I've had food poisoning 3 times now. Thankfully none of them went beyond "that night", though generally my body fought it and won by purging any and ALL foreign content from my body. Relentlessly.
I treat infected wounds in various ways depending on severity of infection. Anything from a simple application of Bepanthen every so often, through soaking in warm salty water, all the way to a constant onslaught of every antibacterial cream/oil I have applied in frequent copious amounts, often resulting in seriously dry skin and pain but infection no more.