Lactose fermentation is seen in ?: (A) Blood agar, (B) Chocolate agar, (C) MacConkey agar, (D) LJ medium
Answer is C. Ans. is 'c' i.e., MacConkey agar Culture on differential media that contain special dyes and carbohydrates distinguishes lactose-fermenting (colored) from non-lactose-fermenting (non-pigmented) colonies and may allow rapid presumptive identification of enteric bacteria. Such media, used to see lactose fermentation, are :? Eosine-methylene blue (EMB) MacConkey's agar Deoxycholate agar