Sometimes a snake tooth will be lost, when it bites. This is a normal part of life. If one is left embedded in your skin, treat it as a splinter, though a tooth usually comes out easier than most splinters. Reptiles are physiologically incapable of having rabies, a definite advantage over dogs and cats. Most turtle bites are pinches and will not draw blood.
Larger tortoises can have a good bite, though.
Especially small children's soft hands should be kept in a save distance. The most unpleasant part of being bitten by a turtle is often, to get the animal off. Once a snapping turtle struck at me, and I did not see his head move because it was SO FAST that I must have missed it during a blink. Lucky for me, the hand was at the extreme edge of his range and his nose just hit the center of the back of my hand. The alligator snapper get up to 300 lbs and can remove a significant portion of a hand or foot.