Mysterious e.coli superbug mcr-1 said to have hospitalized person

And of course the name of the alleged person has not been released:

Hopefully this is a measure to prevent panic and protect the individual who is afflicted with the illness. Because otherwise, with scientists calling mcr-1 "extremely contagious", where is the rationale in keeping the name of the victim a secret and keeping the victim's friends and acquaintances in the dark, since said friends and acquaintances may have recently been in direct contact with the alleged victim? Where is the rationale in letting said individuals go about their daily lives without knowing that they are potentially infected carriers of the disease? Where is the logic in keeping friends and acquaintances from knowing that maybe they should get tested?