Sorry cant answer your question, but i found a source for bactroban nasal spray(which has been hard and compounding pharmacy would charge me a firtune to make something like this), so i will talk this over with my doc. I think in combo with oral abx and abx spray it might have a better affect, i hope so.
I asked this of a guy running a health food store in Sedona. I use a collodial silver/DMSO spray from my ME doc here in the UK, and wanted to start making my own. I have found it very helpful with dental infections. He said with the silver, fifty fifty. But in truth, I have no idea. Will ask the pharmacist who makes it up what her concentrations are.