Enrichment Culture


Also found in: Dictionary, Thesaurus, Medical, Financial.
Related to Enrichment Culture: Lithotroph

enrichment culture

[in′rich·mənt ‚kəl·chər]
(microbiology)
A medium of known composition and specific conditions of incubation which favors the growth of a particular type or species of bacterium.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Enrichment Culture

 

a culture containing microorganism cells grown on a selective nutrient medium. Enrichment cultures were proposed by the Russian microbiologist S. N. Vinogradskii. The special composition of the nutrient media creates conditions that promote the growth of microorganisms with certain physiological properties. For example, when soil, water, or sediment from a body of water is cultured on a medium containing glucose and several mineral salts but no nitrogen compounds, nitrogen-fixing microorganisms begin to grow in the culture. Enrichment cultures of bacteria that decompose cellulose can be obtained on a medium containing cellulose as the sole source of carbon.

Enrichment cultures must always be prepared before pure cultures of the microorganisms can be isolated. They can be obtained in the presence of growth factors, such as vitamins and amino acids, by adding a smaller number of bacterial cells to the medium. As a result, four to ten times more microorganisms can be found in soil and water than when they are cultured on media lacking growth factors.

A. A. IMSHENETSKII

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Table 1: Days that were taken to break the filter paper strips down by every generation of enrichment cultures from different sources during the continuously transferring over 8 months
DNA was extracted directly from the samples, enrichment cultures as well as E.
Modified TSB enrichment cultures were streaked on both SMAC and CTSMAC.
Metabolic by products of anaerobic toluene degradation by sulfate-reducing enrichment cultures. Appl Environ Microbiol 58:3192-3195.
A diagnosis of botulism was established 19 days after onset of symptoms by detection of toxin type B in stool enrichment cultures. The patient was treated with BIG-IV and discharged after 16 days; the infant recovered fully.
A Dehalococcoides-dominated enrichment culture, YN3, was newly established from a CE-contaminated river sediment and efficiently dechlorinated 800 [micro]M PCE to ETH within 14 days.
Sahin and Tamer (2000) isolated a number of species of bacteria and fungi from enrichment cultures containing the fungicide Thiram.
Of those samples taken 2 years after flushing, only C-31 and C-37 yielded enrichment cultures of sulfate-reducing bacteria.
After 6 consecutive transfers on Postgate's Medium B, all positive sulfate reducing enrichment cultures were examined for their ability to degrade TCE in the absence of sulfate.
melophagi DNA was amplified directly from blood of patient 2, and from the respective BAPGM enrichment cultures and 14-day subculture colonies from both patients.
The kits provide rapid detection of pathogen DNA isolated from enrichment cultures of potentially contaminated food samples in addition to specific Internal Controls.