I had the same question. The strains of bacteria in question are nearly universal and only specific serotypes cause disease; it's unclear that the E. coli you t

I had the same question. The strains of bacteria in question are nearly universal and only specific serotypes cause disease; it's unclear that the E. coli you track around on the bottom of your shoes is any more dangerous that the E. coli you'll encounter by touching a tree or a doorknob.