My Dad caught C.Diff from one of our filthy NHS hospitals. He never recovered fully
He only went in for a biopsy. When we went to visit him on the night he had packed his bags and was sat at the end of the bed waiting for us and said he couldn't stay overnight and he wanted to come home.
He eventually said he had seen the dirtiest toilets ever! Now, my Dad was not a fussy man, he had been in the navy and had 'roughed it' several times. So, for him to say this, it must have been pretty bad.
Worst part is we persuaded him to stay for the biopsy as we thought it was in his best interest. How bad is that? I have never forgiven myself.