Not to be a downer cause I LOVE a good bacterial implication story... but...
I believe (and someone correct me if I'm wrong please) but the 13 that became ill just had GI symptoms of Diarrhea etc. No IBD was so far developed or diagnosed.
The case of Crohn's and UC are from a separate event (and only suspected) from back in 2007.
In any case, I feel awful saying this, but maybe it will take an event like this (or something in the future during the games) to get researchers to look more at the link between bacteria and virus etc.... so infectious IBD model.
EDIT: It also appears that only the US team was effected so far. Canada's team said they were perfectly fine after. So who knows.
Post Edited (Canada Mark) : 8/11/2015 4:35:33 PM (GMT-6)