Abstract
This investigation consisted of a longitudinal study of the effects of congenital
cytomegalovirus (CMV) infection on hearing sensitivity in 860 children with documented
asymptomatic or symptomatic congenital CMV infection. Of the 651 children with asymptomatic
CMV infection, 48 (7.4%) developed sensorineural hearing loss (SNHL), compared to
85 (40.7%) of the children with symptomatic CMV infection. Children in both groups
experienced latent effects consisting of delayed onset of loss, threshold fluctuations,
and/or progressive loss of hearing. It can be concluded that congenital CMV infection
is a leading cause of SNHL in children. The late onset and progression of loss necessitates
continued monitoring of hearing sensitivity in this population.
Abbreviations: ABR = auditory brainstem response, CMV = cytomegalovirus, OAEs = otoacoustic emissions,
SNHL = sensorineural hearing loss
Key Words
Congenital cytomegalovirus infection - delayed-onset hearing loss - fluctuating hearing
loss - progressive hearing loss - sensorineural hearing loss