Group B streptococcus meningitis complicated by periodic lateralising epileptiform discharges in an elderly patient with type 2 diabetes mellitus.

(group B streptococcus or GBS) is the most common cause of bacterial meningitis in infants, but is rarely the cause in adults. Across all non-pregnant adults it comprises 7% of bacterial meningitis cases, with a mortality rate of 56% in the elderly. Therefore, while rare, GBS should be a part of a patient's differential when initiating antibiotics in adults with chronic illnesses.