Isolation and differentiation of Methicillin Resistant Staphylococcus aureus (MRSA) including low level MRSA.

• Methicillin Resistant Staphylococcus aureus (MRSA) → rose to mauve
• Methicillin Susceptible Staphylococcus aureus (MSSA) → inhibited
• Other bacteria → blue, colourless or inhibited