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A prospective study on congenital and acquired cytomegalovirus infections in infants
Insights
Congenital cytomegalovirus (CMV) infection affects 0.3% of Swedish newborns, with most showing no immediate symptoms or long-term effects. Acquired CMV infections are common in infants within months of birth.
Area of Science:
- Virology
- Pediatrics
- Infectious Diseases
Background:
- Cytomegalovirus (CMV) is a common virus that can cause congenital infections in newborns.
- Congenital CMV infections can lead to various clinical manifestations and potential long-term sequelae.
- Understanding the prevalence and clinical impact of congenital CMV is crucial for early detection and management.
Purpose of the Study:
- To investigate the prevalence and clinical characteristics of congenital and acquired cytomegalovirus (CMV) infections in a cohort of Swedish infants.
- To assess the short-term clinical outcomes and potential sequelae in infants with congenital CMV infection.
- To compare the incidence of CMV infection in control infants and explore maternal factors.
Main Methods:
- Prospective virological and clinical study over a 1-year period.
- Virus isolation used to diagnose congenital CMV infection in newborns.
- Clinical assessment and follow-up for up to 9 months, including monitoring for symptoms and developmental milestones.
Main Results:
- Congenital CMV infection detected in 7 out of 2200 Swedish newborns (0.3%).
- Two infants with congenital CMV presented with symptoms like hepatosplenomegaly and petechiae; others were asymptomatic.
- No sequelae observed in congenitally infected infants during the follow-up period; 50% of control infants acquired CMV postnatally.
Conclusions:
- Congenital CMV infection is relatively uncommon in Swedish newborns but can occur asymptomatically.
- Current follow-up suggests a lack of short-term sequelae in infants with congenital CMV.
- Acquired CMV infections are frequent in infants, highlighting the importance of continued surveillance and understanding transmission routes.
Abstract:
A preliminary report is presented on a current prospective virological and clinical study of congenital and acquired infant cytomegalovirus (CMV) infections. During a 1-year period, 7/2200 newborn Swedish infants investigated (0.3%) had a congenital CMV infection as shown by positive virus isolation. Two of them had typical symptoms, hepatosplenomegaly and petechiae in one case and splenomegaly in the other one. All of them had a normal birth weight and normal head circumference. No sequelae have been observed during an observation period of up to 9 months. Five out of 10 control infants followed-up acquired a CMV infection within a few months. 5/7 mothers of the congenitally infected infants and 3/14 mothers of the control infants were primiparas.