If the cases of gastro do become too much then the health department should be looking into the centre. At DD1's last centre in Melbourne, gastro just seemed never ending. DD got it so many times. I am all for kids building an immunity, so I am normally not fussed about illnesses, but at one stage DH had major bowel surgery, a bout of gastro could have killed him. At that time I really needed to know about outbreaks and it was the one time the whole centre was so sick that normal protocol was not done. No signs were put up, DD1 went as per normal and came home very ill. DHS finally stepped in and wanted it recorded who had gastro. Samples were also taken from all surfaces and even from poo of children presenting with it. At our current centre, the number of illness signs are way less than the old centre and DD1 rarely gets ill now.

If it is continual, rather than occasional, then I would say something. It either means a lapse in procedure in the centre or a family is not being as responsible as they should. Saying that though it is often hard to pick illness in kids, they can be fine in the morning and ill when they wake up from their nap.