http://www.rsc.org/chemistryworld/News/2008/April/

An interesting article on bacteria in the soil that thrive when fed antibiotics. Has both good and some bad potential consequences; we cannot kill them easily if the infect us; but they clean up things that might otherwise be considered pollutants.

I cannot tell if the organisms were really "bacteria" and not archaea or some prokaryotic eukaryota. I'd guess not because although many people would call all such things bacteria, scientists shouldn't.