Page 1532 - Veterinary Immunology, 10th Edition

airway diameter, leading to difficulty in breathing (dyspnea).
VetBooks.ir Atopy A genetic predisposition to become sensitized and produce

IgE antibodies in response to allergens commonly occurring in
the environment.

Attenuation The reduction of virulence of an infectious agent.

Autoantibodies Antibodies directed against epitopes on normal

body tissues.

Autoantigen A normal body component that acts as an antigen.

Autograft A tissue or organ graft made between two sites within
the same animal.

Autoimmune disease Disease caused by an immune attack against
an individual's own tissues.

Autoimmunity An immune response against normal body
components.

Autophagy A process of cellular self-digestion by which cells can
ingest and destroy intracellular microbes or damaged

organelles.

B

B lymphocytes (B cells) Lymphocytes that have undergone a
period of processing in the bursa or its mammalian equivalent.
They are responsible for antibody production.

Bacille Calmette-Guérin (BCG) vaccine An attenuated strain of
Mycobacterium bovis. This may be used as a specific vaccine or as
a nonspecific immune stimulator.

Bacterin A preparation of killed bacteria used for immunization.

Basophil A polymorphonuclear cell that contains granules with a
high avidity for basic dyes such as hematoxylin. It participates in
type I hypersensitivity reactions.

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