http://www.cdc.gov/mmwr/preview/mmwrhtm ... mm6219a3_x
First of all, detecting nucleic acid from a bacteria is not the same as finding a live bacteria in the pool. So their conclusions are faulty.
Secondly they give poor advice for pools, using test strips and chlorine levels that are too low/don't consider FC or CYA.
Embarassing article by the US government.
Oh and yes I am a scientist.