How do E.coli produce green sheen on EMB agar? Explain what happens to the indicators present.?

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How do E.coli produce green sheen on EMB agar? Explain what happens to the indicators present.?

2007-03-07 02:39:03 · 1 answers · asked by Anonymous in Science & Mathematics ➔ Biology

1 answers

A green sheen can be seen which is due to the precipitation of methylene blue in the medium from the very high amount of acid produced from fermentation. Those which form this type of colony are methyl red-positive lactose-fermenters such as most strains of E. coli and some strains of Citrobacter.

2007-03-07 03:24:28 · answer #1 · answered by Tiffany 3 · 0⤊ 0⤋