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  • Title: Immune complexes in purpura hemorrhagica of the horse contain IgA and M antigen of Streptococcus equi.
    Author: Galan JE, Timoney JF.
    Journal: J Immunol; 1985 Nov; 135(5):3134-7. PubMed ID: 4045192.
    Abstract:
    Purpura hemorrhagica is an acute disease of the horse characterized by edema of the head and limbs, leucocytoclastic vasculitis, petechial hemorrhages in mucosae, musculature and viscera, and sometimes glomerulonephritis. It is usually associated with strangles, an upper respiratory tract disease of the horse caused by Streptococcus equi. We have detected and characterized immune complexes in the sera of horses with poststrangles purpura hemorrhagica by using PEG precipitation and Western blot analysis. The immune complexes contained IgA and S. equi-specific antigens similar to those found in acid extracts. We propose that purpura hemorrhagica is an immune complex-mediated disease.
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