1970年6月19日～10月11日美国的 Rich-mond Va 发生了一次 Echo 3型病毒所致的脑膜炎流行。共发生了80例。作者对这次流行做了流行病学、临床、血清学及病毒分离等方面的调查研究。近年来,在散发或流行的无菌性脑膜炎中 Echo病毒很快成为主要的病毒病原。但美国70年前的多次流行中,经病毒学鉴定多为4、6、9及30型,70年 Echo 3型引起的流行首次被报导。70年前 Echo From June 19 to October 11, 1970, a meningitis caused by the Echo type 3 virus occurred in the Rich-mon Va in the United States. A total of 80 cases occurred. The author made epidemiological, clinical, serological and viral isolation and other aspects of the epidemic. In recent years, Echo virus has rapidly become the major viral pathogen in the dissemination or epidemic of aseptic meningitis. However, the prevalence of 70-year-old Echo 3 type was first reported in many epidemics in the United States 70 years ago, most of which were identified as type 4, 6, 9 and 30 by virology. 70 years ago Echo