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 35±2°C 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