Pathogen-derived antigen

Pathogen-derived antigens are molecules or molecular components produced by infectious agents—including viruses, bacteria, fungi, and parasites—that can trigger recognition by the host immune system due to their foreignness. These antigens are recognized by antibodies and T cells through interaction with antigen-presenting cells, leading to immune activation, pathogen clearance, or, in rare cases, immune-mediated tissue damage. Their identification and presentation are central to vaccine development, diagnostic testing, and immunotherapy. However, "pathogen-derived antigen" is a functional category rather than a specific molecular drug target. If structured data is required for specific individual antigens (e.g., HIV gp120, tuberculosis Ag85B, influenza hemagglutinin), it is necessary to use the precise molecule name rather than the generic category.

Other names

pathogenic antigensexogenous antigensmicrobial antigens

As vaccine antigens: induce immune memory and protective immunity via antibody and T cell responses