intermediate host

(redirected from intermediary host)
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Related to intermediary host: paratenic host, reservoir host, final host

host

 [hōst]
1. an animal or plant that harbors and provides sustenance for another organism (the parasite).
2. the recipient of an organ or other tissue derived from another organism (the donor).
accidental host one that accidentally harbors an organism that is not ordinarily parasitic in the particular species.
definitive host (final host) a host in which a parasite attains sexual maturity.
intermediate host a host in which a parasite passes one or more of its asexual stages; usually designated first and second, if there is more than one.
paratenic host a potential or substitute intermediate host that serves until the appropriate definitive host is reached, and in which no development of the parasite occurs; it may or may not be necessary to the completion of the parasite's life cycle.
host of predilection the host preferred by a parasite.
primary host definitive host.
reservoir host an animal (or species) that is infected by a parasite, and which serves as a source of infection for humans or another species.
secondary host intermediate host.
transfer host one that is used until the appropriate definitive host is reached, but is not necessary to completion of the life cycle of the parasite.

in·ter·me·di·ate host

, intermediary host
1. one in which larval or developmental stages occur;
2. a host through which a microorganism can pass or which contains an asexual stage of a parasite.
Synonym(s): secondary host

intermediate host

n.
An organism in or on which a parasite develops to an adult but not sexually mature stage.

in·ter·me·di·ate host

, intermediary host (in'tĕr-mē'dē-ăt hōst, in'tĕr-mē'dē-ar-ē)
1. One in which larval or developmental stages occur.
2. A host through which a microorganism can pass or contains an asexual stage of a parasite.

intermediate host

any host upon which a parasite spends that part of its life cycle in which it is not sexually active.
References in periodicals archive ?
Veronicillidaeor Strophochelidae) and vertebrates from the Orders Carnivora (especially Canis and Felis) and Rodentia (such Rattus) as intermediary hosts (8, 13, 19).Therefore, it is to be expected that African snails would interact with helminths present in the ecosystems they invade, although we should not rule out the possibility of introduction of parasites from the mollusk's place of origin (14).
Since 1580, there have been 31 instances where new influenza viruses have emerged from their natural reservoir--wild aquatic birds--and through genetic reassortment in intermediary hosts such as pigs, have "jumped" to human populations with marked increases in human deaths.
The importance of molluscs in the global ecological niche is addressed from several angles, including parasitology, an area that has been overlooked despite the fact that these organisms are important intermediary hosts to parasites that afflict humans and other vertebrates.
Moreover, the other intermediary hosts of the fish tapeworm, the calanoid copepods Diaptomus diabolicus and Boeckela gracilipes, are also abundant (16).