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- Active immunity : The state in which a host maintains an enhanced immunity|immune response]] to a particular disease, triggered either by having had the disease or by receiving antigens for it.
- Albuterol : A short-acting adrenergic beta-agonist, usually inhaled but also administered by the oral route
- Anaphylaxis : An acute allergic reaction caused by exposure to an antigen to which the patient is hypersensitive.
- Autoimmunity : The failure of an organism to recognize its own constituent parts (down to the sub-molecular levels) as "self", which results in an immune response against its own cells and tissues.
- Bacterial cell structure : Morphological and genetic features of unicellular prokaryotic organisms characterized by the lack of a membrane-bound nucleus and membrane-bound organelles.
- Bacteriophage experimental evolution : Method of testing evolutionary theory under carefully designed, reproducible experiments using bacteriophages.
- Blood cross-matching : Test for incompatibility between donor and recipient blood, carried out prior to transfusion to avoid potentially lethal haemolytic reactions.
- Coombs' test : Haemagglutination test in which coombs' reagent is added to detect incomplete antibodies coating erythrocytes.
- Ebola : A virus that causes severe hemhorragic fever and often death, that is easily spread.
- Enzyme-linked immunosorbent assay : Immunoassay utilizing an antibody labelled with an enzyme marker such as horseradish peroxidase.
- Fluorescent antibody technique : Either of two techniques (direct or indirect) used to test for antigen with a fluorescent antibody.
- HIV test : Tests used to detect the presence of the human immunodeficiency virus in serum, saliva, or urine, to detect HIV antibodies, antigens, or RNA.
- Halobacterium NRC-1 : A microorganism from the Archaea kingdom perfectly suited for life in highly saline environments giving biologists an ideal specimen for genetic studies.
- Hemagglutination test : Sensitive tests to measure certain antigens, antibodies, or viruses, using their ability to agglutinate certain erythrocytes.
- Homeopathy : System of alternative medicine involving administration of highly diluted substances with the intention to stimulate the body's natural healing processes, not considered proven by mainstream science.
- Hypersensitivity : In medicine, an altered reactivity to an antigen, which can result in pathologic reactions upon subsequent exposure to that particular antigen.
- Immediate hypersensitivity : Humoral reaction, mediated by the circulating B lymphocytes, which causes any of three responses: anaphylactic, cytotoxic, and immune system hypersensitivity.
- Immunoassay : Technique that makes use of the binding between an antigen and its homologous antibody in order to identify and quantify the specific antigen or antibody in a sample.
- Immunoglobulin : Proteins produced by lymphocytes, which are primarily antibodies to attack material the body considers hostile, although some may act as cytokines, signaling to other cells
- Immunologic test : Any test that uses immunologic techniques.
- Immunology : The study of all aspects of the immune system in all animals.
- Immunosorbent technique : Sensitive immunoassay that uses an enzyme linked to an antibody or antigen as a marker for the detection of a specific protein, especially an antigen or antibody.
- Infectious disease : In broad terms, diseases caused by living organisms; also a subspecialty of internal medicine concerned with the treatment of such diseases
- Intelligent design movement : American political movement advocating a form of creationism and "doubts about Darwin".
- Latex fixation test : Agglutination technique used to detect antibodies, such as those produced in response to the rubella virus or the rheumatoid factor.
- List of biology topics : Add brief definition or description
- Macrophage : A type of leukocyte (i.e., white blood cells) that is associated with chronic inflammatory response. It digests foreign cells using the mechanism of phagocytosis, and both circulates in the blood, but later attaches to tissue as a part of local immune response.
- Materials MASINT : A discipline involving the measurement of signatures from the collection, processing, and analysis of gas, liquid, or solid samples; it complements technical intelligence: a technical intelligence analyst would work with a captured example of the weapon, or at least pieces of it, to come to that understanding of the propellant, while an analyst of this technique would infer the propellant through analysis of the exhaust
- Microorganism : A 'germ', an organism that is too small to be seen individually with the naked eye.
- Pathology : The medical specialty that is expert in the use of laboratory methods to support clinicians in diagnosis, treatment, and prognosis
- Transfusion reaction : Allergic reaction to some of the cells or proteins in another person's transfused blood.
- Vaccine : "suspensions of killed or attenuated microorganisms (bacteria, viruses, fungi, protozoa, or rickettsiae), antigenic proteins derived from them, or synthetic constructs, administered for the prevention, amelioration, or treatment of infectious and other diseases."(National Library of Medicine)