For the following reasons, this observation has nothing to do with macro-evolution. Some bacteria already had the resistance. When antibiotics are used in such instances, the non-resistant bacteria die, leaving the resistant ones. But no new information has been introduced into the system. No one has ever observed such a phenomenon occurring.
Some bacteria directly transfer their resistance to others.
Thus information that enables bacteria to become resistant to a substance can be transferred to a non-resistant organism. Information in this instance is just transferred around. But, when examined closely, all such mutations appear to be losses of information. Penicillin resistance can occur in bacteria because of a mutational breakdown of a mechanism that controls the production of an anti-penicillin enzyme. Though resistant, the bacteria are weakened through enzyme over-production.