[Audiologic and molecular screening for hearing loss by 35delG mutation in connexin 26 gene and congenital cytomegalovirus infection].

Introduction: Hearing loss may be attributed to genetic and environmental factors. Mutations in the gene of the CX26 protein (connexin 26), are responsible for 30-80% of all cases of non-syndromic profound hearing loss. The 35delG is the most frequent variant in the caucasian population.