Episode 9: Indole

In this episode of Let’s Talk Micro, we kick off biochemicals for Gram-negative rods with the indole test. After wrapping up the Gram-positive cocci last week, we now explore what indole is, how the test works, and how it helps differentiate organisms like E. coli, Proteus, and Klebsiella. A classic biochemical that still matters in today’s microbiology lab.

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