<prompt> Prior to discharge of a patient of H. influenza meningitis the essential investigation to he done is ?ABEREEGDevelopmental screening testECG  <response>: Ans. is a i.e., ABER o After H. influenza meningitis sensorineural hearing loss occurs in 5-10 of patients during long term follow up. o Therefore Auditory Brain Stem Evoked Response is done to check the peripheral auditory system. 