Browsing by Author "Bisso, Fred"

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    Congenital cytomegalovirus in eastern Uganda : prevalence and outcomes.
    (BMC Pediatrics, 2025) Okalany, Regina Akwi Noela; Engebretsen, Marie S. Ingunn; Mukunya, David; Chebet, Martin; Okello, Francis; Weeks, D. Andrew; Mwanda, Edrin; Muhindo, Rita; Bisso, Fred; Tylleskär, Thorkild; Olupot-Olupot, Peter; Burgoine, Kathy
    Background: Cytomegalovirus (CMV) infection poses risks to both maternal and neonatal health, however there are limited comprehensive data on congenital CMV in low-resource settings where the virus is widespread, particularly among women of reproductive age. Our research in eastern Uganda aimed to assess the prevalence of congenital CMV and outcomes among infants to inform public health policies and interventions in similar settings, addressing a significant gap in current knowledge. Methods: We conducted a descriptive study, nested within the BabyGel Trial, across Mbale and Budaka districts in eastern Uganda, between May 2023 and January 2024. Infants underwent saliva sampling within the first week of life, which was validated through urine polymerase chain reaction testing within the first 21 days of life. At three months of age, a cranial ultrasound examination, neurological examination, developmental evaluation, and audiological assessment were conducted for all infants diagnosed with congenital CMV infection. Statistical analyses were performed using Stata 17.0. Results: Congenital CMV infection was found in 5 out of 1,265 newborns tested, indicating a prevalence of 0.4% (95% CI: 0.16 to 0.96). Of these 5 infected infants, two experienced febrile illness at birth and required hospitalisation within the first week of life, and three had findings on ultrasound examination consistent with congenital cytomegalovirus during the neonatal period. Audiologic follow-up until three months of age revealed that three infants had failed unilateral and bilateral hearing screening. Neurodevelopment assessments using the Malawi Development Assessment Tool fell within optimal ranges for all 5 infants; however, when evaluated using the Hammersmith Infant Neurological Examination, four infants scored below optimal levels. Conclusion: Our community-based study revealed a low prevalence of congenital CMV infection. Further longitudinal multi-site research is needed to assess the generalisability of these findings. Also, long-term follow-up of children is crucial to understanding the outcomes and sequelae of infected infants to inform prevention strategies, targeted interventions and scalable screening frameworks in resource-limited settings. Keywords: Cytomegalovirus, Congenital, Prevalence, Neurodevelopment, Hearing, Low-resource setting, Uganda
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    Postnatal cytomegalovirus infection and its effect on hearing and neurodevelopmental outcomes among infants aged 3–10 months : a cohort study in Eastern Uganda.
    (PLOS One, 2025) Okalany, Regina Akwi Noela; Mukunya, David; Olupot-Olupot, Peter; Chebet, Martin; Okello, Francis; Weeks, D. Andrew; Bisso, Fred; Tylleska¨r, Thorkild; Burgoine, Kathy; Engebretsen, Marie Stadskleiv Ingunn
    Background Hearing impairment and neurodevelopmental disorders pose a significant global health burden in children. The link between postnatal cytomegalovirus (CMV) infection and these outcomes remains unclear. This study explored the association of postnatal CMV infection with hearing and neurodevelopmental outcomes in term infants aged 3 to 10 months. Methods This was a cohort sub-study within the BabyGel cluster randomised trial in Eastern Uganda. From 1265 term infants screened for CMV, 219 were negative at birth but positive at 3 months, and were age-matched with 219 CMV-negative controls. CMV status was determined by PCR screening of saliva samples, with positive results confirmed using urine samples (Chai Open qPCR, Santa Clara, CA). From the established cohort, 424 infants were successfully followed up between 3 to 10 months of age. Clinical assessments included neurodevelopmental evaluation using the Malawi Developmental Assessment Tool, the Hammersmith Infant Neurological Examination, and hearing screening using Otoacoustic Emission testing (Otoport Lite, Otodynamics Limited). Statistical analyses were performed using descriptive statistics, chisquare tests and log binomial regression models with Stata 18. Results Of the 424 infants included in the study, 206 were postnatal CMV-infected and 218 were uninfected. Neurodevelopmental assessments indicated no differences between postnatalCMV-infected infants and uninfected groups (ARR 0.88, 95% CI [0.67, 1.15], p = 0.346). Hearing screening revealed a 1.99-fold increased risk of a positive result for postnatal CMVinfected infants compared to uninfected infants (67/106 vs. 39/106, 95% CI [1.27, 3.12], p = 0.003). Conclusion Postnatal CMV infection was associated with more positive hearing screenings, though no significant differences in neurodevelopmental outcomes were observed in early infancy. Exploration into the feasibility of incorporating hearing and CMV screening into routine care will play a vital role in early identification and intervention, improving the management of both hearing and CMV-related conditions in resource-limited settings