| tissue culture infectious dose | The quantity of a cytopathogenic agent, such as a virus, that will produce a cytopathic effect in 50% of the cultures inoculated. (05 Mar 2000) |
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| tissue culture plastic | <cell culture> Polystyrene that has been rendered wettable by oxidation, a treatment that increases its adhesiveness for cells from animal tissues and without which anchorage dependent cells will not grow. Commercially achieved by treatment known as glow discharge. (18 Nov 1997) |
| elective culture | A method of isolating microorganisms capable of utilizing a specific substrate by incubating an inoculum in a medium containing the substrate; the medium usually contains substances or has characteristics that inhibit the growth of unwanted microorganisms. Synonym: enrichment culture. (05 Mar 2000) |
| enrichment culture | <cell culture, microbiology> Use of selective culture media and incubation conditions to isolate microorganisms directly from nature. (09 Oct 1997) |
| type culture | A type strain of microorganism preserved in a culture collection as the standard. (05 Mar 2000) |
| faecal culture | <investigation, microbiology> A test used to identify pathogenic organisms in the stools that may be responsible for gastroenteritis. Often performed in cases of unexplained diarrhoea. May indicate bacterial, viral or parasitic disease. Cultures are also helpful in assisting the selection an appropriate antibiotic agent. See: traveler's diarrhoea. (27 Sep 1997) |
| Loeffler's blood culture medium | A culture medium consisting of beef blood serum, sheep blood serum, and beef bouillon containing peptone, glucose, and sodium chloride; used for the isolation of Corynebacterium diphtheriae. (05 Mar 2000) |
| Lowenstein-Jensen culture medium | Primary mycobacterial recovery media composed of fresh whole eggs, defined salts, glycerol, potato flour, and malachite green (as an inhibitory agent). Synonym: Lowenstein-Jensen medium. (05 Mar 2000) |