I understand the basic principle behind the development of drug resistant strains as a result of using antibiotics. A person gets infection, takes the antibiotics, all the drug susceptible bacteria die and we are left with the drug resistant ones. The drug resistant ones are then free to do reproduce creating a new strain. Basically evolution on steroids.
My question is - do the antibiotics in any way cause the mutation of the drug susceptible bacteria into drug resistant ones? Or is it all just survival of the fittest?