Quarantine the animal in a separate room far away from the other snakes. Unless you want them all to have ticks. Check the other snakes for ticks and if they any of them have it as well quarantine them as well.
Switch to newspaper and disinfect the cage as well as anything around or in it. Go buy some Provent-a-mite to kill off the rest of the ticks and prevent any future ones from appearing.

That is what I would do :-)
Good luck getting rid of them.