Andrade Peptone Water, Modified 500G

Andrade Peptone Water, Modified is recommended for carbohydrate fermentation studies of particularly Enterobacteriaceae members in accordance with FDA BAM, 1998. This medium is prepared in accordance with FDA BAM, 1998 for carbohydrate fermentation studies of particularly Enterobacteriaceae members. Desired carbohydrate is added to the medium, which is inoculated with the test organism. If the test organism metabolizes the added carbohydrate, acids are produced, thereby lowering the pH of the medium. This causes a subsequent colour change of the indicator, from colourless to pink to red. If the added carbohydrate is not metabolized, the medium remains pale tan to straw coloured. Gas produced during fermentation is collected in the Durhams tube.