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MOELLERS DECARBOXYLASE MEDIAHardy Diagnostics Moellers Decarboxylase Media is recommended for the differentiation of gram-negative enteric bacilli based on the production of arginine dihydrolase, lysine decarboxylase or ornithine decarboxylase.A positive decarboxylase result is indicated by the development of a purple to pale yellow-purple color.A negative decarboxylase result is indicated by the development of a bright yellow color for glucose-fermenting microorganisms. Non-glucose-fermenters will result in little or no color change as compared to an uninoculated tube...