Objective To conduct mosquito density surveillance in the first-and second-level areas of the Shaoxing Competition Zone of the Hangzhou Asian Games in China,so as to accumulate experience for mosquito vector control during major events.Methods From July 31 to October 8,2023 during the Hangzhou Asian Games,mosquito density was monitored weekly in the first-and second-level areas of 10 related venues in the Shaoxing Competition Zone.The monitored indicators were the route index and the Breteau index(BI).Excel 2016 and SPSS 28.0 softwares were used for data entry and aggregation and statistical analysis.The route index of the first-level areas was described.The correlation between BI and time in the second-level areas was determined using Spearman correlation analysis.The Wilcoxon rank sum test was used for comparison between provincial and non-provincial surveillance points.Results By administrative region,the route index of the first-level areas in Yuecheng and Keqiao districts decreased to 0 at weeks 3 and 5,respectively,reaching level-A control.By venue classification,the route index of the first-level areas of competition venues,designated hospitals,and designated hotels decreased to 0 at weeks 3,3,and 5,respectively,reaching level-A control.The BI of the second-level areas of Yuecheng District and Keqiao District showed a downward trend(Yuecheng:rs=-0.924,P<0.001;Keqiao:rs=-0.988,P<0.001).In general,the BI of the second-level areas of Asian Games-related venues showed a downward trend(rs=-0.988,P<0.001),the change in BI over time was significant for competition venues(rs=-0.988,P<0.001)and designated hotels(rs=-0.994,P<0.001),but not significant for designated hospitals(rs=-0.579,P=0.080).There was no significant difference between provincial and non-provincial surveillance points(Z=-0.454,P=0.650).Conclusion Through weekly surveillance of mosquito density,addressing feedback issues,and supervising the implementation of rectification measures,during the Hangzhou Asian Games,mosquito density in the Shaoxing Competition Zone was generally controlled within the standard limits,which ensured the health of personnel and the smooth flow of the event.
Asian GamesMosquito surveillancePrevention and control
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