MRSA ( Methicillin / meticillin resistant staphylococcus aureus) treatment is guided by sensitivity of the infecting strain. There's a whole range of possible antibiotics, depending on this, and the site of infection. ( Skin and soft tissue infections require a tetracycline alone or clindamycin alone, or a combination of Rifampicin and sodium fusidate. A glycopeptide such as vancomycin can be used, or linezolid if this is unsuitable. There are other antibiotics for chest or urinary tract infection, other infections and septicemia). All this depends on expert advice from a microbiologist.
Eradication of MRSA from the noses of patients and staff requires a nasal ointment such as Bactroban Nasal, but resistance can develop meaning it shouldn't be used for more than two courses. If there is resistance, there are alternatives such as chlorhexidine or neomycin cream.
All of this simply makes the point that it's not easy to manage MRSA infection, and certainly not cheap if treatment on the NHS is not possible.
Our thoughts are with you and yours Rosie.