species-specific antigen

spe·cies-spe·cif·ic an·ti·gen

antigenic components in the tissues and fluids of members of a species of animal, by means of which various species may be immunologically distinguished; for example, serum albumin of horses is immunologically different from that of man, dogs, sheep, and so on.

species-specific antigen

an antigen that is restricted to a single species but occurs in all members of that species.

spe·cies-spe·cif·ic an·ti·gen

(spē'shēz spĕ-sif'ik an'ti-jen)
Antigenic components in tissues and fluids by means of which various species may be immunologically distinguished (e.g., serum albumin of horses is immunologically different from that of humans, dogs, or sheep).
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References in periodicals archive ?
Serologic specificity toward the different spotted fever group rickettsia species was determined by the relative immunoglobulin G (IgG) reactivity to species-specific antigens in the 110- to 145-kDa region.