Background Overseas imported dengue fever is an important factor in local outbreaks of this disease in the mainland of China.To better prevent and control such local outbreaks,the epidemiological characteristics and t...Background Overseas imported dengue fever is an important factor in local outbreaks of this disease in the mainland of China.To better prevent and control such local outbreaks,the epidemiological characteristics and temporal-spatial distribution of overseas imported dengue fever cases in provincial-level administrative divisions(PLADs)where dengue fever is outbreak in the mainland of China were explored.Methods Using the Chinese National Notifiable Infectious Disease Reporting Information System(CNNDS),we identified overseas imported dengue fever cases in dengue fever outbreak areas in the mainland of China from 2005 to 2019 to draw the epidemic curve and population characteristic distribution of overseas imported cases in each PLAD.Based on spatial autocorrelation analysis of ArcGIS 10.5 and temporal-spatial scanning analysis of SaTScan 9.5,we analyzed the temporal-spatial distribution of overseas imported dengue fever in dengue fever outbreak areas in the mainland of China.Results A total of 11,407 imported cases,mainly from Southeast Asia,were recorded from 2005 to 2019 in these 13 PLADs.Of which 62.1%were imported into Yunnan and Guangdong Provinces.Among the imported cases,there were more males than females,mainly from the 21–50 age group.The hot spots were concentrated in parts of Yunnan,Guangdong and Fujian Provinces.We found the cluster of infected areas were expanding northward.Conclusions Based on the analysis of overseas imported dengue cases in 13 PLADs of the mainland of China from 2005 to 2019,we obtained the epidemiological characteristics and spatial distribution of imported dengue cases.Border controls need to pay attention to key population sectors,such as 21–50 years old men and education of key populations on dengue prevention.There is a need to improve the awareness of the prevention and control of imported cases in border areas.At the same time,northern regions cannot relax their vigilance.展开更多
This paper reported 5 Dengue Fever (DF) cases were found among the 9 international travellers, who went to Malaysia, Burma from Nantong. In order to obtain the essential conditions, provide the international traveller...This paper reported 5 Dengue Fever (DF) cases were found among the 9 international travellers, who went to Malaysia, Burma from Nantong. In order to obtain the essential conditions, provide the international travellers with knowledge and preventive measures of DF, All of 9 travellers were surveyed by individual interviewing and blood—sample were detected for antibody. According to some epidemiological data, the area where the travellers went was epidemic area of DF, the time they arrived just in epidemic period. The results of individual interviewing showed that during they stayed abroad, they were bited by mosquito and contacted with a person who was suffering from illness, which similar with cold and other symptoms. Combinating the duration of DF with the date of onset, it was inferred that the 5 cases were infected with DF virus in the Burma. The same symptoms and signs of the 5 cases were as follows : the sudden onset with high fever, shivering, intense pains in the joints and muscles, poor appetite, nausea, vomiting and scarlet fever type of rash. Antibody of Dengue—3 were detected in all of the 5 cases, the highest titer was 1 : 10,240, the lowest titer was 1 : 2,560. In view the result of this investigation, authors put forward the following suggestions: (1) enhance the international travellers’ personal preventive consiousness to DF (eg: using mosquito expellant, and applying mosquito net). (2) If the imported cases were found, the isolation should be applied immediately and disinseeting, mosquito control measures also need be applied. (3) As the incidence of DF increased drastically in the most parts of the tropics and subtropics worldwide, especially in present decade, a total cases of DF were more than the total cases of the passed 25 years (1956—1980), meanwhile, considering the insect vectors of DF existed in the some areas in China, the population is susceptible to the DF, the vigilance of occur of DF in China should be caused.展开更多
文摘Background Overseas imported dengue fever is an important factor in local outbreaks of this disease in the mainland of China.To better prevent and control such local outbreaks,the epidemiological characteristics and temporal-spatial distribution of overseas imported dengue fever cases in provincial-level administrative divisions(PLADs)where dengue fever is outbreak in the mainland of China were explored.Methods Using the Chinese National Notifiable Infectious Disease Reporting Information System(CNNDS),we identified overseas imported dengue fever cases in dengue fever outbreak areas in the mainland of China from 2005 to 2019 to draw the epidemic curve and population characteristic distribution of overseas imported cases in each PLAD.Based on spatial autocorrelation analysis of ArcGIS 10.5 and temporal-spatial scanning analysis of SaTScan 9.5,we analyzed the temporal-spatial distribution of overseas imported dengue fever in dengue fever outbreak areas in the mainland of China.Results A total of 11,407 imported cases,mainly from Southeast Asia,were recorded from 2005 to 2019 in these 13 PLADs.Of which 62.1%were imported into Yunnan and Guangdong Provinces.Among the imported cases,there were more males than females,mainly from the 21–50 age group.The hot spots were concentrated in parts of Yunnan,Guangdong and Fujian Provinces.We found the cluster of infected areas were expanding northward.Conclusions Based on the analysis of overseas imported dengue cases in 13 PLADs of the mainland of China from 2005 to 2019,we obtained the epidemiological characteristics and spatial distribution of imported dengue cases.Border controls need to pay attention to key population sectors,such as 21–50 years old men and education of key populations on dengue prevention.There is a need to improve the awareness of the prevention and control of imported cases in border areas.At the same time,northern regions cannot relax their vigilance.
文摘This paper reported 5 Dengue Fever (DF) cases were found among the 9 international travellers, who went to Malaysia, Burma from Nantong. In order to obtain the essential conditions, provide the international travellers with knowledge and preventive measures of DF, All of 9 travellers were surveyed by individual interviewing and blood—sample were detected for antibody. According to some epidemiological data, the area where the travellers went was epidemic area of DF, the time they arrived just in epidemic period. The results of individual interviewing showed that during they stayed abroad, they were bited by mosquito and contacted with a person who was suffering from illness, which similar with cold and other symptoms. Combinating the duration of DF with the date of onset, it was inferred that the 5 cases were infected with DF virus in the Burma. The same symptoms and signs of the 5 cases were as follows : the sudden onset with high fever, shivering, intense pains in the joints and muscles, poor appetite, nausea, vomiting and scarlet fever type of rash. Antibody of Dengue—3 were detected in all of the 5 cases, the highest titer was 1 : 10,240, the lowest titer was 1 : 2,560. In view the result of this investigation, authors put forward the following suggestions: (1) enhance the international travellers’ personal preventive consiousness to DF (eg: using mosquito expellant, and applying mosquito net). (2) If the imported cases were found, the isolation should be applied immediately and disinseeting, mosquito control measures also need be applied. (3) As the incidence of DF increased drastically in the most parts of the tropics and subtropics worldwide, especially in present decade, a total cases of DF were more than the total cases of the passed 25 years (1956—1980), meanwhile, considering the insect vectors of DF existed in the some areas in China, the population is susceptible to the DF, the vigilance of occur of DF in China should be caused.
