本文把至少经4周观察,临床和脑脊液异常不见改善或仍进展的脑膜炎定为慢性脑膜炎。慢性脑膜炎早期应和更常见的急性无菌性和细菌性脑膜炎区别开来。另外,慢性脑膜炎也应和许多偶与慢性脑膜炎相似但诊断及治疗措施不同的其他中枢神经系统疾病分清,这些疾病有:无菌性脑膜炎、病毒性 In this paper, meningitis, which has been observed for at least 4 weeks and whose clinical and cerebrospinal fluid abnormalities have not improved or still progressed, has been identified as chronic meningitis. Chronic meningitis should be distinguished from the more common acute and bacterial meningitis in the early stages. In addition, chronic meningitis should be distinguished from many other central nervous system diseases that are similar to meningitis but have different diagnostic and therapeutic measures, such as aseptic meningitis, viral