Abstract
What is known about this topic? Dengue fever is an acute febrile illness caused by four types of dengue virus (DENV 1–4), and is a mosquito-borne infectious disease. The incidence of dengue has increased dramatically around the world in recent decades. An estimated of 3.9 billion people in 128 countries are at risk of infection with dengue viruses, 70% of whom are in Asia. In 2017, the first local infections of dengue virus (DENV-2) in Jiangxi Province was reported in Zhanggong District, Ganzhou City. What is added by this report? From August to September 2019, the first dengue outbreak happened in Xin’gan County, where 81 local dengue fever cases were reported, 35 were laboratory-confirmed cases, and 46 were clinically-diagnosed cases; all cases were dengue virus type 1. The DENV-virus strains isolated from the cases of Xin’gan County were close to the strains isolated in Singapore (MF033254|25657|Singapore|2016) and Henan (MK905537|Henan201903|China: Henan Province|2019). What are the implications for public health practice? The outbreak might have been caused by imported cases or covert infections. The outbreak in Xin’gan County indicated that more proactive countermeasures should be taken during the dengue epidemic period such as intensifying surveillance for dengue cases, virus serotype, and Aedes vector density and strengthening cooperation with customs and tourism departments. Moreover, the outbreak should prompt training in medical institutions and improved ability for doctor’s to diagnose dengue fever, which is very important for early detection of dengue cases and taking preventive measures.
Highlights
The two cases were identified as dengue virus infections cases on August 29 and prompted the deployment of a team composed of an epidemiologist and a vector control specialist to Xin’gan County to provide health support, to investigate the infection source, to assess the effects of mosquito control, and especially to assess the risk of regional transmission
All cases presenting dengue fever-like symptoms were tested with a dengue rapid diagnostic test (RDT) for DENV nonstructural protein 1 (NS1)
From August 29 to September 10, 2019, a total of 510 samples were tested for evidence of DENV infection, 81 (15.9%) of whom tested positive for dengue
Summary
Fuqiang Yang1,&; Guanghui Xia1,&; Zhili Zeng; Zhongjian Li1; Huijian Cheng; Daping Che; Jun Zong; Jianxiong Li1; Tian Gong; Guihua Liu; Weidong Zhou; Bihai Wei; Xiaobo Liu; Jiandong Li5; Sheng Ding1,#. In 2017, the first local infections of dengue virus (DENV-2) in Jiangxi Province was reported in Zhanggong District, Ganzhou City. From August to September 2019, the first dengue outbreak happened in Xin’gan County, where 81 local dengue fever cases were reported, 35 were laboratoryconfirmed cases, and 46 were clinically-diagnosed cases; all cases were dengue virus type 1. On August 28, 2019, Jiangxi Province Center for Disease Control and Prevention (Jiangxi CDC) received a report of a suspected dengue case from Xin’. The two cases were identified as dengue virus infections cases on August 29 and prompted the deployment of a team composed of an epidemiologist and a vector control specialist to Xin’gan County to provide health support, to investigate the infection source, to assess the effects of mosquito control, and especially to assess the risk of regional transmission
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