The American Academy of Pediatrics has published a clinical report on congenital cytomegalovirus that goes beyond the 2024–2027 Red Book, covering epidemiology, the clinical spectrum from symptomatic disease to isolated sensorineural hearing loss, diagnosis, initial evaluation, treatment and prevention, with key action statements attached.
The screening question is where it takes a position. Universal screening catches every infected infant, including the asymptomatic majority who will never develop a problem, and commits a health system to following them. Hearing-targeted screening tests only those who fail the newborn hearing screen, and misses infants whose hearing loss appears later. The report recommends hearing-targeted plus expanded testing — a middle position that broadens the trigger beyond the hearing screen alone without going universal.
The practical point for a paediatrician is that congenital CMV has a narrow diagnostic window. Testing after three weeks of age cannot distinguish congenital from postnatally acquired infection, and postnatal acquisition in a term infant is usually harmless. Whatever screening approach a unit uses, the decision to test has to be made in the first three weeks or it cannot be made at all.
- Test within the first 21 days of life — urine or saliva PCR — or the result cannot establish congenital infection.
- Refer any infant failing the newborn hearing screen for CMV testing while still inside that window.
- Extend testing beyond the hearing screen to infants with small head circumference, growth restriction, petechiae, hepatosplenomegaly or unexplained thrombocytopenia.
- Arrange audiology follow-up for every confirmed infant — hearing loss in congenital CMV is often late-onset and progressive, so one normal test is not the end of it.
- In India, where newborn hearing screening coverage is uneven, the practical limitation is usually the screen rather than the CMV test that follows it.
Why it matters
Congenital CMV is the leading non-genetic cause of sensorineural hearing loss, and the diagnostic window closes at three weeks.
Don't overread it
This is a clinical report and a recommendation, not a trial of screening strategies against outcomes.
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