| Objective : With the rapid development of international tourism and trade,the epidemic situation of dengue fever in Laos was becoming more and more serious,especially in the southern part of Laos.This study was conducted the epidemiological characteristics and affect factors of Dengue Fever in Attapeu province of the southern Laos from 2020 to 2021.Methods: One field site was chosen from the east,west,south,north and central areas of Attapeu province,sourthen of Laos,respectively,where adult mosquitoes were collected by human landing collection and all mosquitoes collecting in human house and animal stables,and Aedes mosquito larvae were collected from containers of indoor and outdoor in above 5 survey sites.By the morphological identification for all adult mosquitoes or 4th instars-larvae,the species composition of dengue vectors were investigated,as well as their important ecological habits;the seasonal fluctuation of local DF case was investigated by the 5 surveillances of suspected dengue cases in the hospitals;above data were analyzed by using Excel 2013 and SPSS 24.0 software.The knowledge,attitude and vector control pattern of DF prevention and control were investigated by random sampling method in the above-mentioned investigation sites,the data were enrolled into Microsoft Excel and the chi-square test,the correlation between the data and the factors of DF infection was analyzed,it was considered that the factors analyzed were different between case group and non-case group as p value low at 0.05.Results: 17 species of mosquitoes were collected from 5 genera in 2 subfamilies,of those Aedes aegypti and Aedes albopictus were accounted for 1.72% and 2.22%respectively,the peaks of activity of Ae.aegypti was occurred at 09:00 am and 18:00pm,and the peak of activity of Ae.albopictus was occurred at 18:00 pm;Aedes mosquito larvae were breed in all year,of those the peaks of Breteau Index(BI),House index(HI)and Container index(CI)were higher between August and September with their 15.68,14.86.6.39 on August,and 15.63,15.41 and 6.67 in September,respectively.For whether infected DENV or not,there was no difference in sex and education level and occupation(P > 0.05),but there was significant difference in the juvenile group and age group from 36 to 59 years old(P <0.05),there was a significant difference between the cognitive symptoms such as fever and hemorrhage(P < 0.05),and there was a significant difference between the prevention and control information of DF obtained from TV and other information sources(P < 0.05),there was a significant difference in actively covering the water containers with lids,no storing water and cleanning up the vegetation around the house for mosquito larvae control methods(P<0.05).Conclusion: Ae.aegypti and Ae.albopictus,the vectors of dengue fever,were widely distributed in Attapeu Province,with high the population densities,as well as dengue cases.Above results showed that the risk of dengue fever outbreak was high,and poor of local residents’ knowledge of dengue prevention and their self-protection,suggesting the relevant departments should strengthen dengue surveillance and education of dengue knowledge. |
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