| heteroxenous parasite | A parasite that has more than one obligatory host in its life cycle. (05 Mar 2000) |
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| host-parasite relations | The interactions between two organisms, one of which lives at the expense of the other. (12 Dec 1998) |
| specific parasite | A parasite that habitually lives in its present host and is particularly adapted for the host species. (05 Mar 2000) |
| stenoxous parasite | A parasite with a narrow or specific host range. (05 Mar 2000) |
| incidental parasite | A parasite that normally lives on a host other than its present host. (05 Mar 2000) |
| quartan parasite | A protozoan parasite that occurs primarily in subtropical and temperate areas. It is the causal agent of quartan malaria. As the parasite grows it exhibits little ameboid activity. (12 Dec 1998) |
| inquiline parasite | See: inquiline. (05 Mar 2000) |
| obligate parasite | A parasite that cannot lead an independent nonparasitic existence, in contrast to facultative parasite. (05 Mar 2000) |
| temporary parasite | An organism accidentally ingested that survives briefly in the intestine. (05 Mar 2000) |
| tertian parasite | A protozoan parasite that causes vivax malaria (malaria, vivax). This species is found almost everywhere malaria is endemic and is the only one that has a range extending into the temperate regions. (12 Dec 1998) |
| euroxenous parasite | A parasite with a broad or non-specific host range. (05 Mar 2000) |
| facultative parasite | An organism that may either lead an independent existence or live as a parasite, in contrast to obligate parasite. (05 Mar 2000) |