That's some bad stuff. I got hit with it about 6 or 7 years ago,and damn near died. The surgeon the ER called in at 3 AM to operate on me told me that if I had waited another 30 minutes to get to the hospital I would have died and there would have been nothing they could have done to save me.

I got lucky because the ER doc on duty had operated on a 15 year old girl for the same thing the previous year,and he recognized what it was right away and hit the panic button for the other docs and the ER crew. The 15 year old girl had what she thought was a insect bite on her lower leg that didn't want to heal and kept getting bigger over a couple of days. By the time she went to see a doctor her leg was so far gone they had to amputate it to save her life.