They are generally less hardy, and less fit to survive outside of the special conditions in hospitals. Where a mutational defect causes resistance, the survival advantage is almost always caused by a loss of information. In no case is there any evidence of an information-adding, 'uphill' change. Supergerms give no evidence to sustain the claim that living things evolved from simple to complex, by adding information progressively over millions of years. Bacteria actually provide evidence against evolution.
Bacterial populations multiply at incredibly high rates.
In only a matter of a few years, bacteria can go through a massive number of generations, equivalent to millions of years in human terms. Therefore, since we see mutation and natural selection in bacterial populations happening all the time, we should see tremendous amounts of real evolution happening. However, the bacteria we have with us today are essentially the same as those described by Robert Koch a century ago. In fact, there are bacteria found fossilised in rock layers, claimed by evolutionists to be millions of years old, which as far as one can tell are the same as bacteria living today. The famous French biologist Pi rre Grass , who held the chair of evolution at the Sorbonne for many years, admitted that mutations in bacteria simply showed shifts back and forth around a mean, but no net effect.