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Objective:To analyze the monitoring results of plague foci in Guizhou Province, to master the epidemic dynamics of the plague and to formulate the prevention and control measures.Methods:The plague monitoring data from 2018 to 2020 in Guizhou Province were collected from China Disease Prevention and Control Information System Plague Prevention and Control Information Management System to analyze the plague epidemic situation. The murine animals capture methods used were cage clip method, 5 m cage clip method and day-by-day rodent capture method. Bacterial culture and hemagglutination were used in laboratory.Results:A total of 2 273 murine animals were captured indoors with cage clip method, and the Rattus norvegicus was the dominant species, accounting for 47.29% (1 075/2 273), Rattus flavipectus and Mus musculus were common species, accounting for 43.55% (990/2 273) and 5.10% (116/2 273). A total of 1 460 murine animals were captured outdoors with 5 m cage clip method, and the Rattus rattus sladoni was the dominant species, accounting for 35.48% (518/1 460), Rattus flavipectus and Eothenomys miletus were common species, accounting for 16.03% (234/1 460) and 8.70% (127/1 460). A total of 5 742 murine animals (including 3 733 animals captured with cage clip method and 5 m cage clip method, 2 009 animals captured with day-by-day rodent capture method) were examined and 1 176 with flea, the flea infestation rate of murine animals was 20.48%, Xenopsylla cheopi was the dominant flea species [56.63% (3 020/5 333)] and the index was 0.53. Laboratory test results were all negative. Conclusions:The plague foci of Guizhou Province is at a quiescent stage, but the reignition cannot be ruled out. The monitoring of plague should be strengthened, the quality of the monitoring should be improved, and health education and publicity should be carried out to prevent the occurrence of human plague outbreaks.
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Objective To analyze the monitoring results on plague from 2013 to 2017 in Guizhou Province,to master the epidemic dynamics of the plague and to provide a basis for developing countermeasures.Methods Using a retrospective analysis method,plague monitoring data from 9 monitoring sites in Xingyi City,Anlong County,Ceheng County,Xingren County,Pan County,Liuzhi Special Zone,Si'nan County,Dejiang County and Yanhe County in Guizhou Province from 2013-2017 were collected and analyzed.Results In 2013-2017,there were no plague F1 antigen and F1 antibody.A total of 3 575 murine animals were captured indoors,with Rattus norvegicus as the dominant species,accounting for 49.99％ (1 787/3 575).Rattus norvegicus and Mus musculus were common species,accounting for 35.64％ (1 274/3 575) and 11.36％ (406/3 575),respectively;the density of indoor rat was 3.48％(3 575/102 641),there was no significant difference in rat density between different years (x2 =3.655,P ＞ 0.05).A total of 1 674 murine animals were captured outdoors,and the Rattus norvegicus was the dominant species,accounting for 34.29％ (574/1 674).S.serrata and Rattus norvegicus were common species,accounting for 18.28％ (306/1 674) and 13.20％ (221/1 674),respectively;the density of outdoor rat was 1.67％ (1 674/100 180),there was no significant difference in rat density between different years (x2 =6.241,P ＞ 0.05).A total of 9 541 murine animals were examed and 2 270 rats with flea were detected,the flea infestation rate of rat was 23.79％,the rat body flea index was 1.019 4,Xenopsylla cheopi was the dominant flea species and the index was 0.557 3.Conclusions The plague natural focus of Guizhou is at a quiescent stage.The plague monitoring work should be strengthened,health education should be done well,and plague epidemics should be stricdy prevented.
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Objective To investigate the status of the plague natural focus and assess the risk of plague in regions with large scale engineering construction project,in order to provide a basis for plague prevention and control.Methods The survey was carried out in 14 regions with large scale engineering construction project of 40 counties in Guizhou Province in 2000-2011,2-3 towns were selected in each county and 2-3 villages in each town,the plague hosts and flea vectors in the residential houses and outdoors were investigated,the sera of 5 animals were collected in each village.The capture rate of hosts and flea index were calculated.Then the samples were cultured and serological tested for plague.Results The density of rodents was 1.14％-3.87％ in the reservoir region' residential building of hydro power station (Tianshengqiao,Pingban,Silin,Guangzhao,Sanbanxi,Dongqing,Qianzhong,Shatuo) and Xingyi airport,and Rattus flavipestus was the dominant species.The density of rodents was 0.00％-0.84％ in the reservoir region of hydro power station (Hongjiadu,Yingzidu,Goupitan,Longtan) and Jinyang district; the total flea index in Yinzidu,Pingban,Longtan reservoir regions of hydro power stations were 3.16,2.00,1.06,3.47 and 1.99,respectively.A total of 21 rodent and flea samples from Tianshengqiao hydro power station were tested positive for F1 antigen of the plague.Three strains of Yersiniapestis were isolated.Nine rat filter paper blood samples and 7 sera of indicative animals were tested plague F1 antibody positive.Other regions with large scale engineering construction project were tested negative.Conclusions The reservoir region of Tianshengqiao hydro power station is endemic areas of the plague,where belong to high risk areas.The density of Rattus flavipestus is higher than the controlling standard of the country in the reservoir region of hydro power station (Pingban,Silin,Guangzhao,Sanbanxi,Dongqing,Qianzhong,Shatuo),where belong to potential risk areas.The plague prevention and monitoring should be continually strengthened to reduce the risk of plague.
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Objective To master the prevalence of plague and its trend in Guizhou Province,and to analyze the plague monitoring results from 2000 to 2012.Methods The report of infectious disease,the information of plague natural focus and the epizootic monitoring data of Xingyi City,Anlong County and Dingxiao Distract of Guizhou Province from 2000 to 2012 were collected and the status of the plague natural focus was analyzed.Results There were 137 cases of gland plague in Xingyi City and Arlong county from 2000-2003,1 death,and mt plague occurred in 66 villages.Fifty-four strains of Yersiniapestis were detected and 49 rats were plague antigen F1 positive(49/160).No human plague occurred between 2004-2012.A total of 4 plague antigen F1 positive rats were detected in Dingxiao District and Xingyi City in 2005 and 2006.There was no Yersinia pestis and F1 antibody in 2007-2012.The epidemic stage of plague was from 2000-2003; the active stage was from 2004-2006; and the quiescent stage was from 2007-2012.The dominant species of the plague natural focus was Rattus flavipestus (42.83％,7 966/18 597),but was replaced by Rattus norvegicus at the epidemic stage (47.22％,1 480/3 134) and the active stage(35.35％,2 071/5 196).The density of rodents was 5.34％ at the epidemic stage,which was higher than that of the active stage (3.27％) and the quiescent stage (1.71％,x2 =2 286.15,P ＜ 0.01).Xenopsylla cheopis(56.34％,10 034/17 811) was the dominant species,and the index was 1.537 9,which was greater than those of the active stage(0.959 6) and the quiescent stage(0.540 4,x2 =492.68,P ＜ 0.01).Conclusions The plague of Guizhou Province is at the quiescent stage.Both the density of rodents and the Xenopsylla cheopis index are lower than the national standard of controlling.