Disease and Rabies
If you are bitten by an unknown dog, the American Red Cross suggests that you do not try to stop, catch, or hold the animal. Contact animal control as soon as possible so they can try to capture the dog, and call 911 so you can begin rabies vaccinations right away.
If the animal that bit you seems to be partially paralyzed, acts aggressively, or behaves in a strange way, then it may be rabid.
For any bite, be sure to clean and disinfect the wound thoroughly, because all animal bites can transmit bacteria and cause infection.