spiders, etc.), a number of which can act as vectors (carriers) of parasitic diseases.
The term "parasite" came from the Greek "parasitos" (para-, along side of + sitos, food) meaning "eating at the side of, as at the same table." The sense of the term later changed to that of a poor friend or relative who lived at the expense of another. Not until the 18th century did "parasite" come into English as a biologic term.
The study of parasites is parasitology.
Definition of Parasitic
Parasitic: Having to do with a parasite, as in a parasitic infection; or acting like a parasite by taking nourishment from another.
Definition of Parasite from MERCK
parasite (par´ә-sīt) a plant or animal that lives upon or within another living organism at whose expense it obtains some advantage; see also symbiosis. Parasites include multicelled and single-celled animals, fungi, and bacteria, and some authorities also include viruses. Those that feed upon human hosts can cause diseases ranging from the mildly annoying to the severe or even fatal. adj., parasit´ic., adj.
I don't know how many different ways we can say it for you when they mean the same thing.