Abstract: Objective To investigate and analyze the epidemiological characteristics of animal plague in Siziwang banner, Ulanqab, Inner Mongolia, China from 2009 to 2019, and to provide a basis for scientific prevention and control of plague. Methods Surveillance was performed on the plague in Jiang'an sum and Honggor sum and their surrounding areas according to the Plague Monitoring Scheme of Inner Mongolia from April to November each year from 2009 to 2019. The rodent density was investigated using the trap-on-the-day method with bow-shaped clamps, nocturnal rodents were investigated using the 5-meter clamp method, and the fleas were captured by grooming. According to the diagnostic criteria for plague (WS 279-2008), etiological tests were performed on the testable materials from the rodents and fleas, and serological tests were performed on the blood samples of the rodents using indirect hemagglutination assay. Results During 2009-2019, the mean rodent density was 2.30 mice/hm² in the plague foci of Siziwang banner, Ulanqab, with the density of Meriones unguiculatus being 1.71 mice/hm². The capture rate of nocturnal rodents was 1.96%. The flea infestation rate of rodents was 27.37% and the total flea index was 1.55. Seventeen positive rodents and 32 positive fleas were found by the etiological tests. Sixty positive serum samples were found by the serological tests. Conclusion The epidemic of animal plague in Siziwang banner, Ulanqab is active from 2009 to 2019, with a potential new round of epidemic peak in the future. Plague surveillance should be strengthened to prevent prevalence of human plague.

Key words: Siziwang banner, Plague, Epidemiological characteristics, Analysis

摘要： 目的 调查分析内蒙古自治区乌兰察布市四子王旗2009－2019年动物鼠疫流行特征，为科学防控鼠疫提供依据。方法 参照《内蒙古自治区鼠疫监测工作方案》，于2009－2019年每年的4－11月对江岸苏木和红格尔苏木及其周边地区进行鼠疫监测。采用弓形夹日法进行鼠密度调查，采用5 m夹线法调查夜间鼠，梳检捕获鼠体蚤，按照《鼠疫诊断标准》（WS 279－2008）对鼠、蚤可检材料进行病原学检测，采用间接血凝试验对鼠类血样进行血清学检测。结果 2009－2019年，乌兰察布市四子王旗鼠疫疫源地的平均鼠密度为2.30只/hm²，其中长爪沙鼠密度为1.71只/hm²；夜间鼠捕获率为1.96%；鼠体染蚤率为27.37%，总蚤指数为1.55；病原学检测共检出阳性动物17只，阳性蚤类32匹；血清学检测共检出阳性血清60份。结论 乌兰察布市四子王旗2009－2019年间动物鼠疫疫情处于活跃状态，未来存在新一轮流行高峰的可能。今后应继续加强鼠疫监测，防止人间鼠疫的发生。

关键词: 四子王旗, 鼠疫, 流行特征, 分析