Analysis of the impact of quarantine management measures for inbound passengers on dengue fever in Hangzhou,Zhejiang Province,China,from 2020 to 2022
Objective To investigate the impact of quarantine management measures for inbound passengers on dengue fever during the prevention and control of novel coronavirus infection in Hangzhou,China.Methods The information on dengue fever cases from January 1,2017 to December 31,2022 and the mosquito surveillance data and the number of inbound passengers from 2017 to 2022 in Hangzhou were collected.Excel 2019 software was used to aggregate the data,and R 4.2.0 software was used for statistical analysis.The epidemiological characteristics of dengue fever before and after the implementation of quarantine management measures were compared using the Chi-squared test.The mosquito density surveillance data were compared using repeated-measures analysis of variance.The correlation between the number of inbound passengers and dengue fever cases was investigated using Spearman rank correlation analysis.Results After the implementation of quarantine management measures for inbound passengers from March 26,2020 to December 31,2022,a total of 5 imported cases of dengue fever were reported in Hangzhou,and the intensity of the risk of imported transmission was 0,which were significantly lower than those(250 cases,with 4.82 of risk intensity)before the implementation.There were no significant differences in the population characteristics,the season of importation,and the distribution of the source areas of imported dengue fever cases before and after the implementation of quarantine management measures(all P>0.05).After the implementation of quarantine management measures,four imported cases were found at isolation sites and one at a port,while 98.40%(246/250)of cases were found in hospitals before the implementation of quarantine management measures.The time interval between disease onset and diagnosis was significantly shorter than before the implementation of quarantine management measures(t=2.053,P=0.041).The mean monthly Breteau index and mean monthly net trap index of Aedes mosquitoes during 2017 to 2019 were not significantly different from those during 2020 to 2022(all P>0.05).The annual number of inbound passengers was positively correlated with the annual numbers of imported cases of dengue fever from 2017 to 2022(r=1.000,P=0.003).Conclusions The number of imported cases of dengue fever has decreased significantly after the implementation of quarantine management measures for inbound passengers in Hangzhou.However,there is still a risk of outbreak after lifting the management of inbound passengers.
Dengue feverImported caseQuarantine management measureVector densityRisk of local transmission
NETL
NSTL
万方数据
