No use of performing test at this stage to diagnose congenital infections. Mostly its a clinical diagnosis if all other finding are there. BERA tests only signify extent of hearing loss. Less likely congenital infection as a cause in two siblings that too after a gap of 2 years. Consult your pediatrician or pediatric neurologist for any other inherited disease or syndromic association. He will definitely advice you some more tests if needed after complete clinical examination.
Answered2017-11-22 06:58:43
Let others know if this answer was helpful