A sample of bacteria is plated on Hektoen agar.Growth is observed and the medium changes to an orange color.What does the given information indicate?

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Quizplus · Accepted Answer

Hektoen agar is a selective and differential medium primarily used to isolate and differentiate Gram-negative enteric bacteria, particularly Salmonella and Shigella species. The medium contains lactose and sucrose, and the orange color change indicates the fermentation of lactose, suggesting that the organism is a Gram-negative lactose fermenter.

A Sample of Bacteria Is Plated on Hektoen Agar