How Congenital Cytomegalovirus (CMV) Impacts Hearing in Indonesian Children

When we think about childhood hearing loss, genetic conditions or loud noise often come to mind. But a surprisingly common culprit is a virus transmitted during pregnancy—cytomegalovirus (CMV). This often-overlooked infection is one of the leading non-genetic causes of permanent hearing loss in children.

In Indonesia, congenital CMV is more widespread than many realize, yet remains underdiagnosed and under-recognized. Here's what every parent should know.

What Is Congenital CMV?

CMV is part of the herpesvirus family and is carried harmlessly by most adults. During pregnancy, a new or recurring infection can cross the placenta and infect the fetus—this is known as congenital CMV.

Many affected babies appear healthy at birth, but the virus can silently damage parts of the inner ear, leading to sensorineural hearing loss—often delayed, progressive, or affecting only one ear.

Jakarta Study Highlights Urgent Need

A study conducted at Dr. Cipto Mangunkusumo Hospital (2016–2017) found:

• 5.8% of 411 newborns tested positive for congenital CMV
• 29% of those developed hearing loss by age five
• Many cases were diagnosed only after speech delays or poor response to sound became apparent

What Parents Should Know and Do

During Pregnancy:

• CMV spreads through saliva and urine, especially from toddlers
• Avoid sharing utensils, cups, or food with young children
• Wash hands frequently, especially after changing diapers

After Birth:

• Watch for failed hearing tests or delays in speech development
• Understand that hearing loss may be progressive and not present at birth

Take Action

Once your child is diagnosed with CMV and you suspect hearing loss, schedule a hearing evaluation at a trusted diagnostic center.

SOUNDLIFE Hearing Center provides accurate diagnosis and early support for children with hearing loss. Early identification allows for timely intervention, which can significantly improve speech, language, and social development outcomes.

Visit SOUNDLIFE to book a consultation or learn more.

Final Thought

Congenital CMV is a common but often silent cause of hearing loss in children. With greater awareness, earlier testing, and appropriate support, children affected by CMV can still develop and thrive with confidence.

Early detection can make a big difference for your child’s future.