Reversible hearing loss after meningitis. Prospective assessment using auditory evoked responses

Area of Science:

• Pediatrics
• Neurology
• Audiology

Background:

• Meningitis is a serious infection affecting the central nervous system.
• Hearing loss (HL) is a potential complication of meningitis, particularly in children.
• The incidence and long-term effects of meningitis-related HL require further investigation.

Purpose of the Study:

• To prospectively evaluate the incidence and severity of hearing loss in children with meningitis.
• To differentiate HL rates between bacterial, viral, and tuberculous meningitis.
• To assess the reversibility of hearing loss and identify risk factors for permanent impairment.

Main Methods:

• Prospective study of 236 children diagnosed with meningitis.
• Utilized brainstem auditory evoked responses (BAER) for hearing assessment.
• Evaluated hearing in the acute phase and at a 6-month follow-up for a subset of patients.

Main Results:

• Hearing loss detected in 16.1% during the acute phase and 5.2% at 6 months.
• Bacterial meningitis showed higher HL incidence (25.4% acute, 8% 6-month) than viral or tuberculous meningitis.
• Of those with initial HL, 31.2% had permanent loss; severe losses were more likely to be permanent.

Conclusions:

• A significant proportion of children with meningitis develop hearing loss, particularly with bacterial meningitis.
• Auditory screening is recommended for all meningitis patients during convalescence.
• Early and intermediate hearing losses are often reversible, while severe losses may persist.