An analysis of the epidemiological characteristics of human plague in Inner Mongolia Autonomous Region,China,1950-2021
Objective To investigate the general situation of human plague in Inner Mongolia Autonomous Region(Inner Mongolia)and to grasp the dynamics and trend of the epidemic,so as to provide a basis for the prevention and control of the plague.Methods The descriptive epidemiological method was applied for the analysis of the data of human plague cases in Inner Mongolia from 1950 to 2021.Chi-square test was used for comparison of counting data.Results From 1950 to 2021,271 cases of plague were reported in Inner Mongolia,with 130 deaths(case fatality rate:47.97%).The cases were mainly distributed in 88 epidemic foci in 26 banners(counties and districts)of 8 leagues(cities),i.e.,Tongliao,Chifeng,Xing'an League,Xilin Gol League,Ordos,Bayannur,Ulanqab,and Baotou.The plague peaked from July to August,during which 20 outbreaks were observed.The case fatality rates of plague in the natural plague foci of Spermophilus dauricus and Meriones unguiculatus were 51.84%and 32.00%,respectively,with no significant differences between the two(χ2=3.571,P=0.059).Conclusion Human plague in Inner Mongolia has a wide range of transmission and a high case fatality rate,mainly occures in the S.dauricus plague foci and M.unguiculatus plague foci.In the prevention and control of plague in Inner Mongolia,should strengthen innovative research,monitoring and early warning,and timely disposal and control of animal plague to avoid human infection.
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