Aaron Carroll says rise in drug-resistant bacteria CRE should concern us all . He says bacterial strains -- like MSRA a few years ago -- evolve to resist antibiotics . Over time , these bacteria have become harder and harder to treat . Concern is over spread in hospitals now , but bug could get out into community , he says . Comment: Misuse of antibiotics gives bacteria chance to evolve -- a real public health danger .
Aaron Carroll says rise in drug-resistant bacteria CRE should concern us all . He says bacterial strains -- like MSRA a few years ago -- evolve to resist antibiotics . Concern is over spread in hospitals now , but bug could get out into community , he says . Comment: Misuse of antibiotics gives bacteria chance to evolve -- a real public health danger .