Evaluation of the risk of imported dengue fever and local spreading through mosquito vectors in Nanjing in 2024
Objective To understand the risk of imported dengue fever cases and local mosquito-borne transmission in Nanjing in 2024,so as to scientifically develop prevention and control strategies and measures for local transmission of dengue fever,guide emergency preparedness,and deploy prevention and control work in advance.Methods Descriptive epidemiological methods were used to analyze the dengue fever cases and mosquito prevalence in Nanjing from 2018 to 2023.Results The peak period of dengue fever incidence in Nanjing was June to Novermber.In 2019,2020,2021,and 2023,the hightest Breteau index(BI)were all in July,while in 2018 and 2022,the highest BI values were in August and June,respectively.The highest adult mosquito density in 2018,2019,2021,and 2022 were in September,while the highest adult mosquito density in 2020 and 2023 were in July.The highest adult mosquito density was observed in waste tire stacking sites in 2018,and in residential areas from 2019 to 2023.When the emergency monitoring was activated,the BI and adult mosquito density exceeded the standard.After emergency control of the imported dengue fever,the mosquito vector density decreased and the monitoring indicators tended to stabilize.The risk of local transmission was assessed as"medium".Conclusion In 2024,the risk of imported dengue fever in Nanjing is relatively high,and the risk of local transmission is moderate.The period from June to Novermber is the peak period for local transmission and prevalence of dengue fever in Nanjing.Especially,mosquito control in residential areas should be strengthened,and standardizing the use of insecticides for dengue fever emergency response.Establishing a dynamic grading warning system and cooperation mechanism is extremely important to control the spread of the import and local epidemic dengue fever.
万方数据
维普
