Urther characterization of the s. aureus isolated from george's wound reveals that the strain is mrsa. why is george's doctor concerned that mrsa has been identified as the causative agent of george's infection?

The MRSA or the Methicillin-resistant Staphylococcus aureus strain is among the dangerous strains of Staphylococcus aureus. This strain can cause infections which may prove to be severe. The antibiotic-resistance of this strain makes it harder to treat it. Although most of the infections caused by this strain of bacteria are not much dangerous, but a few can be life-threatening. It is also known as the 'superbug'. Hence, the doctor was concerned to find MRSA strains in George's wound.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.