i dont think it was the rays fault you got MRSA and i expect they are more concerned about the MRSA than the actual ray sting although its most peoples nature to put blame somewhere.
i would be asking myself if i were on all the meds because of the ray sting or because of the MRSA as they are clearly two different problems.
you will then get the argument that if you werent stung you wouldnt have been in the hospital in the first place. which opens up a whole new can of worms. ...
i.e. do you blame your kids if you catch a cold because you were in the playground picking them up ?
good luck and i hope you get well (and the ray makes it too)