Abstract
Epidemiological characteristics of domestic imported dengue fever in mainland China, 2014–2018, including time-series, spatial mobility and crowd features, were analyzed. There existed seasonal characteristics from August to November. The 872 domestic imported cases from 8 provinces, located in the southeastern, southwestern and southern coastal or border areas, were imported to 267 counties in 20 provinces of mainland China, located in the outer areas along the southwest-northeast line. The 628 domestic imported cases were still imported to the adjacent counties in the provinces themselves, 234 domestic imported cases were imported to 12 other provinces except the 8 original exported provinces, 493 cases in 2014 reached the peak, and 816 domestic imported cases were from Guangdong (675) and Yunnan (141). Domestic imported cases from Guangdong were imported to 218 counties, and 475 cases from Guangdong were imported to the adjacent counties in Guangdong itself. There were more male cases than female cases except in 2016. Domestic imported cases were clustered from 21 to 50 years old. The top three cases were from farmer, worker and housework or unemployed. The findings are helpful to formulate targeted, strategic plans and implement effective public health prevention and control measures.
Highlights
Dengue fever, one of the most prevalent mosquito-borne diseases in humans, is mainly transmitted by Aedes aegyptiand and Aedes albopictus [1]
Dengue fever has evolved from a sporadic disease to a major public health problem as increasing geographical extension, numbers of cases, and disease severity [3]
A dengue fever outbreak occurred in Guangdong, 2014 [5,18]
Summary
One of the most prevalent mosquito-borne diseases in humans, is mainly transmitted by Aedes aegyptiand and Aedes albopictus [1]. There are four distinct serotypes for dengue virus, namely. Dengue fever is endemic in more than 100 countries of Southeast Asia, Africa, Americas, Western Pacific and Eastern Mediterranean regions [3]. Dengue fever has evolved from a sporadic disease to a major public health problem as increasing geographical extension, numbers of cases, and disease severity [3]. It is estimated that 390 million people had dengue virus infections with million cases annually worldwide [1]. A total of 655,324 cases and 610 deaths were reported in mainland China from 1978 to 2008. A total of 52,749 cases and six deaths were notified from 2009 to 2014 [4].
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