There is a new superbug known as "CRKP", or Klebsiella pneumoniae. CRKP is an enterobacterium which is a relative of E. coli. It is known to be resistant to most antibiotics other than colistin. However, colistin is a drug so powerful that there are established cases of this drug damaging kidneys after its use. This issue can be particularly troublesome for people with kidney disease such as PKD . This superbug is spreading rapidly and is now known to be in most of our states. CPKP is known to be fatal in at least 40% of the cases. The CDC is very concerned about the limited treatment options.