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Positive IgM in Congenital CMV Infection
Efraim Bilavsky1,2, Salmas Watad1, Itzhak Levy1,2
11 Schneider Children's Medical Center of Israel, Petah Tiqva, Israel.
Clinical Pediatrics
|December 24, 2016
Summary
Neonatal serum detection of cytomegalovirus (CMV) immunoglobulin M (IgM) is not sensitive for diagnosing congenital CMV (cCMV). However, a positive IgM result in infants is linked to more severe symptoms.
Area of Science:
- Virology
- Neonatal Immunology
- Infectious Diseases
Background:
- Congenital cytomegalovirus (cCMV) is a leading cause of non-genetic sensorineural hearing loss.
- Neonatal screening for cCMV often relies on detecting specific antibodies, but their diagnostic utility varies.
- Cytomegalovirus (CMV) immunoglobulin M (IgM) is a marker of recent infection, but its role in cCMV diagnosis and severity assessment is debated.
Purpose of the Study:
- To evaluate the sensitivity of neonatal serum CMV IgM detection for diagnosing cCMV.
- To assess the association between positive CMV IgM and the severity of symptomatic cCMV disease.
- To determine the predictive value of CMV IgM for symptomatic outcomes in infants with cCMV.
Main Methods:
- Retrospective analysis of infants diagnosed with cCMV.
- Comparison of infant outcomes based on CMV IgM test results (positive vs. negative).
- Statistical analysis including calculation of sensitivity, odds ratios, and confidence intervals.
Main Results:
- The sensitivity of neonatal serum CMV IgM for diagnosing cCMV was found to be 40.7%.
- Infants testing positive for CMV IgM showed a statistically significant higher rate of symptomatic disease (67.7%, P < .001).
- Positive CMV IgM was present in 48.8% of symptomatic and 22.1% of asymptomatic infants.
Conclusions:
- Neonatal serum CMV IgM testing demonstrates low sensitivity for diagnosing cCMV.
- While a positive CMV IgM result is associated with more symptomatic cCMV disease, it is not a precise laboratory marker for disease severity.
- Further research into more sensitive diagnostic markers for cCMV is warranted.
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