Despite cleanup efforts, some Jackson County, Miss., homes still have mold festering behind walls and under leaky windows two years after Hurricane Katrina. "It’s growing. It’s in the vents and the walls. It makes you itch all over,’’ said Perry Fountain. Though she scrubbed her floors and walls with bleach repeatedly, her garage walls became coated from the inside out with black mold after Katrina flooded her Moss Point home on Aug. 29, 2005.