Or if anyone unwittingly touches anything ceremonially unclean – whether the carcass of an unclean animal, wild or domestic, or of any unclean creature that moves along the ground – and they are unaware that they have become unclean, but then they come to realize their guilt (NIV)
Or if anyone touches an unclean thing, whether the carcass of an unclean wild beast or of an unclean domestic animal or of unclean creeping things that multiply prolifically, even if he is unaware of it, and he has become unclean, he is guilty. (AMP)
Or if a soul touch any unclean thing, whether it be a carcase of an unclean beast, or a carcase of unclean cattle, or the carcase of unclean creeping things, and if it be hidden from him; he also shall be unclean, and guilty. (KJV)