g Consider a culture medium such as mannitol salt agar (MSA) on which only gram-positive organisms such as Staphylococcus sp. Colonies can grow due to an elevated NaCl level. A yellow halo surrounds some colonies on the medium, indicating they are able to ferment the mannitol sugar, decreasing the pH and changing the color of a pH indicator chemical. This type of medium would be referred to as:
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g Consider a culture medium such as mannitol salt agar (MSA) on which only gram-positive organisms s...
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