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The human erythrocyte receptor which mediates mannose-resistant hemagglutination by enterotoxigenic Escherichia coli possessing colonization factor antigen II is not universally distributed among donors. Mannose-resistant hemagglutination-positive erythrocytes are more common among black donors than nonblack donors; tests with erythrocytes of known antigenic makeup confirm this correlation. Colonization factor antigen II receptor activity of mannose-resistant hemagglutination-positive erythrocytes is unstable when whole blood is stored at 4 degrees C. Also, screening of donors is best performed with enterotoxigenic E. coli possessing colonization factor antigen II composed of the coli surface antigen 1 (CS1) plus CS3, since these consistently produce stronger hemagglutination reactions than strains with colonization factor antigen II composed of either CS2 plus CS3 or CS3 only.

Mannose-resistant hemagglutination of human erythrocytes by enterotoxigenic Escherichia coli with colonization factor antigen II