A forgotten beast managed to get into my underground obsidian farm. It wasn't being used, so the damage was only a few toppled workshops, but due to the proximity to my main industrial area I sent in a squad to deal with it. The kill went rather smoothly with only 4 dwarves and some wardogs going in.
Then 3 of the dwarves and two of the dogs began to profusely vomit. They were rotting away ludicrously fast, spreading miasma all around them. Feet, hands, mouths, eyelids - all decaying after being sprayed with some foul, putrid slime from the dawn of time. Fearing a spreading infection (I suspect it of being airborne as the extract was described as "vapours") I sealed the obsidian farm and the workshops, trapping an unlucky thresher and an uninfected swordsdwarf in the process.
The swordsdwarf was evacuated, but the farmer is trapped in there as the infected soldiers immediatly ran for the locked doors and have been lying around ever since in pools of their own vomit and miasma. I imagine they are creeping out the workers who are just beyond the doors with their moaning and beating. Another symptome appears to be drowsiness.
My question is twofold, O wise overseers:
1) Is there a way to clean extracts off surfaces without any threat of spreading? I tried opening to floodgates briefly, but that seemed only to spread it around and I worry that manually cleaning it will infect the workers.
2) Do any of you have ideas for cleaning the extract off the rotting dwarves? I'm happy with the security as it looks now, but I feel it is unjust leaving them to die horribly like that. Besides, I want to recover the (I assume, unavoidable) corpses for my Crypt of Heroes. But not at the potential cost of the entire fortress succumbing to Sleep-rot.