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Color
Pink
Selective Agents
Bile salt - 8.5 g/L
Select For
Gram-negative
Salmonella
Shigella
Metabolite
Lactose
Sodium Thiosulfate (bacteria would consume and produce H2S)
pH Indicator
Neutral red
Fe++ compound (detects H2S)
Color of Significance
Fermentation byproducts (acidic) = Hot pink
Protein (aa) Metabolism (basic) = Colorless
H2S = black precipitate = MIGHT be salmonella