After the determination of ABO blood type on 87 cases of the mother and 91 cases of the newborn infant, an attempt was made to measure, in terms of avidity of the erythrocytes, an agglutination test adding the standard antiA and antiB sera(The Nat...
After the determination of ABO blood type on 87 cases of the mother and 91 cases of the newborn infant, an attempt was made to measure, in terms of avidity of the erythrocytes, an agglutination test adding the standard antiA and antiB sera(The National Institute of Health, U.S.A.) to the erythrocytes of A and B type respectively, and for O type, in which agglutination does not occur with antiA and antiB sera, the sera of the cattle and fowls possessing antiO substance, were added.
The results of this experiments revealed that in 76 cases of the mother and 80 cases of the newborn infant who were examined with antiA and antiB sera, the avidity test of the erythrocytes showed a marked acceleration in the mother’s blood in comparison with the newborn infant’s, the mean value being 2.12 seconds in former and 3.49 seconds in the latter.
It is interesting to note that more or less similar results were observed in 11 cases of the mother and infant with O type for whom the avidity was determined by means of heterospecific sera.