MacConkey's Agar showing lactose positive pink colony above a lactose negative colorless colony.
MacConkey's Agar showing lactose positive pink colony above a lactose negative colorless colony.MacConkey's Agar showing lactose positive pink colony above a lactose negative colorless colony.MacConkey's Agar showing lactose positive pink colony above a lactose negative colorless colony.
MacConkey's Agar showing lactose positive pink colony above a lactose negative colorless colony.
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MacConkey's Agar Bacterial Growth Medium


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MacConkey's Agar growing Gram-negative bacteria; pink lactose fermenting bacterial colony above colorless non-lactose fermenting bacterial colony.

Example of Colony Morphology of Bacteria Grown onMacConkey's
Examples of various Gram-negative bacterial colony morphologies grown on MacConkey's Agar (MAC)
Bacterial Growth on MacConkey's Agar. Lac - Salmonella Left, Lac + E.coli Right
Bacterial Growth on MacConkey's Agar. Lac - Salmonella Left, Lac + E.coli Right
Bacterial growth on MacConkey's Agar. Lac - Salmonella left, 
Lac + E.coli right. 
E. coli Bacteria Written and Growing on MacConkey's Agar.
E. coli bacteria written and growing on MacConkey's Agar. 
E. coli Lac + Bacterial Growth on MacConkey's Agar
E. coli lac + bacterial growth on MacConkey's Agar. 
E. coli on MacKonkey's Agar That Has Dried Up
E. coli lac + bacterial growth on MacConkey's Agar. On this plate, the MAC Agar and bacteria have dried out.
MacConkey's Agar showing lactose positive pink colony above a lactose negative colorless colony.
MacConkey's Agar showing lactose positive pink colony above a lactose negative colorless colony.
MacConkey's Agar Growing a Pink Smiley Face of E. coli
MacConkey's Agar growing a pink smiley face of E. coli (Gram-, lactose fermenting).
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Lactose Fermenting Gram-negative Bacteria Growing on MacConkey's Agar
Page last updated 8/2015
Sterile Plate of MacConkey's Agar MAC
Sterile Plates of Specialized Bacterial Growth Media: MacConkey's, Mannitol Salt and Bloog Agar (clockwise from top left)
Sterile plate of MacConkey's Agar photo on left. Sterile plates of MacConkey's, Mannitol Salt and Blood Agar (clockwise from top left) photo on right. 
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MacConkey's Agar growing Gram-negative bacteria; pink lactose fermenting bacterial colony above colorless non-lactose fermenting bacterial colony.MacConkey's Agar growing Gram-negative bacteria; pink lactose fermenting bacterial colony above colorless non-lactose fermenting bacterial colony.
MacConkey's Agar growing Gram-negative bacteria; pink lactose fermenting bacterial colony above colorless non-lactose fermenting bacterial colony.MacConkey's Agar growing Gram-negative bacteria; pink lactose fermenting bacterial colony above colorless non-lactose fermenting bacterial colony.MacConkey's Agar growing Gram-negative bacteria; pink lactose fermenting bacterial colony above colorless non-lactose fermenting bacterial colony.
MacConkey's Agar growing Gram-negative bacteria; pink lactose fermenting bacterial colony above colorless non-lactose fermenting bacterial colony.MacConkey's Agar growing Gram-negative bacteria; pink lactose fermenting bacterial colony above colorless non-lactose fermenting bacterial colony.MacConkey's Agar growing Gram-negative bacteria; pink lactose fermenting bacterial colony above colorless non-lactose fermenting bacterial colony.MacConkey's Agar growing Gram-negative bacteria; pink lactose fermenting bacterial colony above colorless non-lactose fermenting bacterial colony.
MacConkey's Agar growing Gram-negative bacteria; pink lactose fermenting bacterial colony above colorless non-lactose fermenting bacterial colony.MacConkey's Agar growing Gram-negative bacteria; pink lactose fermenting bacterial colony above colorless non-lactose fermenting bacterial colony.MacConkey's Agar growing Gram-negative bacteria; pink lactose fermenting bacterial colony above colorless non-lactose fermenting bacterial colony.
MacConkey's Agar growing Gram-negative bacteria; pink lactose fermenting bacterial colony above colorless non-lactose fermenting bacterial colony.MacConkey's Agar growing Gram-negative bacteria; pink lactose fermenting bacterial colony above colorless non-lactose fermenting bacterial colony.
MacConkey's Agar growing Gram-negative bacteria; pink lactose fermenting bacterial colony above colorless non-lactose fermenting bacterial colony.
MacConkey's Agar growing Gram-negative bacteria; pink lactose fermenting bacterial colony above colorless non-lactose fermenting bacterial colony.MacConkey's Agar growing Gram-negative bacteria; pink lactose fermenting bacterial colony above colorless non-lactose fermenting bacterial colony.
VIDEO: MacConkey's Agar (MAC) 
Bacterial Growth Medium
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Learn more about this  specialized medium in the SPO article:

MacConkey's Agar (MAC)

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