C. F. Keil and Franz Delitzsch on Leviticus 14:35-36

Lev 14:35-36

When the evil showed itself in a house, the owner was to send this message to the priest, “A leprous evil has appeared in my house,” and the priest, before entering to examine it, was to have the house cleared, lest everything in it should become unclean. Consequently, as what was in the house became unclean only when the priest had declared the house affected with leprosy, the reason for the defilement is not to be sought for in physical infection, but must have been of an ideal or symbolical kind.