What is the term for the ability of an antigen to provoke an immune response?

• A. Reactivity
• B. Immunogenicity
• C. Antigenicity
• D. Inflammatory response

Answer: (B)

The term for the ability of an antigen to provoke an immune response is immunogenicity. Immunogenicity refers specifically to the capacity of a substance, such as a pathogen or foreign molecule, to induce an immune reaction. This response typically involves the activation of lymphocytes and the production of antibodies, which are critical components of the adaptive immune system.

Immunogenicity is influenced by factors such as the nature of the antigen, its dose, and the route of administration. Different antigens can vary significantly in their ability to trigger an immune response based on their structure and how the immune system recognizes them.

Other terms, while related, do not capture this specific concept. For example, reactivity refers more broadly to how an antigen interacts with immune components, and antigenicity describes the ability of the antigen to be recognized by immune receptors but does not encompass the full spectrum of provoking a response. The inflammatory response, on the other hand, refers to the body's immediate response to injury or infection, which can occur independently of specific antigen recognition and is not solely indicative of an immune response.