Last week, I told a story about a med student who was told he wasn't sterile, and refused to re-scrub. This is a story that actually happened to someone in my class:
I was on my surgical clerkship with a guy named Dave, who was a bit of a character. He told me that soon after scrubbing and walking into the OR, he accidentally touched something, and was told that he was no longer sterile and he had to scrub again.
Dave left the OR, and he noticed that the sponge he had just used to scrub was still lying in the garbage. It wasn't IN the garbage, exactly. It was on the garbage. Hovering, like an angel. It seemed wasteful to him to open up a brand new sponge.
Long story short, Dave picked up the sponge from the garbage and used it to re-scrub.
As far as I know, nobody developed a horrible infection.