#immunology

• Abbas textbook of immunology — In a medical and academic context, the term refers to Dr. Abul K. Abbas, an internationally renowned pathologist and immunologist, co-author of the landmark textbook 'Robbins & Cotran Pathologic Basis of Disease' and 'Cellular and Molecular Immunology'. His name is synonymous with core teaching models of cellular immunology, immune tolerance, and T-cell activation.
• Adjuvant — A substance or element added to a primary product (medicine, vaccine, pesticide) to enhance, prolong, or direct its therapeutic or technical efficacy; also, in literary theory, a character who assists the protagonist in achieving their goal. As an adjective, it describes any factor that supports or amplifies a basic action.
• Agglutinin — A specific antibody or protein substance present in blood plasma or immune serum, capable of inducing the process of agglutination (clumping together) of foreign cells, bacteria, erythrocytes, or antigen-bearing particles. It plays a fundamental role in blood typing and in the immune defense mechanisms of the organism.
• Agglutinogen — An antigen substance, protein or carbohydrate in nature, located on the outer surface of the erythrocyte membrane, bacteria, or other biological cells. Its structural interaction with a specific agglutinin in the plasma triggers the agglutination reaction, serving as the core biochemical element that defines blood types within the ABO and Rh systems.
• AIDS — International medical acronym for 'Acquired Immunodeficiency Syndrome', a chronic and potentially life-threatening condition caused by the human immunodeficiency virus (HIV). The virus structurally destroys the cells of the immune system, depriving the body of its capacity to fight opportunistic infections and malignancies, with the AIDS stage representing the advanced clinical phase of the infection.
• Allergen — A substance of organic or inorganic nature (antigen) capable of inducing a hypersensitivity reaction or an exaggerated immune response (allergy) in previously sensitized organisms. Among the most common allergens are pollen, dust mites, molds, certain foods (peanuts, milk, shellfish), some medications, or insect venom.
• Allergenic — Possessing the properties or structural capacity to act as an allergen; causing or tending to trigger an allergic reaction in genetically predisposed or sensitized organisms. The term qualifies foods, cosmetics, textiles, or environmental settings based on their potential to induce hypersensitivity.
• Allergic — 1. Pertaining to, related to, or caused by an allergy; characterized by an immune system hypersensitivity reaction upon contact with an allergen. 2. (Noun) A person who suffers from an allergy, presenting an exaggerated immunological sensitivity to certain environmental substances or foods. 3. (Colloquial) Manifesting a strong aversion, rejection, or deep intolerance toward a situation, a person, or a concept.
• Allergy — A state of pathological hypersensitivity of the immune system, acquired through repeated contact with certain foreign substances (allergens) that are normally harmless to most people. From a structural and molecular standpoint, the reaction involves the massive release of histamine and other inflammatory mediators, manifesting clinically through respiratory, cutaneous, digestive, or vascular symptoms.
• Allergography — A rare medical term designating the graphical recording, mapping, or systematic description of allergic reactions and their intensity recorded during a treatment or immunological testing; the structural representation of the evolution of a patient's hypersensitivity profile over time.
• Allergological — Pertaining to allergology, relating to allergology, or concerning the study, diagnosis, and treatment of immune hypersensitivity conditions (allergies). The term qualifies medical examinations, clinics, congresses, studies, or therapeutic protocols specific to this specialty.
• Allergology — A specialized branch of clinical medicine that deals with the study, diagnosis, treatment, and prevention of allergies and all pathological manifestations caused by immune system hypersensitivity reactions. Structurally, allergology is closely linked to immunology, dermatology, and pulmonology, utilizing in vivo and in vitro testing protocols to calibrate desensitization therapies.
• Alexin — A historical term used in early immunology, introduced by Hans Buchner and popularized by Jules Bordet, to designate the complement system; a thermolabile protein substance present in normal blood serum capable of destroying bacteria and other foreign cells in cooperation with specific antibodies (sensitizers). In modern biochemistry, its action is studied as an integral part of the innate non-specific immune response of cell lysis.
• Allogenic — Produced, determined, or controlled by external factors or forces foreign to the respective system, community, or organism. In ecology, it refers to ecological successions induced by external abiotic changes (e.g., drought, floods); in geology, it is synonymous with allogenetic; in medicine (immunology), it describes a transplant or tissue harvested from an individual of the same species but genetically distinct.
• Allotype — A genetic variation or structural antigenic determinant within a protein or immunoglobulin (antibody) that differentiates individuals within the same species. This form of molecular polymorphism reflects the presence of different alleles at the corresponding gene locus, utilized as an essential biological marker in population genetics, forensics, and immunogenetics.
• Allotypic — Pertaining to or relating to an allotype, or presenting a structural variation specific to a subset of individuals within the same species. In immunogenetics, it describes antigenic determinants or polymorphic sequence modifications of serum proteins; in psychology, it can refer to behaviors or traits externally adapted or determined by complementary factors.
• Anaphylactic — Pertaining to anaphylaxis; triggering, accompanying, or characterizing an acute, systemic, and potentially lethal allergic reaction, structurally initiated by the massive and abrupt release of chemical mediators (such as histamine) from mast cells and basophils following an antigen-antibody immunological conflict. In a clinical sense, it defines severe manifestations characterized by a collapse in blood pressure and asphyxiation.
• Anaphylaxis — A state of acute, systemic, and violent allergic hypersensitivity of the body, structurally occurring upon the introduction of a foreign substance (antigen) to which the body was previously sensitized. This severe immunological phenomenon involves massive mast cell degranulation and can rapidly progress to circulatory shock, obstructive laryngeal edema, and cardio-respiratory arrest, requiring immediate emergency medical care.
• Toxoid — A bacterial toxin modified through thermal and chemical treatment, usually with formaldehyde, which completely loses its pathogenic toxic power while retaining its structural antigenic properties intact. This biological substance is widely used in vaccine preparation to stimulate the body to produce specific antibodies and ensure long-lasting active immunity against severe diseases such as tetanus or diphtheria.
• Anatoxitherapy — A therapeutic or prophylactic method consisting of the controlled administration of toxoids into the organism with the purpose of inducing the production of specific antitoxins. This structural immunological treatment aims to achieve active immunity, being essential in preventing and early combating infectious diseases triggered by exotoxin-producing bacteria.