Question

Why does e coli gives green metallic sheen on emb agar?

Answer 1

EMB agar,most of the strain of E.COLI colonies have a characteristic green sheen

ENGREDENT-Eosin methylene blue (EMB) Agar(g/L)

LACTOSE-5g

AGAR-13.5g

Eosin Y-0.4g.

Answer 2

Answer:Gram negative bacteria that ferment the lactose produce acid which turns the colonies dark purple as the acid acts upon the dyes. ... In EMB agar, most of the strains of E.coli colonies have a characteristic green sheen.

Ingredient: Eosin methylene blue (EMB) Agar ...

Agar: 13.5 g

Lactose: 5 g

Eosin Y: 0.4 g

Explanation: