Theoretically, non-resistant bacteria should have a competitive advantage over resistant bacteria in an environment without antibiotics - they don't have to spe

Theoretically, non-resistant bacteria should have a competitive advantage over resistant bacteria in an environment without antibiotics - they don't have to spend energy producing useless resistance enzymes, and instead can grow better. That means, in theory, with no antibiotics, you should have very few resistant organisms. The problem is that's all "in theory". Right now, the level of evidence for community-acquired MRSA and the competitive advantages of susceptible versus resistant S. aureus has thrown that all into question.