Hemagglutination Reactions Involving Plasmas and Erythrocytes of Individual Chickens and Ducks

The writer (Becker, 1952) has recently reported on the varied responses among both chicks and ducklings to blood-induced infection with Plasmodium lophurae. The present paper is concerned with hemagglutination reactions involving the plasmas of individual chickens and duck erythrocytes, on the one hand, and the plasmas of individual ducks and chicken erythrocytes, on the other. The agglutinations observed were the result of exposing the erythrocytes to diluted plasmas containing natural or innate agglutinins; i.e., agglutinins not formed as the result of active immunization through exposure to the antigens of the erythrocytes