| A | B |
|---|
| active immunity | long-term protection against future infections resulting from production of antibodies |
| agglutination | clumping together of blood cells or latex beads caused by antibodies adhering to their antigens |
| allergen | an antigen that causes an allergic reaction |
| antibodies | immunoglobulins produced specifially to destroy foreign invaders |
| antigens | substances that are perceived as foreign to the body and elicit an antibody response |
| autoimmune diseases | destructive tissue diseases caused by antibody/self-antigen reactions |
| iFOB | immunoassayed fecal occult blood test |
| inflammation | overall reaction of body to tissue injury or invasion by infectious agent |
| interferons | proteins secreted by infected cells to prevent further replication and spread of an infection into neighboring cells |
| in vitro | within a laboratory apparatus |
| in vivo | within a host or living organism |
| normal flora | nonpathogenic microorganisms that normally inhabit the skin and mucous membranes |
| passive immunity | short-term acquired immunity created by antibodies received through placenta or artifically by injection |
| serology | branch of laboratory medicine that performs antibody/antigen testing with serum |
| titer | quantitative test that measures the amount of antibody that reacts with a specific antigen |
| vaccination | process of injecting harmless or killed microorganisms into the body to induce immunity against a potential pathogen |
| wheal | raised induration |
