MacConkey Agar Plates Protocols

  • Author: Mary E. Allen 1
    Affiliations: 1: Biology Department, Hartwick College, Oneonta, New York, 13820
  • Citation: Mary E. Allen. 2005. Macconkey agar plates protocols.
  • Publication Date : September 2005
  • Category: Protocol
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Figure 1

FIG. 1 Streak plate of Escherichia coli and Serratia marcescens on MacConkey agar. Both microorganisms grow on this selective media because they are gram-negative non-fastidious rods. Growth of E. coli, which ferments lactose, appears red/pink on the agar. Growth of S. marcescsens, which does not ferment lactose, appears colorless and translucent.

Source: September 2005
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