Every physician after his first professional attendance upon a person bitten by a pet or other animal shall within twelve hours report to the county health department the name, age, sex, color and precise location of the person so bitten and, when no physician attends, the parent or guardian of every child so bitten shall, within twelve hours after first having knowledge that the child was so bitten, make a like report to the county health department. When no physician attends an adult so bitten such adult or the person caring for him shall make a like report to the county health department.