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本文对永州市1956～1996年乙脑发病情况作了流行病学分析。平均发病率为8.59/10万。病例主要集中在6～8月,占全年总发病率的93.5%,流行高峰时间比国内报导时间提前一个月;山南气候区(高山、丘陵)居民乙脑发病率高于山北气候区(丘陵);五岁以下散居儿童是乙脑的主要侵害对象,男性发病高于女性;男女性别比为1.53:1。
This paper made an epidemiological analysis of the incidence of Japanese encephalitis in Yongzhou from 1956 to 1996. The average incidence was 8.59 / 100,000. The cases mainly concentrated in June to August, accounting for 93.5% of the total annual incidence, the peak time of epidemic was one month ahead of the time of domestic reporting. The incidence of Japanese encephalitis in Shannan climate zone (alpine and hilly) was higher than that in Shanbei climate zone ). Diaspore children under the age of 5 were the major targets of JE, with the incidence of male being higher than that of female; the ratio of male to female was 1.53: 1.