[Quantitative and virus specific serum IgM detection in newborns (author's transl)].

Serum IgM concentration was determined in umbilical cord blood samples from 1000 newborns. 34 cases presenting elevated IgM values (greater than or equal to 30 mg%) were tested for virus specific IgM antibodies. We could demonstrate such virus specific IgM antibodies against Cytomegalovirus (4), against Rubella, Influenza A and Influenza B (2 each) and against Coxsackie virus (1). The quantitation of IgM in blood samples of child bearing women showed no elevated values compared to those of non-pregnant women of similar age groups.