MacConkey agar is a selective and differential medium for detection of coliforms and other enteric organisms. Appearance: Beige with pale pink tint, homogenous, free-flowing powder. pH (5%): 7.1 0.2 Microbiology: The medium was prepared according to formulation and inoculated with the organisms listed below. Cultures were incubated at 352C in an aerobic atmosphere and examined for growth at 18-24 hours. Enterococcus faecalis ATCC 29212: Partial to complete inhibition Escherichia coli ATCC 25922: Growth Proteus mirabilis ATCC 12453: Growth, partial inhibition of swarming Salmonella typhimurium ATCC 14028: Growth
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