Clean the wound thoroughly. Use clean water (boiled) or even urine (which is sterile). Do not close the wound unless you need to to stop the bleeding. If you are not closing it under sterile conditions, it is easier to keep clean and prevent infection if it is open. it should be covered with the most sterile or cleanest bandaging material available to prevent more contamination from getting in.

The ancient Egyptians used honey to cover wounds and it is effective. Bacteria does not grow in honey, some honey was found in a jar in an ancient tomb (more than 2000 years old) and it was still edible.