Wash the wound, use a bit of hydrogen peroxide. Apologize to kitty for having scared her/him. When cats bite, they release different types of saliva depending on the reason why they bite. This was an "I am scared, don't touch me now" type of bite; so the saliva proteins will not be very strong. Black cats are different from others; they are often very highly intelligent and have their own minds. They are also usually very protective of their people.