Incidence and impact of CMV infection in very low birth weight infants

Area of Science:

• Neonatalogy
• Infectious Diseases
• Pediatric Neurology

Background:

• Congenital cytomegalovirus (CMV) is a primary cause of non-genetic deafness and neurodevelopmental impairment in infants.
• Data on congenital CMV in preterm infants, particularly those with very low birth weight (VLBW), is limited.
• Understanding congenital CMV's impact on VLBW infants is crucial for early intervention and management.

Purpose of the Study:

• To determine the incidence of congenital CMV infection in VLBW infants.
• To investigate the association between congenital CMV and adverse outcomes in VLBW infants.
• To compare outcomes of congenitally infected VLBW infants with uninfected controls.

Main Methods:

• Screening of VLBW infants admitted to a neonatal intensive care unit for congenital CMV.
• Identification of CMV status and clinical outcomes using patient databases and medical records.
• Multivariate analysis to assess the association of congenital CMV with death, neurological injury, hearing loss, and motor development.

Main Results:

• The incidence of congenital CMV in VLBW infants was 0.39%.
• Congenital CMV was significantly associated with higher rates of hearing loss (83% vs. 2.1%), abnormal neuroimaging (72% vs. 25%), and adverse motor development (43% vs. 9%).
• Congenital CMV was not associated with increased mortality; acquired CMV also showed no adverse outcome associations.

Conclusions:

• Congenital CMV infection in VLBW infants is common and strongly associated with significant neurological injury and hearing loss.
• While congenital CMV does not increase mortality risk in VLBW infants, its neurological and auditory sequelae necessitate vigilant monitoring and care.
• Early detection and management strategies for congenital CMV in VLBW populations are critical to mitigate long-term developmental impacts.