Oh my god !!! Get yourself up to a&e immediately and get vaccinated for veil's desease, lockjaw and black death. Rotavate the whole garden and spray with DDT, agent orange or something stronger if you can get it. Next burn all shoes, clothes etc that have been worn in the garden. Barb wire off the entire area and leave for at least seven years.
Only joking mate, it sounds like your rat problem has already been solved and a fox passing through your garden wont do you any harm, if it leaves you a little present on the lawn, simply pick i