Greenwood B M, Cleland P G, Haggie M H, Lewis L S, Macfarlane J T, Taqi A, Whittle H C
Trans R Soc Trop Med Hyg. 1979;73(5):563-6. doi: 10.1016/0035-9203(79)90053-1.
1,003 patients with meningococcal disease admitted to a single hospital during the course of a three-month epidemic were studied. A progressive decline in mortality, especially among patients with acute meningococcaemia, and a falling incidence of systemic and severe neurological complications among patients with meningitis were observed. It is suggested that the virulence of the causative group A meningococcus declined as the epidemic progressed.
在一场为期三个月的疫情期间,对一家医院收治的1003例脑膜炎球菌病患者进行了研究。观察到死亡率呈逐渐下降趋势,尤其是急性脑膜炎球菌血症患者,并且脑膜炎患者出现全身及严重神经并发症的发生率也在下降。有人认为,随着疫情的发展,致病性A群脑膜炎球菌的毒力有所下降。