Skip to Content
Newborn Screening Ontario
Expanded Hearing Screening

Screen Negative Result

Blood spot screening for hearing loss risk factors was performed based on a referral to an Infant Hearing Program audiologist and with consent to the expanded hearing screen.  The hearing loss risk factor blood spot screen was negative for (did not detect) cytomegalovirus.  

What did the hearing loss risk factor blood spot screen rule out?

The hearing loss risk factor blood spot screen is a screen for congenital cytomegalovirus (cCMV) infection.  It cannot rule out cCMV infection entirely as the sensitivity is less than 100%.  This means that a small number of cases of cCMV infection will not be detected through screening. 

If a baby’s doctor has any concerns regarding possible cCMV infection, additional forms of testing for CMV are recommended.

What does a screen negative result mean?

If a baby has confirmed hearing loss, the hearing loss risk factor blood spot screen did not detect a cause for it.

If a baby has had a normal hearing test, then they are not at increased risk for hearing loss based on these results.  They can still be at increased risk for hearing loss based on the information collected by the hearing screener or for risk factors not detected by the blood spot screen.

Will this change a baby's follow up?

If a baby has had a:

  • Normal hearing test and no known risk factors for hearing loss - no follow up for hearing loss is required.  If any concerns arise regarding a baby’s hearing, parents should follow up with their child's health care provider.

OR

  • Normal hearing test and one or more risk factors for hearing loss - they will be followed as outlined by the Infant Hearing Program. 

OR

  • Abnormal hearing test - they will be followed for their hearing loss by the Infant Hearing Program.  The hearing loss risk factor blood spot screen did not detect cCMV as the cause for the baby's hearing loss.  

Where will the results be sent?

Results from the hearing loss risk factor blood spot screen will be sent to the Infant Hearing Program (IHP).  Family doctors can contact the IHP Lead Agency or IHP audiologist that is involved with the baby's care to request these results.