Comparison of the surveillance data about Breteau index in two urban districts under the background of dengue fever outbreak
SHI Jian1, ZHOU Dong-mei2, QU Zhi-qiang1, LIU Hao-hui1, LIAO Ke-chang1, HUANG Chao-jun1, TANG Hong-yang1, JIANG Si-yang3, TANG Jin-fang1, HUANG Jia-yun1
1. Nanning Municipal Center for Disease Control and Prevention, Nanning, Guangxi 530023, China; 2. The Eighth People’s Hospital of Nanning, Nanning, Guangxi 530001, China; 3. Guangxi Medical University, Nanning, Guangxi 530021, China
Abstract：Objective To compare the surveillance data of Aedes vector in two urban districts by combining with the data of dengue fever outbreaks in Nanning City in 2019, and to provide references for improving local surveillance of Aedes mosquitoes. Methods We collected the data about cases from dengue fever outbreaks in 2019 and the surveillance data of Aedes vector based on Breteau index method in Jiangnan district which had the most cases of dengue fever and Xingning District which served as a national surveillance site of Aedes vector. Descriptive epidemiological methods were used to analyze the difference of the surveillance data of Aedes vector in the two districts. Results There were 370 cases of dengue fever reported in Jiangnan District, and the date of onset of the first case in 2019 was May 21. The dates when the number of cases reached 25%, 50%, 75% and 100% were September 27, October 6, October 15 and November 28, respectively. The daily maximum number of cases was 19. The number of cases reported in Xingning District was 56, and the date of onset of the first case in 2019 was September 14. The dates when the number of cases reached 25%, 50%, 75% and 100% were October 3, October 17, October 29 and November 12, respectively. The daily maximum number of cases was 4. Both the districts had their highest Breteau index in September. The monthly mean Breteau indexes in Jiangnan District were all < 5. Except for November, the monthly mean Breteau indexes in other months in Xingning District were all > 5. Breteau indexes by surveillance in waste stations (4.94) and residential areas (4.56) in Jiangnan District were the highest, while Breteau index by surveillance in hospitals (0.61) was the lowest. Breteau indexes by surveillance in flower and bird markets (15.11) and waste stations (11.69) in Xingning District were the highest, whereas Breteau indexes by surveillance in construction sites (0.22) and parks (0.28) were the lowest. In Jiangnan District, Breteau indexes in residential areas and schools in the emergency monitoring before vector control were significantly higher than those after mosquito control (9.98 vs. 2.89, 11.67 vs. 0.67). In Xingning District, Breteau index in residential areas in the emergency monitoring before vector control was significantly higher than that after mosquito control (11.57 vs. 2.16). Conclusion The surveillance data of Aedes vector in the two districts in 2019 basically reflected the temporal and logical relationship between the seasonal change of Aedes vector and dengue outbreaks. However, the surveillance datawere failure to play an early warning role for dengue outbreaks. It is necessary to continuously improve the quality of Aedes vector surveillance.
石健, 周冬梅, 屈志强, 刘昊晖, 廖克昌, 黄超俊, 汤洪洋, 姜斯阳, 唐金芳, 黄家运. 登革热疫情暴发背景下两个城区布雷图指数法监测数据比较[J]. 实用预防医学, 2023, 30(4): 420-423.
SHI Jian, ZHOU Dong-mei, QU Zhi-qiang, LIU Hao-hui, LIAO Ke-chang, HUANG Chao-jun, TANG Hong-yang, JIANG Si-yang, TANG Jin-fang, HUANG Jia-yun. Comparison of the surveillance data about Breteau index in two urban districts under the background of dengue fever outbreak. , 2023, 30(4): 420-423.
2023, Vol. 30 
