| dead-end host | A host from which infectious agents are not transmitted to other susceptible host's. (05 Mar 2000) |
|---|---|
| definitive host | <epidemiology> The host in which a parasite reproduces sexually. (05 Dec 1998) |
| disease, graft-versus-host | A reaction of donated bone marrow against a patient's own tissue. Also called GVHD. (12 Dec 1998) |
| immunocompromised host | A human or animal whose immunologic mechanism is deficient because of an immunodeficiency disorder or other disease or as the result of the administration of immunosuppressive drugs or radiation. (12 Dec 1998) |
| intermediate host | <epidemiology> See vector. (05 Dec 1998) |
| transport host | An intermediate host in which no development of the parasite occurs, although its presence may be required as an essential link in the completion of the parasite's life cycle; e.g., the successive fish host's that carry the plerocercoid of Diphyllobothrium latum, the broad fish tapeworm, to larger food fish eventually eaten by man or other final host's. Synonym: transport host. (05 Mar 2000) |
| type host | <zoology> The host species with which the name-bearing type of a nominal species or subspecies was associated. (09 Jan 1998) |
| final host | <epidemiology> The host in which a parasite reproduces sexually. (05 Dec 1998) |
| active mutant | A mutant with overt phenotypic expression. (05 Mar 2000) |
| amber mutant | A mutant with a mutation resulting in a UAG codon. (05 Mar 2000) |
| auxotrophic mutant | Mutant with a nutritional requirement not present in the wild type organism. Synonym: defective organism, deficiency mutant. (05 Mar 2000) |
| gap mutant | <molecular biology> A fruit fly of the genus Drosophila which is missing a number of adjacent segments because the segments failed to develop. (09 Oct 1997) |
| rats, mutant strains | Rats bearing mutant genes which are phenotypically expressed in the animals. (12 Dec 1998) |
| virulent phage mutant | A mutant of a phage that is unable to establish lysogeny. (05 Mar 2000) |
| relaxed mutant | A mutant bacterium that continues to synthesise RNA in a medium that lackscertain nutrients or amino acids which that sort of bacterium normallyneeds present before it can make RNA. (09 Oct 1997) |