Abstract
Congenital cytomegalovirus infection (cCMVi) is a leading cause of sensorineural hearing loss (SNHL) and developmental delay. Brainstem auditory evoked potentials (BAEPs) recording allows assessment of central auditory pathway maturation in neonates. We aimed to characterize the effect of cCMVi on the maturation of the brainstem auditory pathway in term neonates. We retrospectively reviewed medical records of neonates born with cCMVi in 2010–2018 and characterized their auditory pathway maturation using brainstem auditory-evoked potentials (BAEPs). We compared inter-peak latency differences (IPLDs) of the main BAEP components (I–V, I–III, and III–V) in terms of cCMVi patients and healthy controls and described their changes in cCMVi patients throughout the first year of life. Of 101 cCMVi patients, 57 (56.4%) were considered symptomatic, 6 (5.9%) were small for gestational age, 6 (5.9%) had microcephaly, 4 (4%) had thrombocytopenia, 5 (6.6%) had hepatitis, 2 (2.1%) had retinitis, 47 (49.5%) had typical abnormalities on head ultrasound, 9 (8.9%) developed SNHL, and 34 (59.6%) received antiviral therapy. No significant difference was found between IPLDs of full-term cCMVi patients compared to controls throughout the entire auditory pathway (I–III, III–V, and I–V IPLDs), for both ears (p > 0.05). On serial BAEP examinations, cCMVi patients presented decreased IPLDs throughout the first year of life (p < 0.05 of compared 1st, 2nd, and 3rd BAEPs in both ears).
Conclusions: Intrauterine cytomegalovirus infection does not affect the auditory brainstem maturation process in term neonates. Our findings support previous studies noting the normal neurodevelopmental outcome of asymptomatic cCMVi patients, suggesting antiviral treatment is not warranted in these cases.
What is Known: • cCMVi is a leading cause of developmental delay and hearing loss. Treatment is recommended for patients with symptomatic diseases who are at significant risk of long-term sequelae. • It is unknown whether cCMVi affects the central nervous system maturation process. | |
What is New: • We performed a neurophysiological evaluation of brainstem conduction by recording the BAEPs. We found that cCMVi has no significant impact on central conduction times along the auditory pathways in the brainstem at birth nor changes the neuronal maturation process during the first year of life. • Our findings suggest that cCMVi does not universally affect central nervous system maturation, supporting a highly selective approach when considering the benefits of antiviral therapy. |
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Abbreviations
- BAEP:
-
Brainstem auditory evoked potentials
- CCMVi:
-
Congenital cytomegalovirus infection
- CI:
-
Confidence interval
- CNS:
-
Central nervous system
- dB:
-
Decibels
- HUS:
-
Head ultrasound
- IPLD:
-
Inter-peak latency differences
- LSV:
-
Lenticulostriate vasculopathy
- MRI:
-
Magnetic resonance imaging
- SGA:
-
Small for gestational age
- SNHL:
-
Sensorineural hearing loss
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All authors contributed to the study’s conception and design. Material preparation, data collection, and analysis were performed by Danielle Bero, Hava Hafner, Andrei Chistyakov, and Michal Meir. The first draft of the manuscript was written by Michal Meir, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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This is an observational study. The Rambam Medical Center Research Institutional Ethics Committee has approved the study in accordance with the Declaration of Helsinki.
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Kassis, I., Bero, D., Hafner, H. et al. Brainstem auditory pathway maturation in term neonates with congenital cytomegalovirus infection: a cohort study. Eur J Pediatr 182, 95–100 (2023). https://doi.org/10.1007/s00431-022-04644-z
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DOI: https://doi.org/10.1007/s00431-022-04644-z