Sorry for the delay in replying. It depends where the MRSA is? Usually tests will specify a site where MRSA is active eg. a wound, nose, throat, groin, blood, urine etc. If you were in hospital you would be isolated but if you are at home you wouldn't/ couldn't be (although you would probably be educated on how to prevent spread). 40% of the population unknowingly carry MRSA in their nose so many cases are carried into hospitals as opposed to being caught in hospitals. Depending where your MRSA is, it can be difficult to spread so it may be that you are not considered a huge risk to others. MRSA is pretty harmless unless it gets into an open wound or caught by an immunocompromised person eg. someone on chemo. Even then, it usually causes delayed wound healing only and not usually the horrific stories you hear in the press. Your immune system is probably pretty compromised hence your vulnerability to it. It may be something you need to endure whilst you are on chemo. Keep taking the antibiotics. It may be worth asking your doctor to screen anyone living with you in case there is a constant cross infection going on. Remember, of the 40% carrying it, most are symptomless so others in your household may be carriers.
Good luck!