Dengue-like illness surveillance: a two-year longitudinal survey in suburban and rural communities in the Lao People’s Democratic Republic and in Thailand

Vannavong, Nanthasane; Seidu, Razak; Stenström, Thor Axel; Dada, Nsa; Overgaard, Hans J.

doi:10.5365/wpsar.2017.8.4.001

Cited by 8 publications

(15 citation statements)

References 29 publications

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“…Based on the endemicity measure proposed in this study, Thailand, India, Cambodia, Vietnam, Indonesia, the Philippines, Brazil, the United States and Venezuela are classified as hyper‐endemic regions. Consistent with the current knowledge, Thailand is likely a dengue hyper‐endemic region with thousands of cases annually (Vannavong et al., 2019). Additionally, Brazil is generally considered to be a dengue hyper‐endemic country as proposed by previous studies (Gregianini et al., 2018; Nunes et al., 2019; Penna et al., 2009).…”

Section: Discussionsupporting

confidence: 80%

Assessment of the global circulation and endemicity of dengue

Long

Zhang

Cai

et al. 2021

Transbounding Emerging Dis

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Dengue is a significant public health issue, affecting hundreds of millions of people worldwide. As it is spreading from tropical and subtropical zones, some regions previously recognised as non‐endemic are at risk of becoming endemic. However, the global circulation of dengue is not fully understood and quantitative measurements of endemicity levels are lacking, posing an obstacle in the precise control of dengue spread. In this study, a sequence‐based pipeline was designed based on random sampling to study the transmission of dengue. The limited intercontinental transmission was identified, while regional circulation of dengue was quantified in terms of importation, local circulation and exportation. Additionally, hypo‐ and hyper‐endemic regions were identified using a new metric, with the former characterised by low local circulation and increased importation, whereas the latter by high local circulation and reduced importation. In this study, the global circulation pattern of dengue was examined and a sequence‐based endemicity measurement was proposed, which will be helpful for future surveillance and targeted control of dengue.

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Section: Discussionsupporting

confidence: 80%

Assessment of the global circulation and endemicity of dengue

Long

Zhang

Cai

et al. 2021

Transbounding Emerging Dis

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“…A nationwide passive surveillance system subject to inherent limitations is used to record dengue cases, severity, and demographics of detected cases. Both active and sentinel surveillances are rarely performed [ 3 , 11 ]. The 1997 World Health Organization (WHO) dengue case definition, which classifies dengue into three categories: DF, DHF, and DSS is extensively used in Thailand [ 3 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Epidemiology and costs of dengue in Thailand: A systematic literature review

et al. 2022

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Background Dengue is the fastest-spreading vector-borne viral disease worldwide. In Thailand, dengue is endemic and is associated with a high socioeconomic burden. A systematic literature review was conducted to assess and describe the epidemiological and economic burden of dengue in Thailand. Methods Epidemiological and economic studies published in English and Thai between 2011–2019 and 2009–2019, respectively, were searched in MEDLINE, Embase, and Evidence-Based Medicines reviews databases. Reports published by the National Ministry of Public Health (MoPH) and other grey literature sources were also reviewed. Identified studies were screened according to predefined inclusion and exclusion criteria. Extracted data were descriptively summarised and reported following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Results A total of 155 publications were included in the review (39 journal articles and 116 grey literature). Overall, dengue incidence varied yearly, with the highest rates per 100,000 population in 2013 (dengue fever (DF) 136.6, dengue haemorrhagic fever (DHF) 100.9, dengue shock syndrome (DSS) 3.58) and 2015 (DF 133.1, DHF 87.4, DSS 2.14). Peak incidence coincided with the monsoon season, and annual mortality was highest for DSS, particularly in the age group 15–24-year-olds. The highest dengue incidence rates were reported in children (10–14-year-olds) and young adults (15-24-year-olds), irrespective of dengue case definition. Economic and societal burdens are extensive, with the average cost per case ranging from USD 41 to USD 261, total cost per year estimated at USD 440.3 million, and an average of 7.6 workdays lost for DHF and 6.6 days for DF. Conclusions The epidemiological, economic, and societal burden of dengue in Thailand is high and underreported due to gaps in national surveillance data. The use of expansion factors (EFs) is recommended to understand the true incidence of dengue and cost-benefit of control measures. Furthermore, as dengue is often self-managed and underreported, lost school and workdays result in substantial underestimation of the true economic and societal burden of dengue. The implementation of integrated strategies, including vaccination, is critical to reduce the disease burden and may help alleviate health disparities and equity challenges posed by dengue.

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“…Most estimates used data collected in tropical regions of Southeast Asia, Latin America, and Africa ( Fig 2 ). These studies were divided into 2 categories: (1) articles that presented rural–urban comparison estimates ( n = 37) [ 4 – 7 , 9 , 25 , 39 , 42 – 44 , 49 , 53 , 59 – 62 , 65 , 69 , 72 , 75 , 78 , 83 , 85 , 86 , 88 , 93 , 95 – 97 , 101 , 109 , 119 , 120 , 125 , 126 , 133 , 135 ] and (2) articles that presented rural estimates ( n = 92) [ 4 – 9 , 19 , 25 , 40 – 71 , 73 – 78 , 80 – 82 , 84 , 85 , 87 , 89 – 94 , 97 – 100 , 102 – 109 , 111 – 119 , 121 , ...…”

Section: Resultsmentioning

confidence: 99%

“…An article often used a definition that allowed them to be placed in more than 1 category. When definitions related to population characteristics were used, it was more common for authors to consider population size (57.1%, n = 28) [ 8 , 19 , 44 , 46 , 48 , 50 , 61 , 63 , 64 , 68 , 70 , 74 , 76 , 82 , 83 , 86 , 94 , 100 , 102 , 103 , 105 , 106 , 108 , 109 , 116 , 119 , 122 , 128 ] than population density (28.6%, n = 14) [ 6 , 8 , 19 , 48 , 73 , 76 , 83 , 100 , 101 , 103 , 108 , 109 , 115 , 134 ] or housing density (14.3%, n = 7) [ 19 , 44 , 61 , 63 , 99 , 126 , 131 ]. When authors used environmental and land use definitions of rural, they tended to use various descriptors.…”

Section: Resultsmentioning

confidence: 99%

Characterizing dengue transmission in rural areas: A systematic review

et al. 2023

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Dengue has historically been considered an urban disease associated with dense human populations and the built environment. Recently, studies suggest increasing dengue virus (DENV) transmission in rural populations. It is unclear whether these reports reflect recent spread into rural areas or ongoing transmission that was previously unnoticed, and what mechanisms are driving this rural transmission. We conducted a systematic review to synthesize research on dengue in rural areas and apply this knowledge to summarize aspects of rurality used in current epidemiological studies of DENV transmission given changing and mixed environments. We described how authors defined rurality and how they defined mechanisms for rural dengue transmission. We systematically searched PubMed, Web of Science, and Embase for articles evaluating dengue prevalence or cumulative incidence in rural areas. A total of 106 articles published between 1958 and 2021 met our inclusion criteria. Overall, 56% (n = 22) of the 48 estimates that compared urban and rural settings reported rural dengue incidence as being as high or higher than in urban locations. In some rural areas, the force of infection appears to be increasing over time, as measured by increasing seroprevalence in children and thus likely decreasing age of first infection, suggesting that rural dengue transmission may be a relatively recent phenomenon. Authors characterized rural locations by many different factors, including population density and size, environmental and land use characteristics, and by comparing their context to urban areas. Hypothesized mechanisms for rural dengue transmission included travel, population size, urban infrastructure, vector and environmental factors, among other mechanisms. Strengthening our understanding of the relationship between rurality and dengue will require a more nuanced definition of rurality from the perspective of DENV transmission. Future studies should focus on characterizing details of study locations based on their environmental features, exposure histories, and movement dynamics to identify characteristics that may influence dengue transmission.

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Dengue-like illness surveillance: a two-year longitudinal survey in suburban and rural communities in the Lao People’s Democratic Republic and in Thailand

Cited by 8 publications

References 29 publications

Assessment of the global circulation and endemicity of dengue

Assessment of the global circulation and endemicity of dengue

Epidemiology and costs of dengue in Thailand: A systematic literature review

Characterizing dengue transmission in rural areas: A systematic review

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