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

Department of Medicine, Veterans Administration Medical Center, Houston, Texas 77211.

ABSTRACT

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.