It is common sense that with vulnerable people in residence, plus potential sources of infection being introduced on a daily, if not hourly, basis, any hospital has to have a good system of infection control from top to bottom.
This applies not only to sterilisation of instruments and equipment in surgery, but to more mundane matters such as cleanliness of toilets, washbasins, floors, disposal of both non-hazardous and hazardous waste (such as sharps). The ancillary services of the hospital are just as important- kitchens, food preparation and service, routine dressing and medication applications- the list is almost endless.
In each case, all staff involved should be properly trained in infection control and reduction and the chain of command should ensure that procedures are actually followed on a day-to-day basis. If that is done and it can be shown that it was done, then it is less likely that a claim would follow if infection does nonetheless arise. All medical situations carry a potential risk of infection and if that risk arises, it does not automatically mean there has been negligence somewhere.
On the other hand, if evidence shows that procedures were inadequate, or were not properly followed, then there may well be potential for a medical negligence claim.