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. 2015 Jun 12;20(5):338–346. doi: 10.1007/s12199-015-0472-4

Fig. 3.

Fig. 3

Colilert reagent for detection of total coliforms and E. coli [21, 23]. The mixture of Colilert reagent and water sample turns yellow if any coliform bacteria are present and yellow plus fluorescent if specifically E. coli is present (color figure online)