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parasite is an organism that lives on or in a host
and gets its food from or at the expense of its
host. Parasites can cause disease in humans.
Parasitism is a non-mutual symbiotic relationship
between species.
Parasite
also includes microparasites, which are typically
smaller, such as viruses and bacteria. Some
examples of parasites include the plants mistletoe
and cuscuta, and animals such as hookworms.
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