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目的分析地震前后四川省青海田鼠疫源地媒介蚤类种群变化,为做好鼠防工作提供对策。方法统计、分析四川省2005-2011年期间的鼠疫调查与监测资料。结果调查发现青海田鼠平均密度191.43只/ha,地震前后媒介蚤均以细钩盖蚤为主,占67.34%和61.56%,直缘双蚤指名亚种次之,占30.82%和38.12%,青海田鼠寄生蚤染蚤率地震前的9月(54.2%)和地震后的6月(55.24%)较高,而蚤指数以震前的9月(1.00)和震后5月(1.29)较高,染蚤率或蚤指数有一定的季节变化。检验媒介蚤8种、12 922匹,分离鼠疫菌3株,感染鼠疫的媒介蚤为细钩盖蚤。结论地震前后四川省青海田鼠疫源地蚤类种群有一定变化,地震前后染疫媒介蚤均有细菌分离,说明青海田鼠动物鼠疫持续存在,提示继续加强监测,严防人间鼠疫发生。
Objective To analyze the changes of fleas in the field of Microtus fortis in Qinghai, Sichuan Province before and after the earthquake so as to provide countermeasures for the prevention of rat plague. Methods Statistics and analysis of the plague investigation and monitoring data in Sichuan province during 2005-2011. The results showed that the average density of Qinghai voles was 191.43 ha / ha. Before and after the earthquake, the majority of the media fleas were 67.49% and 61.56%, respectively, and the dominant species were 30.82% and 38.12%, respectively. Qinghai The flea flea rate of field vole was higher in September (54.2%) before quake and June (55.24%) after quake than in earthquake, while flea index was higher in September (1.00) and post-earthquake May (1.29) , Flea flea rate or flea index has a certain seasonal changes. 8 kinds of vector fleas were tested, 12 922 horses, 3 strains of Yersinia pestis were isolated, and the vector fleas infected with the plague were fine hooked fleas. Conclusion Before and after the earthquake, the population of the fleas in the field of voles in Qinghai Province had some changes. Before and after the earthquake, all the bacteria were isolated from the vector fleas. It indicated that the animal plague in Qinghai voles persisted continuously, suggesting that the monitoring should be strengthened to prevent the occurrence of human plague.