Abstract
Background
Children exposed antenatally to Zika virus (ZIKV) during the 2015-2016 epidemic are now in school; little is known about their neurodevelopment at this age. The objective was to evaluate neurodevelopment of ZIKV-exposed Colombian children compared to non-exposed controls at ages 5–6.
Methods
In total, 48 normocephalic children with antenatal ZIKV exposure (Cases) were recruited for a longitudinal cohort study in Atlántico, Colombia. Two age-matched control groups of 118 non-ZIKV-exposed children were recruited from same communities as Cases: 63 born before ZIKV epidemic but experienced COVID-19-related school entry delays, and 55 born post-ZIKV epidemic but started school on time. Multi-domain neurodevelopment was assessed at 5–6 years using standardized measures. Standard regression and proportional odds models were used to compare outcomes. P values were adjusted using the Benjamini-Hochberg false discovery rate (FDR) (p < 0.05).
Results
There were no differences in age at assessment between groups. Case Full-Scale IQ scores were lower than both control groups (p = 0.002), driven by visual reasoning (p < 0.001). Controls with school entry delay had more executive control problems and lower adaptive functioning skills than Cases and Controls without school entry delay.
Conclusions
ZIKV-exposed children have lower cognitive performance compared to controls. Early childhood experiences can affect pediatric outcomes research.
Impact
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Normocephalic ZIKV-exposed children have lower full-scale IQ than their unexposed peers from the same communities.
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Normocephalic children with antenatal ZIKV exposure have differences in neurodevelopment that can impact them long-term.
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There is a need for continued follow-up of children with antenatal ZIKV exposure to determine long-term effects on higher-order areas of cognitive function.
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Data availability
De-identified data are available from the corresponding author upon reasonable request.
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Acknowledgements
The authors would like to thank the children and families in this study for their continued engagement and participation across years of research and evaluation. We thank Liliana Villegas Echeverri, Daniela Rodriguez, Julieth Cajar, and Lida Utria for conducting the neuropsychological evaluations of the participants. We are also thankful for Ana Cecilia Perez, Ramiro Galindo, Javier Restrepo, Miguel Castillo, Lorenzo Cervantes, and Jose Ospino, the research study coordinators and assistants from BIOMELab in Barranquilla, Colombia, for their long-standing collaboration and dedication to this research. Finally, the authors thank Drs. Adre du Plessis, Roberta DeBiasi, and David Wessel for their support of this research and of the Congenital Infection Program at Children’s National Hospital.
Funding
Research reported in this publication was supported by the Eunice Kennedy Shriver National Institute of Child Health & Human Development of the National Institutes of Health under Award Numbers R01HD102445 and 3R01HD102445-04S1 (PI: Mulkey), and P50HD105328-01 (PI: Gaillard). The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health.
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S.B.M. conceptualized and designed the study, obtained funding for the study, developed data collection instruments, trained the study team, reviewed study data, interpreted study data and results of data analyses, drafted the initial manuscript, and reviewed and revised the manuscript. R.A.-S. trained the study team, collected study data, reviewed study data, interpreted study data and data analyses, drafted the initial manuscript, and reviewed and revised the manuscript. E.C. trained the study team, collected study data, reviewed study data, interpreted study data, and reviewed and revised the manuscript. M.E.W. reviewed study data, interpreted study data, developed figures for the manuscript, and reviewed and revised the manuscript. M.A.-W. conceptualized and designed the study, translated data collection instruments, trained the study team, oversaw the use of telehealth for study activities, and reviewed and revised the manuscript. R.H.P. analyzed and interpreted study data, drafted initial tables for the manuscript, and reviewed and revised the manuscript. C.P. conceptualized and designed the study, trained the study team, reviewed study data, and reviewed and revised the manuscript. M.E.M. conceptualized and designed the study, provided additional insight into data interpretation, and reviewed and revised the manuscript. C.C. conceptualized and designed the study, recruited study participants, oversaw data collection, reviewed study data, and reviewed and revised the manuscript. M.M.B. conceptualized and designed the study, trained the study team, reviewed and interpreted data and data analyses, drafted the initial manuscript, and reviewed and revised the manuscript. All authors approved the final manuscript as submitted and agree to be accountable for all aspects of the work.
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Mulkey, S.B., Andringa-Seed, R., Corn, E. et al. School-age child neurodevelopment following antenatal Zika virus exposure. Pediatr Res 98, 1856–1863 (2025). https://doi.org/10.1038/s41390-025-03981-7
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DOI: https://doi.org/10.1038/s41390-025-03981-7


