An analysis of plague surveillance results in Ordos,Inner Mongolia Autonomous Region,2014-2022
Objective To investigate the number and distribution of main plague host populations for timely prediction of animal plague based on plague surveillance data,so as to provide a scientific basis for developing and implementing prevention and control measures against the occurrence of human plague.Methods The plague surveillance data of Ordos,Inner Mongolia Autonomous Region,China from 2014 to 2022 were collected,in which the data of Otog Front Banner(a national surveillance point)were systematically monitored in accordance with the National Plague Surveillance Program for Key Places,and the other surveillance points implemented the Inner Mongolia Plague Surveillance Program to monitor the main hosts,vector quantity,population density,etiology,and serology.The surveillance data were analyzed with the use of SPSS 25.0,and the rates were compared using the Chi-square test.Results A total of 7 721 rodents were captured,including 7 623 Meriones unguiculatus rodents(density ranging from 2.21 to 7.31 inds/hm2).The Meriones unguiculatus density of the key surveillance area and the general surveillance areas were 5.14 and 3.66 inds/hm2.The rodent body flea infestation rate was 33.49%,and the rate of flea infestation differed significantly between the key surveillance area(35.14%)and the general surveillance areas(32.73%)(χ2=8.512,P=0.004).The average booly flea index was 0.96.The dominant flea species were Xenopsylla conformis conformis and Nosopsyllus laeviceps kuzenkovi.A total of 43 strains of Yersinia pestis were seperated,serology tested positive for 3 samples,and PCR tested positive for 4 nucleic acid samples.Conclusions Animal plague was active at the natural plague foci of Ordos,Inner Mongolia during 2014 to 2022,with a high risk of spread to humans.Efforts should be made to strengthen plague surveillance,enhance health education for the public,improve the capabilities of primary medical professionals,and ensure timely emergency capability,to avoid the occurrence of human plague and long-distance transmission of plague.
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万方数据
