The presence of precipitating antibodies against beta-hemolytic streptococci in sera from different age groups--fetal, newborn and child.
D000906:Antibodies; D002648:Child; D005333:Fetus; D006801:Humans; D007223:Infant; D007231:Infant, Newborn / Q000276:immunology; D013291:Streptococcus
D000906:Antibodies
INFANT, NEWBORN/immunology