Question

Which kind of media contains a dye or other indicator that responds to metabolic reactions during growth to identify a specific organism?

Answer 1

Eosin methylene blue agar (EMB) is a selective and differential medium used to isolate fecal coliforms. Eosin Y and methylene blue are pH indicator dyes which combine to form a dark purple precipitate at low pH; they also serve to inhibit the growth of most Gram positive organisms.

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