A5081879410- Mosquito-borne diseases and control
- Dengue and Mosquito Control Research
- Malaria Research and Control
- Viral Infections and Vectors
- Research studies in Vietnam
- Insect Pest Control Strategies
- Vector-borne infectious diseases
- Insect symbiosis and bacterial influences
- Zoonotic diseases and public health
- COVID-19 epidemiological studies
- Insect and Pesticide Research
- HIV, Drug Use, Sexual Risk
- Vietnamese History and Culture Studies
- Data-Driven Disease Surveillance
- Vector-Borne Animal Diseases
- Vibrio bacteria research studies
- Viral gastroenteritis research and epidemiology
- Neonatal and Maternal Infections
- Animal Virus Infections Studies
- Leptospirosis research and findings
- Essential Oils and Antimicrobial Activity
- African Studies and Ethnography
- Plant and Fungal Species Descriptions
- Data Analysis with R
- Study of Mite Species
National Institute Of Hygiene And Epidemiology
2008-2024
Ministry of Health
2005-2023
Hanoi School Of Public Health
2016
General Department of Preventive Medicine
2005-2009
Nagasaki University
2008
To test the non-inferiority hypothesis that a vector control approach targeting only most productive water container types gives same or greater reduction of population as non-targeted in different ecological settings and to analyse whether targeted intervention is less costly.Cluster randomized trial eight study sites (Venezuela, Mexico, Peru, Kenya, Thailand, Myanmar, Vietnam, Philippines), with each area divided into 18-20 clusters (sectors neighbourhoods) approximately 50-100 households...
Dengue is expanding globally, but how dengue emergence shaped locally by interactions between climatic and socio-environmental factors not well understood. Here, we investigate the drivers of incidence in Vietnam, through analysing 23 years district-level case data spanning a period significant socioeconomic change (1998-2020). We show that urban infrastructure (sanitation, water supply, long-term growth) predict local spatial patterns incidence, while human mobility more influential driver...
This study analyses the evolutionary relatedness of 16 Japanese encephalitis virus (JEV) isolates (nine from Vietnam and seven Japan) to previously published JEV strains using E gene sequence data. Vietnamese isolated between 1986 1990 were found cluster in genotype 3. However, more recent 1995 2002 grouped within 1, now a dominant though unreported Vietnam. In addition, this study, closely related those 1990s than older 1 strains. Recently, introduction into Japan Korea has also been...
We describe remarkable success in controlling dengue vectors, Aedes aegypti (L.) and albopictus (Skuse), 6 communes with 11,675 households 49,647 people the northern provinces of Haiphong, Hung Yen, Nam Dinh Vietnam. The were selected for high-frequency use large outdoor concrete tanks wells. These found to be source 49.6-98.4% Ae. larvae, which amenable treatment local Mesocyclops, mainly M. woutersi Van der Velde, aspericornis (Daday) thermocyclopoides Harada. Knowledge, attitude, practice...
In Vietnam, dengue fever (DF) is still a leading cause of hospitalization. The main objective this study was to evaluate the seasonality and association with climate factors (temperature precipitation) on incidences DF in four provinces where highest incidence rates were observed from 1994 2013 Vietnam.Incidence (per 100,000) calculated monthly basis during period. seasonal-decomposition procedure based loess (STL) used order assess trend DF. addition, seasonal cycle subseries (SCS) plot...
With enough advanced notice, dengue outbreaks can be mitigated. As a climate-sensitive disease, environmental conditions and past patterns of used to make predictions about future outbreak risk. These improve public health planning decision-making ultimately reduce the burden disease. Past approaches forecasting have seasonal climate forecasts, but predictive ability system using different lead times in year-round prediction has been seldom explored. Moreover, transition from theoretical...
<ns4:p><ns4:bold>Background: </ns4:bold>The <ns4:italic>w</ns4:italic>Mel strain of <ns4:italic>Wolbachia</ns4:italic> has been successfully introduced into <ns4:italic>Aedes aegypti</ns4:italic> mosquitoes and subsequently shown to reduce transmission dengue other pathogens, under both laboratory field conditions. Here we describe the entomological outcomes mosquito releases in two small communities Nha Trang City central Vietnam.</ns4:p><ns4:p> <ns4:bold>Methods: <ns4:italic>Wolbachia...
This paper describes the process of expanding a successful dengue control program in 3 provinces northern Vietnam into national one and demonstrates presence rich, low-cost resource that could have similar applicability to other countries region. The cornerstone preventive strategy is larval Aedes aegypti (L.), major vector, using predators such as copepods, Mesocyclops spp., aided by corixid bug Micronecta quadristrigata Bredd, fish large water storage containers. From 1989 1998, 9 species...
A life-shortening strain of the obligate intracellular bacteria Wolbachia, called wMelPop, is seen as a promising new tool for control Aedes aegypti. However, developing vector strategy based on release mosquitoes transinfected with wMelPop requires detailed knowledge demographics target population.In Tri Nguyen village (611 households) Hon Mieu Island in central Vietnam, we conducted nine quantitative entomologic surveys over 14 months to determine if Ae. aegypti populations were spatially...
Background An estimated 2.4 billion people live in areas at risk of dengue transmission, therefore the factors determining establishment endemic where transmission suitability is marginal considerable importance. Hanoi, Vietnam such an area, and following a large outbreak 2009, we set out to determine if emerging Hanoi. Methods Principal Findings We undertook temporal spatial analysis 25,983 cases notified Hanoi between 1998 2009. Age standardized incidence rates, age infection, Standardized...
We previously reported a new community-based mosquito control strategy that resulted in elimination of Aedes aegypti (Linn.) 40 46 communes northern and central Vietnam, with annual recurrent total costs (direct indirect) only $0.28–$0.89 international dollars per person. This was extended to four provinces southern Vietnam Long An Hau Giang (2004–2007) An, Ben Tre, Vinh (2005–2010). In 14 124,743 residents, the mean ± SD adult female Ae. reduced from 0.93 0.62 0.06 0.09, reduction immature...
In response to an identified paucity of information on the size and composition immature Aedes aegypti (L.) (Diptera: Culicidae) populations in large field containers, we assessed net sampling pumping/sieving methods for estimating enumerating third (III)/fourth (IV) instar pupal populations. Sweep detection thresholds (number above which > or = 90% chance a positive sample) were < 28 immatures seven different container types (115-3000 liter jars tanks) laboratory, mean recovery percentages...
Journal Article Genetic Structure of Aedes aegypti in Australia and Vietnam Revealed by Microsatellite Exon Primed Intron Crossing Markers Suggests Feasibility Local Control Options Get access N. M. Endersby, Endersby 1Centre for Environmental Stress Adaptation Research, Department Genetics, The University Melbourne, Victoria 3010, Australia. Search other works this author on: Oxford Academic PubMed Google Scholar A. Hoffmann, Hoffmann V. L. White, White S. Lowenstein, Lowenstein Ritchie,...
We previously reported a new community-based mosquito control that resulted in the elimination of Aedes aegypti 40 46 communes northern and central Vietnam. During 2007 2008, we revisited Nam Dinh Khanh Hoa provinces Vietnam, respectively, to evaluate whether or not these programs were still being maintained 7 years 4.5 after formal project activities had ceased, respectively. Using published sustainability framework, compared 13 criteria from Tho Nghiep commune where local community adopted...
Since 2000, the Government of Viet Nam has committed to provide rural communities with increased access safe water through a variety household supply schemes (wells, ferrocement tanks and jars) piped schemes. One possible, unintended consequence these is concomitant increase in containers that may serve as habitats for dengue mosquito immatures, principally Aedes aegypti. To assess possible impacts we undertook detailed surveys Ae. aegypti storage various socioeconomic factors three communes...
<ns3:p><ns3:bold>Background: </ns3:bold>The <ns3:italic>w</ns3:italic>Mel strain of <ns3:italic>Wolbachia</ns3:italic> has been successfully introduced into <ns3:italic>Aedes aegypti</ns3:italic> mosquitoes and subsequently shown to reduce transmission dengue other pathogens, under both laboratory field conditions. Here we describe the entomological outcomes mosquito releases in two small communities Nha Trang City central Vietnam.</ns3:p><ns3:p> <ns3:bold>Methods: <ns3:italic>Wolbachia...
A One Health cross-sectoral surveillance approach was implemented to screen biological samples from bats, pigs, and humans at high-risk interfaces for zoonotic viral spillover five families with potential in Viet Nam. Over 1600 animal human bat guano harvesting sites, natural roosts, pig farming operations were tested coronaviruses (CoVs), paramyxoviruses, influenza viruses, filoviruses flaviviruses using consensus PCR assays. Human also immunoassays detect antibodies against eight virus...
We isolated and characterized a Banna virus from mosquitoes in Vietnam; 5 strains were field-caught at various locations; was previously encephalitis patients Yunnan, China, 1987. Together, these findings suggest widespread distribution of this throughout Southeast Asia.
Dengue fever is the most widespread infectious disease of humans transmitted by Aedes mosquitoes. It leading cause hospitalization and death in children Southeast Asia western Pacific regions. We analyzed surveillance records from health centers Vietnam collected between 2001-2012 to determine seasonal trends, develop risk maps an incidence forecasting model.The data were using a hierarchical spatial Bayesian model that approximates its posterior parameter distributions integrated Laplace...
A field study was conducted in a village northern Vietnam to investigate how host distribution influences Japanese encephalitis (JE) vector abundance. Indoor and outdoor collections were from 50 compounds. We collected three JE species--Culex tritaeniorhynchus Culex vishnui that comprised the group, gelidus. Spatial autocorrelation not observed mosquito assemblies at any scale larger than house Multivariate analyses revealed Cx. gelidus density correlated positively with both proximity...
In response to an identified paucity of information on the size and composition immature Aedes aegypti (L.) (Diptera: Culicidae) populations in large field containers, we assessed net sampling pumping/sieving methods for estimating enumerating third (III)/fourth (IV) instar pupal populations. Sweep detection thresholds (number above which ≥90% chance a positive sample) were ≤28 immatures seven different container types (115–3000 liter jars tanks) laboratory, mean recovery percentages varied...
Abstract Background The complexity of mosquito-borne diseases poses a major challenge to global health efforts mitigate their impact on people residing in sub-tropical and tropical regions, travellers deployed military personnel. To supplement drug- vaccine-based disease control programmes, other strategies are urgently needed, including the direct vectors. Modern vector research generally focuses identifying novel active ingredients and/or innovative methods reduce human-mosquito...
"<strong>Background:</strong> Currently, dengue fever/dengue hemorrhagic fever (DF/DHF) is an important public health challenge in many areas, including the Ba Tri District, Ben Tre Province, Vietnam. <strong>Methods and Aim:</strong> This study was conducted 2015 using a retrospective secondary data analysis on monthly of DF/DHF cases climate conditions from 2004–2014 which aimed to explore relationship between variables. <strong>Results:</strong> During period 2004–2014, there were...
Author(s): Christofferson, Rebecca C; Parker, Daniel M; Overgaard, Hans J; Hii, Jeffrey; Devine, Gregor; Wilcox, Bruce A; Nam, Vu Sinh; Abubakar, Sazaly; Boyer, Sebastien; Boonnak, Kobporn; Whitehead, Stephen S; Huy, Rekol; Rithea, Leang; Sochantha, Tho; Wellems, Thomas E; Valenzuela, Jesus G; Manning, Jessica E