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IMViC
The IMViC tests are a group of individual tests used in microbiology lab testing to identify an organism in the coliform group. A coliform is a gram negative, aerobic or facultative anaerobic rod which produces gas from lactose within 48 hours. The presence of some coliforms indicate fecal contamination.
Except for the lowercase "i", which is added for ease of pronunciation, each of the letters in "IMViC" stands for one of these tests. "I" is for indole test; "M" is for methyl red test; "V" is for Voges-Proskauer test, and "C" is for citrate test. The lower case "i" is merely for "in", as the Citrate test requires coliform samples to be placed "in Citrate".
These tests are useful in distinguishing members of Enterobacteriaceae.
== Indole test ==
In this test, the organism under consideration is grown in peptone water broth. It contains tryptophan, which under the action of enzyme tryptophanase is converted to an Indole molecule, pyruvate and ammonium. The indole is then extracted from the broth by means of xylene. To test the broth for indole production, Kovac's reagent is added after incubation. A positive result is indicated by a pink/red layer forming on top of the liquid.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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