NET
44 the priest is to come and examine it, and if the infection has spread in the house, it is a malignant disease in the house. It is unclean.
Darby
44 then the priest shall come, and when he looketh, and behold, the plague hath spread in the house, it is a corroding leprosy in the house: it is unclean.
KJV
44 Then the priest shall come and look, and, behold, [if] the plague be spread in the house, it [is] a fretting leprosy in the house: it [is] unclean.