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Newborn Screening Ontario
Expanded Hearing Screening

Blood Spot Screening for Hearing Loss Risk Factors

The purpose of using the dried blood spot is to screen for hearing loss risk factors.  These risk factors can result in congenital hearing loss (hearing loss present at birth) or hearing loss that can occur in early childhood (before the age of 6 years).  Babies and children who are identified with hearing loss as early as possible can have access to support and services sooner and have better outcomes.  

The hearing loss risk factor blood spot screen can detect congenital cytomegalovirus (cCMV) infections. Congenital CMV infections are the most common cause of non-genetic permanent hearing loss.

Printable information about blood spot screening for hearing loss risk factors can be found here: Blood Spot Screening for Hearing Loss Risk Factors.