Page 1558 - Veterinary Immunology, 10th Edition

the immunoglobulin Fc region. Classically found in the blood of
VetBooks.ir patients with rheumatoid arthritis.

S

Sarcoma A tumor arising from cells of mesodermal origin.

Secondary binding tests Serological tests that detect the
consequences of antigen-antibody binding, such as agglutination
and precipitation.

Secondary immune response An enhanced immune response that
results from second or subsequent exposure to an antigen.

Secondary immunodeficiencies Immunodeficiency diseases
resulting from a known, nongenetic cause.

Secondary infections Infections by organisms that can invade only
a host whose defenses are first weakened or destroyed by other
infectious agents or toxins.

Secondary lymphoid organ A lymphoid organ whose function is to
trap and respond to foreign antigens.

Secondary structure The way in which a peptide chain is made up
of structural components such as α-helices and β-pleated sheets.

Secretory component A protein produced by mucosal epithelial
cells; it functions as an IgA receptor and, on binding to IgA,

protects IgA against proteases in the intestine.

Selectin A family of cell surface adhesion proteins that bind cells to

glycoproteins on vascular endothelium.

Self-cure The elimination of intestinal worms by a localized type I

hypersensitivity reaction in the intestinal tract.

Sensitivity A term that describes the ability of a diagnostic test to

correctly identify negative results.

Sensitization The triggering of an immune response by exposure to

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