moldy, fungus-ridden wall corner shows high humidity damage. interior room corner shows gray mold growth, fungal contamination.

mold fungus humidity moldy wall corner room moisture damage growth sanitation health hazard mildew water fungal interior aged building contaminated microorganism microbiology closeup pattern surface grunge damp dirty black white gray disease allergy poison parasite rust rusteaten yeast shabby removal house basement home indoor exterior abstract texture urban decay contamination