A few years back I was hospitalised because of a bite on my arm from one of our cats (long story) and was given heavy doses of multiple antibiotics.
If that hadn't been treated so promptly I might have required surgery or might even have lost my arm (a nurse told me about someone who lost a leg to a cat bite!).
Edit: When I went to the hospital I had no idea how serious it was and turned up to the "Minor Injury Unit" - they had me in A&E and X-rayed within about 10 minutes!
Edit: Of course, having been in the hospital for 3 days rather than the expected hour or so I was fretting about car parking charges - turns out they are free at the point of parking....