Hardly off topic when talking about the dearth of new antibiotics. As for constant evolution - just put known samples on ice? (I wonder if it would be possible

Hardly off topic when talking about the dearth of new antibiotics. As for constant evolution - just put known samples on ice? (I wonder if it would be possible to use DNA printing to load them with a tested genome?) Regardless though, they are unlikely to evolve towards uselessness, and they can't attack human cells, so, does it matter if they drifted some?