definitive host


Also found in: Dictionary, Thesaurus, Legal, Encyclopedia, Wikipedia.
Related to definitive host: paratenic host, reservoir 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.

de·fin·i·tive host

one in which a parasite reaches the adult or sexually mature stage.
Synonym(s): final host

definitive host

n.
An organism in or on which a parasite reaches sexual maturity.

definitive host

any host organism in which a parasite reproduces sexually. The female Anopheles mosquito is the definitive host for malaria. Humans are definitive hosts for pinworms, schistosomes, and tapeworms. Also called primary host. Compare dead-end host, intermediate host, reservoir host. See also host.

de·fin·i·tive host

(dĕ-fin'i-tiv hōst)
One in which a parasite reaches the adult or sexually mature stage.

definitive host

the host in which the infectious agent in question undergoes the adult and sexual stage of its reproduction. Called also final host.
References in periodicals archive ?
Other filarioid nematodes live in their definitive hosts from 2->10 years (review by Gems 2000).
Leptophis ahaetulla and Chironius gran-disquamis represent new definitive host records for K.
Sarcocystis species are generally not pathogenic for the definitive hosts, which include carnivores, domestic and wild omnivores, and humans.
Should the intermediate/paratenic hosts prove to be the source of this dog's infection, then Canis familiaris should be regarded as a natural host and should be added to the list of regular definitive hosts of M.
Diagrams which were developed to depict the life cycle strategies of helminths infecting these two species of frogs as definitive hosts (Figs.
When eaten by an appropriate definitive host, third-stage larvae evolve to adults and finally reach the stomach of their host.
norvegicus rats are the major definitive host for A.
in which pigeons are infected by ingestion of sporocysts shed in feces from an unidentified definitive host (8).
cantonensis in definitive host rats, we collected 187 Rattus norvegicus rats and 121 R.
The house cat was therefore implicated as playing an important role as definitive host and as a potential risk to humans.
The red fox (Yulpes vulpes), the main definitive host of E.