What the New Superbug Means for the US

Experts say a Pennsylvania woman's recent case of an antibiotic-resistant infection shows the urgency for new antibiotics. In the case, the E. coli bacteria causing the 49-year-old woman's urinary tract infection were found in lab testing to be resistant to an antibiotic called colistin. Doctors consider colistin a "last resort" drug — it can have serious side effects, such as kidney damage, so it is used only when other antibiotics do not work.