Microbiology: Citrate Agar

The video tutorial explains how some bacteria can use citrate as a carbon source. It describes the conversion of citrate into various compounds and the role of the citrate agar test in determining a bacterium's ability to utilize citrate. The test uses bromothymol blue as a pH indicator, which turns blue in alkaline conditions, indicating a positive result. The tutorial also covers how to interpret the test results, with blue indicating citrate utilization and green indicating no growth.

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