I don't know if doctors would share that number or not. I have a staph infection as well and am taking Keflex. They said Vanco would not be necessary in this case but I may be on Keflex forever. My options are really limited. This is Knee #4 on my left knee and with each replacement the surgeon trims the bones so the prothesis will fit. At the moment my left leg is almost 3" shorter than the other. They tell me one option, if the infection gets worse, (and so far is doesn't seem to be getting better) would be to remove the joint, and replace my good hip with an artificial one, then run a straight rod to my ankle so my leg would never bend. The other choice is amputation. I was improving and was getting close to walking without the walker until I got a DVT near the prosthesis. Since then I have lost more and more feeling in my leg. But JK, you are right to be concerned, and the hospitals seem to go far to minimize the risk but people still get infections. Having to live with a Spacer is a life changing event IMO. I had one for 8 weeks with no load bearing and at 67 my muscles atrophy quickly and are slow to return. I feel as you do about the risk – if I knew then, what I know now, I would never, ever consider getting a joint replacement.