BACGro MacConkey Agar w. Sorbitol / 5kg

BACGroTM MacConkey Agar w. Sorbitol (sMAC), when prepared as directed, is used as a partially selective and differential media for the isolation of E. coli O157:H7. It is not intended for use in diagnosis, treatment, or prevention of disease in humans.

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The formulation of BACGroTM sMAC is comprised of peptones to provide nutrient sources. D-sorbitol is a fermentable carbohydrate that aids in the differentiation of E. coli O157:H7 from other E. coli strains; non-fermenters (O157:H7) will remain colorless, while sorbitol-fermenters will turn pink. Bile salts and Crystal violet act as selective agents to inhibit the growth of Gram-positive organisms. Neutral red is a pH indicator.

Kit Specifications
Formulation (per Liter)

Gelatin Peptone 17.0 g

Casein Peptone 1.5 g

Peptic Digest of Animal Tissue 1.5 g

Sorbitol 10.0 g

Bile Salts 1.5 g

Sodium Chloride 5.0 g

Neutral Red 0.03 g

Crystal Violet 0.001 g

Agar 13.5 g

Total 50.0 g/L

2-30 °C
Coliform & E.Coli
Product Attachments
  • Instruction for Use - MacConkey Agar w. Sorbitol