Not at all rare
Cdc estimates that a bit over 250, 000 cases of shiga toxin producing e.
Coli occur in the usa annually. Large and small outbreaks occur frequently associated with a variety of vehicles including undercooked ground beef, salad ingredients such as lettuce and spinach, exposure at a petting zoo and even waterborne either potable or not. The bug is also called enterohemorrhagic e. Coli (ehec).