[23] Patch-test results in this patient population revealed that 45% of patients had positive reactions to thimerosal (0.05% in petrolatum), 74% had positive reactions to metallic mercury (0.5% in ...

There are four main types of hypersensitivity reactions: Type I, which involves immediate allergic reactions; Type II, which includes cytotoxic reactions; Type III, characterized by immune complex ...

Types 1, 2, and 3 are immediate hypersensitivity reactions that occur soon after an allergen exposure. Type 4 is classified as delayed hypersensitivity reactions that occur 24 hours or longer ...

However, other metal ions as well as bone cement components can cause such hypersensitivity reactions. To complicate things, patients may also develop delayed-type hypersensitivity reactions to ...