Page 1528 - Veterinary Immunology, 10th Edition
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Glossary
A
Actinobacteria A major phylum of Gram-positive bacteria with a
high G+C content. They include important pathogens such as
the Mycobacteria, Corynebacteria, and Rhodococcus.
Activated macrophage A macrophage in a state of polarized
metabolic and functional activity.
Active immunity Immunity produced as a result of administration
of an antigen, thus triggering an immune response.
Acute inflammation Rapidly developing inflammation of recent
onset. It is characterized by tissue infiltration by neutrophils.
Acute-phase proteins Proteins, synthesized by the liver and other
tissues, whose level in serum rises rapidly in response to acute
inflammation and tissue damage.
Adjuvant Any substance that, when given with an antigen,
enhances the immune response to that antigen.
Adaptive immunity Immunity that recognizes foreign invaders
and adapts to them. As a result it improves with experience.
Adoptive immunity Immunity that results from the transfer of cells
from an immunized animal to an unimmunized recipient.
Affinity The strength of binding between two molecules such as an
antigen and antibody. Usually expressed as an association
constant (Ka).
Affinity maturation The progressive increase in antibody affinity
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