Intrauterine infection and cord immunoglobulin M. 3. Serological analysis of infants with elevated cord serum immunoglobulin M.
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The presence of antibodies to rubella, cytomegalovirus and Toxoplasma gondii was determined at birth and at 6 months of age in a group of 147 infants with cord serum IgM levels >/= 19.0 mg/dl and in 92 control infants. Maternal syphilis serology was determined in both groups as well. No significant differences in the prevalence or levels of antibodies to these pathogens were found between the two groups which might have led to the diagnosis of unsuspected intrauterine infection. Persistence of antibodies to 6 months of age was similar in the two groups, indicating that this is not a useful index of intrauterine infection.ANALYSIS OF THE RESULTS YIELDED THE FOLLOWING DATA ON THE PREVALENCE OF ANTIBODIES TO THE PATHOGENS STUDIED: rubella virus, 90 and 75% seropositivity at birth and 6 months respectively; cytomegalovirus, 65 and 35%; and Toxoplasma gondii, 33% seropositivity at birth.
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