Multiple choice Which of the following media is selective for Gram-positive bacteria? Eosin Methylene Blue Baird–Parker agar MacConkey agar Xylose lysine desoxyscholate Buffered charcoal yeast extract agar Reveal answer Fill a bubble to check yourself B Correct answer Explanation Baird–Parker agar is a type of agar used for the selective isolation of Gram-positive Staphylococci species.