#allergy

• Mite — An extremely small, often microscopic invertebrate organism belonging to the order Acari within the class Arachnida. It is characterized by a compact body in which the head, thorax, and abdomen are fused and not clearly differentiated. The taxon encompasses a wide variety of saprophytic species (such as dust mites) or hematophagous parasites (such as ticks and the scabies mite), many of which act as dangerous vectors transmitting severe infectious diseases to humans and animals.
• Aeropalynology — A branch of palynology that studies spores, pollen grains, and other microparticles of plant or fungal origin suspended in Earth's atmosphere and transported by air currents. This discipline has major importance in establishing pollen calendars, monitoring air quality, and diagnosing respiratory allergies or seasonal rhinitis.
• 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.
• 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.
• Ambrosia — In Greek mythology, the food of the Olympian gods, believed to confer immortality and eternal youth, possessing an absolute fineness of fragrance and taste. In a modern botanical sense, the term designates an invasive herbaceous plant, native to North America and scientifically known as Ambrosia artemisiifolia, whose pollen is highly allergenic and causes severe respiratory conditions during its flowering season.
• Antiallergic — A medication, chemical substance, or biological treatment designed to prevent, mitigate, or suppress the clinical manifestations of an allergic reaction; an antihistamine. It works by blocking histamine receptors or modulating IgE-mediated immune responses.
• Antihistamine — Blocking the action of histamine in the organism by binding to specific cellular receptors (especially H1 or H2); a medication widely used in the treatment of allergic reactions, rhinitis, or gastric ulcers. In a pharmacological sense, it reduces inflammatory manifestations, pruritus, gastric hypersecretion, and edemas caused by the massive release of histamine.
• Aspergillosis — A generic name given to a group of human or animal infections or allergic reactions caused by molds of the Aspergillus genus; a condition transmitted through the inhalation of spores present in the air, manifesting under various clinical forms, from hypersensitivity reactions (such as allergic bronchopulmonary aspergillosis) to severe, potentially fatal invasive forms in immunocompromised patients.
• Atopic — Pertaining to atopy, referring to atopy, or characterized by a hereditary predisposition to develop immediate allergic hypersensitivity reactions (such as dermatitis, asthma, or rhinitis) upon contact with common environmental allergens. Clinically, it describes skin that is extremely dry, sensitive, and prone to severe pruritus.
• Atopy — A hereditary or constitutional predisposition of an individual to develop immediate hypersensitivity (allergic) reactions, mediated by immunoglobulin E (IgE) antibodies, upon contact with common environmental allergens such as pollen, dust, or certain foods. This genetic condition manifests clinically through related disorders including atopic dermatitis, bronchial asthma, allergic rhinitis, or urticaria.