细菌性脑膜炎主要侵犯儿童,老年人罹患较少。特别是老年人患细菌性脑膜炎时临床症状不典型,而且死亡率极高。死亡率高与某些因素有关,如年龄、潜在性疾病、早期误诊以及由脑脊液分离出来的不寻常病原体。这种不寻常的病原体与革兰氏阴性杆菌、金黄色葡萄球菌、肠球菌 D 菌属、 Bacterial meningitis mainly affects children, and the elderly suffer less. In particular, elderly patients with bacterial meningitis clinical symptoms are not typical, and the mortality rate is extremely high. High mortality is associated with factors such as age, underlying disease, early misdiagnosis, and unusual pathogens that are separated by cerebrospinal fluid. This unusual pathogen is associated with Gram-negative bacilli, Staphylococcus aureus, Enterococcus faecium,