Invasive Meningococcal Disease in Adults Aged ≥65 Years Admitted to French Intensive Care Units: A Nationwide Comparison With Younger Adults

Critically ill older adults with IMD exhibit atypical clinical features, a high prevalence of serogroup W, and nearly triple the in-hospital mortality of younger patients. These findings emphasize the need for high clinical suspicion, rapid antibiotic therapy, and potential expansion of vaccination strategies to include older populations.