Abstract
An 88-year-old male presented with sepsis and multi-organ dysfunction due to Neisseria meningitidis serogroup B (MenB) infection, a severe and often atypical presentation in the elderly. His condition, characterized by subtle symptoms, rapidly improved with early broad-spectrum antibiotics, susceptibility-guided therapy, and multidisciplinary care. The patient fully recovered and was discharged on day 8, highlighting the importance of prompt diagnosis and aggressive support in this vulnerable population.