S1 [LAB]: GLOSSARY Flashcards
A laboratory technique that involves the removal of antibodies by the use of a specific antigen (i.e., red blood cell surface antigen)
Absorption
The proximity or closeness of a value to the true value
Accuracy
Incurred due to external factors and is not inherited
Acquired
Normal serum constituents that increase or decrease in the presence of an infection, injury, or trauma to tissues; associated with inflammatory reactions
Acute-phase proteins
A substance added to vaccines to potentiate or enhance the immune response of the recipient
Adjuvant
Examples of adjuvant
Alum
Freund’s adjuvant
The key enzyme in the glycolytic cycle of Plasmodium parasite
Aldolase
A process of attachment of one substance to the surface of another; attachment of an antibody to a specific antigen receptor on a cell surface
Adsorption
Binding strength between an antigenic determinant (epitope) and its complementary site (paratope) in the Fab region of the antibody
Affinity
Absence of all immunoglobulins in the serum
Agammaglobulinemia
Aggregation or clumping of cellular or particulate antigens to their corresponding antisera containing antibodies
Agglutination
An antibody capable of causing agglutination with multivalent surface antigens
Agglutinin
Agglutinin usually belongs to which antibody class?
IgM
A particulate or cellular antigen involved in agglutination or aggregaration
Agglutinogen
An enzyme that liberates the inorganic phosphates from phosphate esters
Alkaline phosphatase
T/F: Alkaline phosphatase is used as an indicator label in immunoassays
True
An alternative form of a gene at a particular locus or specific position on a chromosome
Allele
An antigen that triggers an allergic or hypersensitivity reaction
Allergen
An adjuvant commonly added to human vaccines
Alum
An anti-sheep red blood cell antibody that causes hemolysis of sheep red blood cells in the presence of complement
Amboceptor
A rapid rise in the immunoglobulin concentration following subsequent exposure to an antigen
Anamnestic response
Also known as a secondary immune response or booster response
Anamnestic response
An immunoglobulin formed in response to an antigen
Antibody
Highest dilution factor of a sample that still results in a visible reaction
Antibody titer
Any substance that, when introduced into the body, stimulates antibody production
Antigen
Union of an antibody with its homologous antigen
Antigen-antibody complex
Accessory cells present in tissues the process antigens and display fragments on the cell surface in association with a Class II MHC molecules; examples include dendritic cells and macrophages
Antigen-presenting cells (APC)
Number of antigenic determinants on an antigen
Antigen valency
A specific region of an antigen that is recognized by the B- or T-cell receptors
Antigenic determinant
Ability of a substance to react with immune products
Antigenicity
An autoimmune antibody directed against a nuclear component; usually seen in patients with systemic lupus erythematosus
Antinuclear antibody (ANA)
An antibody produced against streptolysin O
Antistreptolysin O (ASO)
ASO is produced by which specific group of bacteria?
Group A Streptococcus
Suppressor and cytotoxic T-cells capable of recognizing and killing B-cells infected by viruses such as Epstein-Barr virus
Atypical lymphocytes
Atypical lymphocytes are also known as ___
Reactive lymphocytes
Former name of the hepatitis B surface antigen
Australia antigen
The condition in which an immune response is initiated by “self” antigens
Autoimmunity
The sum total binding strength between an antigen and an antibody
Avidity
A lymphocyte that originated from the bone marrow; cells of the adaptive immune response that possess surface antibodies that are specific to an epitope
B-cell
A protein not normally present in human blood but is present in a wide variety of inflammatory reactions
C-reactive protein
Characterized by their ability to react with the C-polysaccharide component of pneumococci
C-reactive protein
A substance composed of fresh beef heart extract combined with lecithin and cholesterol
Cardiolipin
Immunity that is dependent on T-cells and phagocytic cells
Cell-mediated immunity
The movement of cells such as neutrophils toward a stimulus
Chemotaxis
Cell surface markers that are employed for immunophenotyping cells particularly lymphocytes
Cluster of designation
Cluster of designation is also known as ___
Cluster of differentiation
Agglutinins that belong to the IgM class and are active at 4C but not at 37C
Cold agglutinins
A humoral mechanism of non-specific immune responses of at least 14 components that proceed in a cascading sequence of activation, resulting in cell lysis
Complement
Former name of complement
Alexin
The process of binding of complement in a reaction with an antigen and antibody
Complement fixation
A substance that is similar to the patient sample that is used to monitor the precision of analytical tests
Control
A protein molecule secreted by leukocytes that regulate immune response
Cytokine
A hemagglutination test that defines the characteristics of the heterophile antibody through guinea pig and beef cell antigens
Davidsohn differential test
The most common procedure for the separation of lymphocytes
Density gradient centrifugation
A fluid containing antibodies deliberately removed from red blood cells
Eluate
A ligand assay that employs an enzyme label, and the binding reagent is an antibody
Enzyme immunoassay
A specific region of antigen that is recognized by B-cell or T-cell
Epitope
A point of dilution in a serologic reaction in which there is maximal binding of the antigen and antibody as seen in precipitation reactions
Equivalence point
Agglutinating antibodies that are produced in response to microorganisms that induce fever
Febrile agglutinins
A type of precipitation that occurs over a narrow range of antigen concentration
Flocculation
Flocculation involves the aggregation of colloidal particles described as a ___ or ___
Fleecy mass
Clump
A heterophile antibody that is found in serum samples of most normal individuals
Forssman antibody
A substance that absorbs Forssman and serum sickness antibodies
Guinea pig kidney antigen
Flagellar antigens
H antigen
A small non-immunogenic molecule that can function as an epitope if bound to a carrier molecule
Hapten
Agglutination of red blood cells
Hemagglutination
A substance that causes agglutination of erythrocytes
Hemagglutinin
Rupturing or lysis of red blood cells and the subsequent release of their contents into the surrounding fluid
Hemolysis
Ruptured erythrocytes
Hemolyzed
Antibodies that are produced n an individual in response to an antigen that will also react with another unrelated antigen
Heterophile antibodies
A retrovirus that causes disease affecting the immune system; etiologic agent of acquired immunodeficiency disease
Human immunodeficiency virus (HIV)
Adaptive immunity that involves the production of antibodies
Humoral immunity
A reaction that demonstrated a specific antibody response to an antigen
Immune response
A condition that is resistant to an infection
Immunity
A laboratory method employed for the qualitative or quantitative detection of antibodies
Immunodiffusion
An antigen capable of stimulating an immune response
Immunogen
Outside the body; observable in a test tube
In vitro
Within a living organism
In vivo
The process in which complement activity in a serum is nullified by heating
Inactivation
The total reaction of a body against an injury or invasion
Inflammation
Capsular antigen
K antigen
A structure that forms when a multivalent antigen binds to an antibody in optimal or maximal proportions
Lattice
A molecules that binds or forms a complex with a biologic molecule such as receptors, proteins, or antibodies
Ligand
An antibody that causes the dissolution of cells
Lysin
A collection of structural genes that code for proteins that cans serve as antigen-presenting molecules in cell-mediated immunity as well as proteins needed in tissue transplantation
Major histocompatibility complex
Refers to the presence of multiple copies of the same epitope within the same antigen
Multivalent
An antigen-antibody reaction in which the reactive effect of a particular antigen is nullified by a specific antibody
Neutralization
A qualitative test to determine defects in the NADPH oxidase
Nitroblue tetrazolium test
Employed in the detection of chronic granulomatous disease
Nitroblue tetrazolium test
Non-specific antibodies detected in patients with syphilis
Non-treponemal antibodies
Examples of non-treponemal antibodies
Reagin
Wasserman antibodies
Somatic antigen
O antigen
A molecule that attaches itself to microorganisms or antigens to enhance phagocytosis
Opsonin
The process wherein the antibody coats an antigen to allow a more effective phagocytosis
Opsonization
Serum samples obtained from patients during the acute and convalescent phase
Paired sera
Used to determine if there is a significant antibody titer increase
Paired sera
Related to all or every or a large group
Panspecific
An antibody that has a capability of recognizing different isoforms of protein
Panspecific
A process wherein phagocytes, such as neutrophils and macrophages, engulf or “eat” microbes or particulate matter
Phagocytosis
The fluid matrix of unclotted blood
Plasma
A weak or negative antigen-antibody reaction that occurs when there is an antigen excess in the presence of a relatively low amount of antibody
Postzone reaction
An antigen-antibody reaction between a soluble antigen and an antibody that produces an insoluble precipitate
Precipitation
An antibody that interacts with a soluble antigen
Precipitin
The antibody class usually involved with precipitin
IgG
Tests that involve a specific recognition and interaction of an antigen to its corresponding antibody
Primary tests
T/F: Primary tests are most sensitive than secondary tests
Secondary tests
A weak or negative antigen-antibody reaction that occurs when serum containing antibodies is in excess in the presence of a relatively low amount of antigen
Prozone reaction
An immunologic test that employs radioisotopes as labels for antigens or antibodies, complements, or other reactants
Radioimmunoassay
An antibody-like substance produced in response to certain tissue invasion and destruction such as in syphilis
Reagin
An IgM antibody produced in patients which binds to the Fc portion of IgG
Rheumatoid factor
A process in which cells, such as RBCs, are coated with incomplete or blocking antibodies such as igG
Sensitization
T/F: Sensitization results to agglutination
False
A progressively higher dissolution of a substance arranged in a definite sequence or series
Serial dilution
The detection of a specific antibody in the serum of an individual whose antibody was previously undetectable
Seroconversion
A branch of biology that deals with the study of antigens and antibodies and their biologic relationships
Serology
The fluid matrix of clotted blood
Serum
A type of hypersensitivity reaction that involves the giving of non-human gamma globulins immunization
Serum sickness
A special affinity between an antigen and its corresponding antibody
Specificity
A property of B- and T-cell receptors to recognize only one epitope
Specificity
A thymus-derived lymphocyte involved in cell-mediated immunity
T cell
A biomarker found in elevated levels of body fluids in patients with neoplasms
Tumor markers
Employed for monitoring the progression of neoplasms
Tumor markers
An antibody that is active at 37C but not at 4C
Warm agglutinins
Antibody class that is a warm agglutinin
IgG
A serologic test employing cross-reacting Proteus somatic antigens employed for the diagnosis of rickettsial diseases
Weil-Felix test
A febrile agglutination serologic test used to detect febrile agglutinins
Widal agglutination test