There are only two routes to go forward to ensure public safety. The first is to examine how the bug grows in the lab and identify any possible differences from E. coli. There are a few but they could take time to detect and may not be valuable should an outbreak occur. The other is to use genetic methods to identify the bacterium based on its DNA.
Most of us have experienced at one time or another that rumble in the gastrointestinal jungle. But there is a darker side to these maladies manifesting at the microbial level. Though we may not feel these consequences in the short term, research has shown there may be more difficult times down the road.