>but we already have resistant strains out there. But those resistant strains will be outcompeted by non-resistant strains without the presence of anti-biotics

>but we already have resistant strains out there. But those resistant strains will be outcompeted by non-resistant strains without the presence of anti-biotics. There is a fitness cost to most resistance mechanisms [1] [1] http://www.ncbi.nlm.nih.gov/pubmed/20208551 http://www.ncbi.nlm.nih.gov/pubmed/20208551