MacConkey Agar w/o Crystal Violet (Powder)

Less selective than Macconkey Agar and will permit growth of Enterococci and Staphylococci. MacConkey Agar without Crystal Violet is a modified version of the first media developed for the isolation of Gram negative enteric bacteria. The deletion of crystal violet allows the growth of enterococci, staphylococci and Mycobacterium sp. Gram negative enteric bacteria which ferment lactose will produce red to pink colonies. Because this medium is less inhibitory medium it is recommended that specimens be plated on other more inhibitory Gram negative media such as Deoxycholate Agar.||Microbiology:|Microorganisms: |Enterococcus faecalis ATCC 29212: Pink colonies|Escherichia coli ATCC 25922: Pink colonies|Proteus mirabilis ATCC 12453: Colorless colonies|Salmonella typhimurium ATCC 14028: Colorless colonies|Staphylococcus aureus ATCC 25923: Pink colonies||Appearance:|Supplied as a light pinkish-beige, free-flowing homogeneous powder||Solubility:|Red-orange, trace to slightly hazy||pH:|7.4 ± 0.2||Important Note: This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.