A study on the aedes lavae resource in 210 households in §èng §a district, Hµ Néi during 2-8/2001 showed that there were both two species of aedes aegypti (50.3%) and aedes albopictus (49.7%). 10 tools of water containment such as pool, can well, jar had lavae of aedes, vector of the dengue fever/ hemorrhagic dengue fever. The rate of population who had knowledge of dengue fever/ hemorrhagic dengue fever was high. However, the knowledge which disease transmission vector and proper measures for disease prevention a control was remaining limited. It should strengthen the education and communication.
Dengue ; prevention & control

Several methods for active the community role in dengue fever/dengue hemorrhagic fever control and prevention were implemented in 3 communes of Nam Hµ province from 1998 to 2000. These methods included health education to improve the knowledge of local people on this disease, eliminating discarded containers and introducing predacious Mesocyclops to large-size water containers. Results from the fields showed that the vector indices were reduced significantly compared with that in other untreated communes. No dengue epidemic circulated in the interventional communes. Using Mesocyclops for dengue control was accepted easily by local people. Mesocyclops can recycle and develop one released in water containers. Its population can remain from 70% to 90% after releasing
Dengue ; prevention & control

The method of community participation was implemented at three communes of Nam Dinh province since 1998. Results from the fields show that vector indices were reduced significantly compared with that in the untreated commune. No dengue epidemic circulated at these communes. Using mesocyclops for dengue vector control was accepted easily by local people. Mesocyclops can recycle and develop once released in water containers. Its population can remain from 70% to 90% after introduced into resource containers
Dengue ; prevention & control

KAP survey was conducted with 900 householders at three communes being endemic of dengue fever of Nam Dinh province before and after implementing dengue control measures. The results indicated community's knowledge on dengue was increased clearly, from 81.4% to 97.6% of households knew the transmission way of the disease. 83.4% of them know how to use mesocyclops for dengue vector control after carrying out the education and community mobilization. The collaborator network played a very important role in bringing information, improving knowledge, encouraging community participation to villagers, and supporting the active control measure and using mesocyclops for Aedes egypti larvae vector control
Dengue ; prevention & control

The analysis of the results of supervising the epidemies of Dengue fever/Dengue hemorrhagic fever in 2637 communes/wards of 175 rural/urban districts of 18 provinces/cities in the North in the year 2003 was evaluated. Among 1874 cases of Dengue fever/Dengue hemorrhagic fever 35%. Patients had been concentrated in Hanoi, Nghe An, Hai Phong and Ha Tinh. There was no death of Dengue fever and Dengue hemorrhagic fever. The main cause was Dengue of type 2. The vector was highly sensitive with insecticides. The wiping out of larves was developed synchronously, it decreased the vectors population by a half time.
Dengue/prevention & control ; Epidemiology ; Insecticides

In the year 2002, an interview was conducted on 180 households, where women account for 67,2%, men 32,8%, mean age is 47 years old. Among the interviewers, 100% had known of the disease; 88,3% had known of the symptoms, 95% had known of the transmission route, 94% had thougth that the disease could be prevented, 60,9% had believed in health authorities in behaving as them, 51,5% had complied with health workers, 60,9% had believed in radio and TV. There was a relation of statistic significance between the knowledge and the practice of use of chemical mosquito killers, mosquito net, mosquito killing fish, the storage of water at home ,as well as the environment sanitation. In high educated people, knowledge and practice of prevent of hemorrhagic dengue/dengue fever were better than in low educated ones
Knowledge ; Dengue/prevention & control ; Epidemiology

Dengue fever is a mosquito-borne disease that occurs in tropical and sub-tropical areas of the world. A severe form of dengue fever, also called dengue haemorrhagic fever, can cause severe bleeding, a sudden drop in blood pressure (shock) and death. The incidence of dengue fever has grown dramatically around the world in recent decades. The purpose of this study was to determine factors affecting prevention practices for dengue fever within the community. A cross-sectional study was conducted in the the municipality of Banda Aceh and district of Aceh Besar, Aceh Province, Indonesia. The sample size was 203, and the study instrument was a questionnaire. The study results showed that female respondents, 71 (75,5%) seem to have practiced prevention of dengue fever more as compared to the males (58,7%) or 64 respondents. Respondents in early adulthood (75 people or 54.7%) practiced more dengue prevention than older respondents. Meanwhile, respondents with higher levels of education, 85 (87.6%) practiced more dengue prevention than respondents with a middle level of education (47.2%) or 50 respondents. Respondents with good knowledge about dengue fever 128 (74%) practiced more prevention of dengue fever than respondent with a poor knowledge (23.3%) or 7 respondents. Respondents who had a positive attitude to the prevention of dengue fever, 108 (85.7%) practiced much more prevention than respondents who had a negative attitude (33.3%) or 25 respondents. Factors most affecting prevention practices for dengue fever were knowledge, attitude, education level, age and gender. Health promotion related to prevention of dengue fever should be done more in the media, especially using televison.
factors affecting ; prevention practices ; dengue fever

Dengue ; prevention & control ; Disease Reservoirs ; Humans ; Risk Assessment ; Singapore

Dengue virus (DENV) is a re-emerging disease transmitted by the Aedes mosquitoes and has become a major public health problem in southern China. Currently, no antiviral drug or effective vaccine exist to control this disease. The chimeric DENV structural protein vaccine cannot elicit balanced levels of protective immunity to each of the four viral serotypes; therefore, non-structural protein components may be required to construct an effective DENV vaccine. The Dengue virus non-structural 1 (DENV NS1) protein plays a critical role in viral pathogenesis and protective immunity. Therefore, immunity to Dengue 1-4 NS1 subtypes may be crucial for the prevention of severe disease. This review attempts to provide an overview about the structure and function of DENV NS1.
Animals ; Dengue ; immunology ; prevention & control ; virology ; Dengue Vaccines ; chemistry ; genetics ; immunology ; Dengue Virus ; chemistry ; genetics ; immunology ; Humans ; Viral Nonstructural Proteins ; chemistry ; genetics ; immunology

OBJECTIVETo explore the spatial distribution character of dengue fever and the change of Aedes' population, so as to provide macroscopical decision-making evidences of prevention and supervision on dengue fever.

METHODS(1) Collecting data on morbidity of dengue and supervision on vector's population in the corresponding period. (2) Drawing digitized map of Chaozhou in scale of 1:50,000, including elements of boundary, residential areas, road and traffic, altitude, water systems etc. (3) Measuring the latitude and longitude of center position of surveillance safes on the scene. (4) Processing spatial analysis by the ArcGIS 8.5 software.

RESULTSDistribution of Aedes showed spatial cluster in Chaozhou, while its density was related to the distance to the watersides. The closer to the watersides, the higher the density was. Map on spatial distribution showed that although the Aedes epidemic situation changed yearly, but primarily be kept in high, middle, low regions. Cross-validation effects of the distribution maps were satisfactory.

CONCLUSIONGeographic information system was promising in analyzing data on dengue fever, and better than other routine research methods.

Aedes ; Animals ; China ; Dengue ; prevention & control ; Dengue Virus ; Ecology ; Geographic Information Systems ; standards ; statistics & numerical data ; Geography ; Insect Vectors ; virology