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indicator organism

См. также в других словарях:

  • Indicator organism — Indicator organisms are used to measure potential fecal contamination of environmental samples. The presence of coliform bacteria, such as E. coli , in surface water is a common indicator of fecal contamination. Coliform bacteria in water samples …   Wikipedia

  • indicator organism — An organism whose presence indicates the condition of a substance or environment, for example, the potential presence of pathogens. Coliforms are used as indicators of fecal pollution …   Dictionary of microbiology

  • Indicator bacteria — Each gram of human feces contains approximately 12 billion (12*109) bacteria, among them may include pathogenic bacteria, such as Salmonella , associated with gastroenteritis. In addition, feces may contain pathogenic viruses, protozoa and… …   Wikipedia

  • indicator — noun Date: 1666 1. one that indicates: as a. an index hand (as on a dial) ; pointer b. (1) gauge 2b, dial 4a (2) an instrument for automatically making a diagram that indicates the pressure in and volume of the working fluid of an engine… …   New Collegiate Dictionary

  • indicator species — ▪ ecology       organism often a microorganism or a plant that serves as a measure of the environmental conditions that exist in a given locale. For example, greasewood indicates saline soil; mosses (moss) often indicate acid soil. Tubifex worms… …   Universalium

  • Model organism — Escherichia coli is a gram negative prokaryotic model organism …   Wikipedia

  • Bacteriological water analysis — is a method of analysing water to estimate the numbers of bacteria present and, if needed, to find out what sort of bacteria they are. It is microbiological analytical procedure which uses samples of water and from these samples determines the… …   Wikipedia

  • Reclaimed water — Reclaimed water, sometimes called recycled water, is former wastewater (sewage) that has been treated to remove solids and certain impurities, and then allowed to recharge the aquifer rather than being discharged to surface water. This recharging …   Wikipedia

  • Silver nitrate — Silver nitrate …   Wikipedia

  • Coliform Index — The Coliform Index is a rating of the purity of water based on a count of fecal bacteria. Coliform bacteria are microorganisms that primarily originate in the intestines of warm blooded animals. By testing for coliforms, especially the well known …   Wikipedia

  • Columbia Slough — Coordinates: 45°38′36″N 122°46′07″W / 45.64333°N 122.76861°W / 45.64333; 122.76861 …   Wikipedia


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