| L-[form] | a defective bacterial variant that can multiply on hypertonic medium |
|---|---|
| VDI | virus defective interfering [particle] |
| WDMF | wall-defective microbial forms |
| CFW | Carworth farm [mouse], Webster strain |
| col | collection; colicin; collagen; colony; colored; column; strain [Lat. cola] |
| defective probacteriophage | See: defective bacteriophage. (05 Mar 2000) |
|---|---|
| defective prophage | A temperate bacteriophage mutant whose genome does not contain all of the normal components and cannot become fully infectious virus, yet can replicate indefinitely in the bacterial genome as defective probacteriophage; many defective bacteriophage's are mediators of transduction. Synonym: defective phage. (05 Mar 2000) |
| defective virus | <virology> A virus genetically deficient in replication, but that may nevertheless be replicated when it co-infects a host cell in the presence of a wild type helper virus. most acute transforming retroviruses are defective, since their acquisition of oncogenes seems to be accompanied by deletion of essential viral genetic information. (18 Nov 1997) |
| defective viruses | Viruses which lack a complete genome so that they cannot completely replicate or cannot form a protein coat. Some are host-dependent defectives, meaning they can replicate only in cell systems which provide the particular genetic function which they lack. Others, called satellite viruses, are able to replicate only when their genetic defect is complemented by a helper virus. (12 Dec 1998) |
| brucella strain 19 vaccine | A live bacterial vaccine prepared from an attenuated variant strain of Brucella abortus (strain 19); used for vaccinating cattle against brucellosis. (05 Mar 2000) |
| recombinant strain | <molecular biology> A cell or an individual with a new combination of genes not found together in either parent, usually applied to linked genes. (18 Nov 1997) |
| carrier strain | A bacterial strain that is contaminated with a bacteriophage of low infectivity. Synonym: pseudolysogenic strain. (05 Mar 2000) |
| cell strain | <cell culture> Cells adapted to culture, but with finite division potential. See: cell line. (26 Mar 1998) |
| voice strain | The development of hoarse voice secondary to overuse. (27 Sep 1997) |
| rough strain | <microbiology> Bacterial strains that have altered outer cell wall carbohydrate chains causing colonies on agar to change their appearance from smooth to dull. In Streptococci the smooth strains are virulent whereas the rough strains are not. This is partly because the rough strains are much more readily phagocytosed. (17 Dec 1997) |
| wild strain | <virology> A viral strain found naturally, as opposed to one created in the laboratory. (09 Oct 1997) |
| wild-type strain | A strain found in nature or a standard strain. See: auxotrophic strains, prototrophic strains. (05 Mar 2000) |
| congenic strain | An inbred strain of animals produced by continued crossing of a gene of one line onto another inbred (isogenic) line. (05 Mar 2000) |
| muscle strain | An acute tearing injury to muscle. Usually associated with a small amount of bleeding (haematoma) into the injured muscle tissue. (27 Sep 1997) |
| crippled strain | <microbiology> A strain of bacteria, typically highly pathogenic, that has been genetically engineered so that it cannot survive on anything but a veryspecialised medium of nutrients, this is done so that geneticists can experiment on certain pathogens without the risk that they will escape fromthe lab. (09 Oct 1997) |