Unformatted text preview: be a bubble in the Durham tube where the broth was displaced. Purple Broth is also a differential test medium that is made up of a basal recipe where a carbohydrate is added. This allows fermentation characteristics for a variety of carbohydrates. The base formulation contains peptone and the pH indicator bromcresol purple. If the pH is below 6.8 then the medium is yellow, and purple above 6.8. This medium is ideal for testing enteric bacteria because the final medium is more acidic than Phenol Red. A Durham tube is also inserted into this medium to test for gas production....
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This note was uploaded on 04/07/2008 for the course MICRO LAB ??? taught by Professor Mulacny during the Spring '08 term at Johnson County Community College.
- Spring '08