Hypersensitivity Reactions
A patient presents with contact dermatitis (e.g., poison ivy reaction) following exposure to a specific substance. Which of hypersensitivity reaction is most likely responsible for this condition?
Type I (immediate) hypersensitivity
Type II (cytotoxic) hypersensitivity
Type III (immune complex-mediated) hypersensitivity
Type IV (delayed-type) hypersensitivity