I got this earlier this season. There are several different types of staph infection you can get; mine was one of the more severe {it was oxcicilan-resistant staff, which meant the bug was immune to almost every antibiotic available}. At first it was just this nasty green/yellowish puss under the scab (on my knee from rollerhockey with the kids & didn't have my shinguards on). Then it evolved into one set of my lymphnodes increasing in size to that of a grape then bursting (both painful and disgusting).
I tried to ride it out (I hate going in to the doc unless I absolutely have to) until the whole lymphnode burst issue, then I went to the doctor & they put in a "pick-line" that went in like an I.V. line at the wrist & went up an artery and emptied straight into my heart. I had that in my arm for a week and had to have 1 1/2 hour injections of meds each morning and night for a week and a half.
The doctor & nurses were all freaked out when the lab results came back with the particular type of staph I had. They said that if mine had got to the lungs or heart it could have become life threatening, so they were all like "thank God we caught this early" and stuff. They said the lymph node system acts like a superhighway for the body and while it helps the good stuff travel faster to fight the bad stuff, if the germs & bugs get on it - it lets them travel around the body just as fast.
Biggest thing that suprised me was that they said statistically 1/3rd of the population walks around everyday with one or more of the various staph infection strings on our skin. It is not a threat there; just if we have a cut, in the right spot that allows it to get to our bloodstream. Apparently athletes are at higher risk, as we sweat profusely, contact one another, and where the same equipment over & over without washing it.
Best recommendation: DO NOT F*@( AROUND with this! It can mess you up quick! If you get a cut or deep scrape that gets infected, have it looked at or tested if you can. Whether it's losing a limb or losing life, it ain't worth the risk.