An investigation of a dengue outbreak in a rural area in Hangzhou, Zhejiang province, China, 2018
SUN Zhou1, CHEN Jun-fang1, ZHU Jun-wei2, KAO Qing-jun1, HUANG Ren-jie1, WANG Hao-qiu1
1 Hangzhou Center for Disease Control and Prevention, Hangzhou 310021, Zhejiang Province, China; 2 Yuhang District Center for Disease Control and Prevention
Abstract:Objective To investigate a dengue outbreak in a rural area in Hangzhou, Zhejiang province, China, and to provide a scientific basis for dengue control and prevention in rural areas. Methods The descriptive epidemiological method was used to analyze the epidemiological characteristics of the dengue outbreak in rural Hangzhou in September 2018. The serum samples from the dengue patients were collected to detect viral nucleic acids and antibodies, and the viral nucleic acids were extracted for E gene amplification and sequencing to construct a phylogenetic tree. The density of mosquitoes was monitored by the Breteau index. Results There were 13 local cases of dengue reported, and the attack rate was 0.13%. The patients were aged 30 to 79 years, mainly over 50 years. Most of them were farmers. Five virus isolates were identified as dengue virus type I by sequence analysis, highly homologous to the type 1 dengue viruses from Southeast Asian countries including Thailand and Myanmar. Conclusion Type 1 dengue virus is responsible for this local outbreak of dengue in rural Hangzhou, and possibly comes from Southeast Asian countries. Relevant authorities should further strengthen monitoring of imported dengue cases.
孙昼, 陈珺芳, 竹军伟, 考庆君, 黄仁杰, 汪皓秋. 杭州市2018年一起农村登革热暴发疫情调查研究[J]. 中国媒介生物学及控制杂志, 2020, 31(4): 465-468.
SUN Zhou, CHEN Jun-fang, ZHU Jun-wei, KAO Qing-jun, HUANG Ren-jie, WANG Hao-qiu. An investigation of a dengue outbreak in a rural area in Hangzhou, Zhejiang province, China, 2018. Chines Journal of Vector Biology and Control, 2020, 31(4): 465-468.
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