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１９９８年６月２６日我们选择龙潭镇中心河做哨鼠接触疫水不同时间感染情况研究。结果如下。１ 材料和方法 ①哨鼠 由南京铁道医学院实验动物中心提供，重２３ｇ左右的体健雄鼠。②方法 参照徐国余等哨鼠疫水测定方法放哨鼠［１］。９０只哨鼠分成４个组，放置时间分别为
June 26, 1998 We selected Longtan Town center river infected rats infected with water at different times of infection. The result is as follows. 1 Materials and methods ① Sentry rats from Nanjing Railway Medical College Experimental Animal Center, weighing about 23g healthy male rats. ② methods refer to Xu Guyu sentinel water determination method Wushen mice [1]. 90 sentinel rats divided into 4 groups, placing time respectively