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The removal of antibodies from serum by the addition of red cells that possess the corresponding surface antigen

Absorption

1

An antigen that is not genetically determined and is sometimes transient

Acquired antigen

2

Immunity that is generated by the actual production of antibody by the host in the presence of foreign antigen

Active immunity

3

Normal serum constituents that increase in the presence of infection, injury or trauma to the tissues

Acute phase proteins

4

A substance that can increase the specific antibody production to, or the degree of sensitization againts antigen by increasing the size or length of survival in the circulation. A substance (usually injected with an antigen) that improves the immune response, either humoral or cellular, to the antigen

Adjuvant

5

The attachment of one substance to the surfaceof another, in particular, the attachment of antibody to specific receptors on a cell surface

Adsorption

6

Collection into clamps of the cells or particles distributed in a fluid.

Agglutination

7

An antibody that is capable of causing agglutination with surface antigens

Agglutinin

8

An antigen agglutinated or clumped by an agglutinin

Agglutinogen

9

A system for activating complement beginning at C3 and do not involve a serologic reaction

Alternative complement pathway

10

A substance in the blood and the lymph serving as one of the active component on the process of cytolysis, the other components being the complement and the cells with antibodies. Anti-sheep red blood cell antibody that causes hemolysis of sheep red cells in the presence of complement.

Amboceptor

11

A globulin formed in response to exposure to an antigen. Also known as immunoglobulin

Antibody (Ab)

12

Any substance that oppose or counteract the action of a complement

Anticomplementary substance

13

Any substance which, when introduced into the body stimulates the formation of antibody

Antigen (Ag)

14

Union of antibody with its homologous antigen

Antigen-antibody complex

15

An autoantibody directed against a component of the nucleus, commonly found in systemic lupus erythematosus (SLE)

Antinuclear antibody (ANA)

16

A serum containing antibody

Antisera

17

An antibody produced against streptolysin O, a hemolysin produced by Group A streptococci.

Antistreptolysin O (ASO)

18

An antibody produced against "self" antigen

Autoantibody

19

A molecule that behaves as a "self" antigen

Autoantigen

20

A lymphocyte from the bursa of Fabricius or an immunoglobulin-forming cell

B-cell

21

A substance contained in beef erythrocytes, which is capable of absorbing the heterophil antibodies produced as a result of infectious mononucleosis (IM) and serum sickness.

Beef erythrocyte (BE) antigen

22

A protein, not normally present in human blood, appears in a wide variety of inflammatory conditions. It is characterized by their ability to react with the C-polysaccharide somatic substance of the pneumococci.

C-reactive protein

23

The majpr system of complement activation that involves all nine components of complement and is initiated by a serologic reaction

Classic component pathway

24

An agglutinin or hemagglutinin that is active at 4oC but not at 37oC

Cold agglutinin

25

A humoral mechanism of nonspecific immune response consisting of at least 14 components that proceed in a cascading sequence of activation resulting in cell lysis.

Complement

26

The fixation or binding of complement in a reaction with antigen and antibody

Complement fixation

27

Monitors day to day accurate performance of the lab tests/analyses

Control

28

A substance composed of extract from fresh beef hearts combined with lecithin and cholesterol

Cardiolipin antigen

29

A hemagglutination test that defines the characteristics of heterophil antibody by guinea pig and beef cell antigens

Davidsohn differential test