How does MacConkey agar indicate lactose fermentation?

How does MacConkey agar indicate lactose fermentation? MacConkey agar not only selects for Gram-negative organisms by inhibiting Gram-positive organisms and yeast but also differentiates the Gram-negative organisms by lactose fermentation. Lactose ferments will stain pink while the nonlactose ferments will be clear colonies. Does MacConkey agar test for lactose fermentation? MacConkey agar is a selective […]

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