- 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.
Microbiology. Aard_Wark . 2009.
indicator organism
Look at other dictionaries:
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 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
