Standard case definitions of acute bacterial meningitis and invasive meningococcal disease for routine and outbreak surveillance

Acute bacterial meningitis and invasive meningococcal disease are global public health threats that require sustained control efforts. Under the framework of Defeating meningitis by 2030: a global road map, the World Health Organization has developed and updated standard case definitions to strengthen disease surveillance, support timely outbreak detection and response, and ensure consistent data collection and reporting across health care settings and systems.