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Congenital cytomegalovirus infection and sensorineural hearing loss
Insights
Congenital cytomegalovirus (CMV) infection in newborns can lead to severe hearing loss and developmental issues. Early screening is recommended to identify at-risk infants for timely intervention and habilitation.
Area of Science:
- Virology
- Pediatrics
- Public Health
Background:
- Congenital cytomegalovirus (CMV) infection is a significant concern in neonatal health.
- The long-term effects of congenital CMV infection on infant development require further investigation.
Purpose of the Study:
- To assess the incidence of congenital CMV infection in a large infant cohort.
- To evaluate the audiological, ophthalmological, neurological, and psychological outcomes in infants with congenital CMV.
- To determine the risk factors and potential preventive strategies for congenital CMV infection.
Main Methods:
- A prospective study involving 10,328 infants over a 5-year period (1977-1982).
- Virus isolation in urine within the first week of life to diagnose congenital CMV infection.
- Follow-up assessments included audiological, ophthalmological, neurological, and psychological testing.
Main Results:
- Fifty infants (0.5%) were diagnosed with congenital CMV infection.
- Four infants developed total deafness, and one had a possible mild hearing disorder.
- One case of severe deafness was linked to severe mental retardation and spastic tetraplegia, with maternal primary CMV infection in the first trimester.
Conclusions:
- Congenital CMV infection poses a significant risk for severe hearing impairment and neurological deficits in infants.
- Maternal CMV infection timing (primary vs. secondary) influences infant outcomes.
- Newborn screening for congenital CMV infection is recommended to facilitate early detection and intervention for at-risk infants, particularly for deafness.
- The effectiveness of current vaccination strategies against congenital CMV warrants further evaluation.
Abstract:
In a prospective study still in progress, infants with congenital cytomegalovirus (CMV) infection were followed with audiological, ophthalmological, neurological, and psychological tests; 10,328 infants were investigated within a 5-year period (1977-1982) by virus isolation in urine within the first week of life. Fifty (0.5%) had a congenital CMV infection. In this group four children turned out to have total deafness and a fifth possibly a mild hearing disorder. In one case the deafness was associated with severe mental retardation and spastic tetraplegia. The mother of the child had a primary CMV infection in the first trimester. In one of the other cases of severe deafness it could be proven that the mother had had a secondary CMV infection and in further two cases, presumed secondary infections. Prospective serological tests of the mothers would not have revealed more than one of the high risk pregnancies. The value of vaccination against congenital CMV infection is questioned. Screening of newborn infants for congenital CMV infection is recommended in order to reveal infants at high risk for deafness and make an early habilitation possible.