Blech sorry I had a younger sister that got worms from allowing our dog to lick around her mouth. That put me off ever allowing that with my own kids. We have a strict house policy....

"if it can lick it's own bum (or mess about in it's own poop)....it does not get kissed by us or is allowed to kiss us"

We also have gel hand sanitizer in the house which we use due to having snakes in quarantine. For regular handling of the rest of the snakes, good handwashing with soap and water does the job (except for kids from outside the house or snake shows at school...then everyone sanitizes before AND after touching any of our snakes).