Investigation on potential natural foci of plague in Zhangjiakou competition zone of the 2022 Beijing Winter Olympic Games
Objective To analyze the survey data of plague in Zhangjiakou competition zone(Chongli District)of the 2022 Beijing Winter Olympic Games and plague natural focus(Kangbao County)of Hebei Province from 2018 to 2021,and compare the differences in host and vector composition and physical geography landscape between the two areas,so as to provide scientific basis for the study of potential plague natural focus in Chongli District.Methods From 2018 to 2021,rodents were captured by the 5m-clip method and sampling method in Chongli District and Kangbao County,and the captured rodents and vector fleas were classified and identified;Pathogenic detection of plague was carried out.The survey data were organized and summarized using Excel 2010,and statistical analyzed using SPSS 19.0 software.Results In Chongli District,42 000 effective clamps were placed by the 5m-clip method,and 515 rodents were captured with the capture rate as 1.23％;20 sample points were surveyed,but no rodents was captured;218 rodent body fleas were captured,and the flea index was 0.42;Yersinia pestis was not detected in rodents.In Kangbao County,14 844 effective clamps were placed by the 5m-clip method,and 304 rodents were captured with the capture rate as 2.05％;A total of 1 060 hm2 were surveyed,and 231 rodents were captured,with the average rodent density as 0.22 rodents/hm2;821 rodent body fleas were captured,and the flea index was 1.53;Six strains of Yersinia pestis were detected from rodents,three from Meriones unguiculatus,two from Cricetulus barabensis,and one from Phodopus sungorus.The average density of Cricetulus barabensis in Chongli District was significantly lower than that in Kangbao County(Z=-2.309,P＜0.05).Conclusion The composition of rodents and vector fleas in Chongli District and Kangbao County are obviously different,and there are also obvious differences in physical geography landscape.It is unlikely that primary plague among animals will occur in Chongli District.
NETL
NSTL
万方数据
