东北三省部份地区森林脑炎疫源地流行病学调查

１９９２～１９９４年，对黑龙江省密山市及吉林省珲春市森林脑炎疫源地进行了流行病学调查，对东北三省九地人血清进行了抗体检测。从密山和珲春地区捕获的２１８５只嗜群血蜱和１２３只森林革蜱中分离出了９株森林脑炎病毒。从当地捕获的野鼠血清中查到特异性抗体，阳性率为１２．０％。在黑龙江省的新青、密山及吉林省的珲春、抚松、靖宇等地居民血清中检出特异性抗体，阳性率分别为２．８％、２．２％、１０．９％、１．２％和４．３％。从而认为原森林脑炎自然疫源地仍然相当稳定地存在。随着经济开发，对外口岸开放，旅游事业发展，外来人群进入，其森林脑炎的威胁有可能增加，应引起重视。

Epidemiology Survey of Russian Spring Summer Exceptalitis in the Northeast area, China

Epidemiology survey on natural focus of Russian Spring Summer Encephalitis (RSSE) was conducted in the Northeast Area,China in 1992 -1994. 9 strains of RSSE virus were isolated f rom 2185 Haemaphysalis concinna and 123 Dermacentor silvarum in Mishan and Hunchun area.Antibodies against RSSE virus were detected from the sera of wild mice and local inhabitants by IFA. The postitive rates were 12.0% and 3.7%respectively. The results showed that natural focus of RSSE exists stably in Mishan and Hunchun area. With trading port opening, tourism developing, nonnative increasing, the threat of RSSE will be increasing.We should pay attention to the problem.