13/08/2026
Two selective media. Two different ways to read the plate. 🧫
MacConkey Agar helps differentiate lactose-fermenting and non-fermenting Gram-negative bacteria, while XLD Agar provides additional clues through characteristic colony reactions, including hydrogen sulfide production.
Neither plate tells the whole story on its own. The right choice depends on what you are looking for and what the sample needs to reveal.
Different media. Different clues. Better interpretation.