**5.6** *E. coli* **on m-ENDO agar**

Coliforms appear as red colonies with a metallic green sheen. In *E. coli*, this reaction is so intense that the fuchsin crystallizes out giving the colonies a metallic green sheen. The selective agents contained in the medium, sodium deoxycholate and sodium lauryl sulfate help to inhibit non-coliforms metabolize lactose with the production of aldehyde and acid [31] shown in **Figure 8**.

Escherichia coli*: An Overview of Main Characteristics DOI: http://dx.doi.org/10.5772/intechopen.105508*

## **Figure 7.**

E. coli *on EMB agar showing green metallic sheen colonies [30].*

**Figure 8.** E. coli *on ENDO agar with green metallic sheen colonies [31].*
