I should not get a disagree for asking a question.
1. It has been resistant to a number of antibiotics. You haven't tried Methecillin (sp) yet.
2. That happens to be the precise route that MRSA invaded my aunt.
3. Unfortunately she passed away. Her immune system was extremely weak.
That's why I suggested it. They may need to screen for MRSA.
I would hope that it's possible to sample, culture and grow and try various antibiotics on the cultured stuff to see which one works.
It could be just a Staph infection:
Staph Infection Symptoms, Signs, Causes, Types and Treatment Information on eMedicineHealth.com
Note the bottom of the page where it mentions cathether.
Staph is very prevelent in most hospitals. The route of infection was obviously the cathether. If sterile procedures wer not carried out properly, you risk infection.
Meanwhile, holisticly, limit sugar intake, no coffee, no chocolate and drink cranberry juice.