Antigen Consequence Delayed-type hypersensitivity Proteins: Local skin swelling: Insect venom Erythema Mycobacterial proteins Induration Cellular infiltrate Inducers of Type (tuberculin,lepromin) Dermatitis IV Hypersensitivity Contact hypersenshivity Haptens: Pentadecacatechol Local epidermal DNFB reaction: Metal ions: Erythema Nickel Cellular infiltrate Chromate Contact dermatitis Gluten-sensitive enteropathy Villous atrophy Gliadin in small bowel Malabsorption 1997 Current Biology Ltd./Garland Publishing,Inc.Inducers of Type IV Hypersensitivity