The selective medium XLD is seen in this illustration. What is the significance of the black coloni from CLIA Microbiology / Serology Review, presented by MediaLab

CLIA: Microbiology / Serology

Ungraded Practice Question

The selective medium XLD is seen in this illustration. What is the significance of the black colonies observable on this plate:

Please select the single best answer

	Lactose fermenter
	Nonlactose fermenter
	Dihydrogen Sulfide production
	Gram positives

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