Knowledge, attitudes and bite prevention practices and estimation of productivity of vector breeding sites using a Habitat Suitability Score (HSS) among households with confirmed dengue in the 2014 outbreak in Dar es Salaam, Tanzania

Msellemu, Daniel; Gavana, Tegemeo; Ngonyani, Hassan; Mlacha, Yeromin P.; Chaki, Prosper; Moore, Sarah

doi:10.1371/journal.pntd.0007278

Cited by 13 publications

(10 citation statements)

References 31 publications

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“…Although all the water-holding containers were found to have pupae, mosquito control measures targeting breeding habitats should be directed to water-holding containers perceived to hold water for longer periods. Similar observations were reported from other studies in Dar es Salaam, Tanzania [ 8 , 38 ] and Mombasa Kenya [ 35 , 36 ].…”

Section: Discussionsupporting

confidence: 91%

Aedes aegypti abundance, larval indices and risk for dengue virus transmission in Kinondoni district, Tanzania

et al. 2022

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Background Tanzania has experienced periodic dengue outbreaks with increased incidence since 2010. However, there is limited information on vector dynamics and transmission risk in most parts of the country. This study was conducted to determine Aedes mosquito abundance, larval indices and dengue virus infection rate as risk indicators for DENV transmission in Kinondoni district, Dar es Salaam, Tanzania. Methods A cross-sectional study was conducted in three wards of Kinondoni district in Tanzania between December 2019 and January 2020. In each ward, three streets were randomly selected for adult and immature mosquito sampling. The adult mosquitoes were collected using Mosquito Magnet traps, while mosquito larvae and pupae were inspected in water-holding containers in the selected household compounds. The detection of dengue virus (DENV) in female Aedes mosquitoes was done using a one-step reverse transcription–polymerase chain reaction (RT–PCR) method. Results Of the 1416 adult female mosquitoes collected, Ae. aegypti accounted for 16.8% (n = 238). A total of 333 water-holding containers were inspected and 201 (60.4%) had at least an Aedes larvae or pupae. Water-holding containers supporting the breeding of Aedes larvae and pupae included discarded car tires, flowerpots and small and large plastic containers. The overall House Index, Container Index and Breteau Index were 55.1%, 60.4% and 114.2, respectively. None of the 763 female Aedes mosquitoes tested by RT–PCR was found to be infected with DENV. Conclusion The presence and abundance Ae. aegypti mosquitoes and the large proportion of water-holding containers infested with the mosquito larvae and pupae put residents of Kinondoni district at high risk of DENV transmission. Our findings emphasize the need for continuous mosquito vector surveillance and control to prevent the possibility of future DENV outbreaks in Tanzania.

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Section: Discussionsupporting

confidence: 91%

Aedes aegypti abundance, larval indices and risk for dengue virus transmission in Kinondoni district, Tanzania

et al. 2022

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“…A high risk of contracting DENV in the old age group may be explained by continuous exposure to Flaviviruses [ 54 , 69 , 72 ]. The presence and abundance of Aedes mosquito vectors are known to increase risk of dengue exposure [ 98 , 99 ]. Evidence from some studies shows that people living in areas surrounding waste dump sites, opening windows at night, presence of stagnant water at home, households with indoor bathrooms, and living with open water containers were associated with a high risk of dengue [ 27 , 45 ].…”

Section: Discussionmentioning

confidence: 99%

Dengue Virus Infection and Associated Risk Factors in Africa: A Systematic Review and Meta-Analysis

Mwanyika

Mboera

Rugarabamu

et al. 2021

Viruses

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Dengue contributes a significant burden on global public health and economies. In Africa, the burden of dengue virus (DENV) infection is not well described. This review was undertaken to determine the prevalence of dengue and associated risk factors. A literature search was done on PubMed/MEDLINE, Scopus, Embase, and Google Scholar databases to identify articles published between 1960 and 2020. Meta-analysis was performed using a random-effect model at a 95% confidence interval, followed by subgroup meta-analysis to determine the overall prevalence. Between 1960 and 2020, 45 outbreaks were identified, of which 17 and 16 occurred in East and West Africa, respectively. Dengue virus serotype 1 (DENV-1) and DENV-2 were the dominant serotypes contributing to 60% of the epidemics. Of 2211 cases reported between 2009 and 2020; 1954 (88.4%) were reported during outbreaks. Overall, the prevalence of dengue was 29% (95% CI: 20–39%) and 3% (95% CI: 1–5%) during the outbreak and non-outbreak periods, respectively. Old age (6/21 studies), lack of mosquito control (6/21), urban residence (4/21), climate change (3/21), and recent history of travel (3/21) were the leading risk factors. This review reports a high burden of dengue and increased risk of severe disease in Africa. Our findings provide useful information for clinical practice and health policy decisions to implement effective interventions.

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“…The existence of A. egypti is inseparable from household behavior and habits to control mosquito nests [24]. People's behavior towards the use of gauze wire in low house ventilation, the use of mosquito nets during sleep, and draining the bathtub can all influence mosquito bites and increase vulnerability to dengue fever [25]. The active period of Aedes aegypti mosquitoes is around 07.00-17.00 WIB, while the peak occurs at 10.00 WIB and 17.00 WIB [22].…”

Section: Assessing Household Readiness In the Implementation Of Eco-h...mentioning

confidence: 99%

Eco-health survey effort to diagnose readiness for sustainability dengue prevention and control

Siyam

Hermawati

Fauzi

et al. 2023

IJPHS

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The prevention and control of dengue fever with the eco-health approach are crucial especially at the household level. However, the implementation is still limited and has continued to experience several obstacles. This study aimed to analyze the eco-health-based dengue vector control at the household level, identify the factors influencing decision-making, and assess household readiness towards the implementation. The study was conducted in Bandarharjo Village, the coastal area of Semarang City and the samples were residents who had settled for at least six months, selected using the purposive sampling technique. Furthermore, the household survey used a mixed method with quantitative and qualitative approaches. Data were collected through a Google Form, which consists of a questionnaire, an observation checklist by respondents, and interview guidelines with open- ended answer questions. The data were further analyzed with Univariate Analysis and qualitative data were processed with the Uwe Flick method. The results showed that the majority or 65.1% of the community is ready to carry out prevention and control with the eco-health method as indicated by the excellent and good readiness criteria of 14.7% and 50.5% respectively. Social capital and support from stakeholders, as well as community leaders, were found to strengthen community readiness for sustainable eco-health prevention and control of dengue fever.

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Knowledge, attitudes and bite prevention practices and estimation of productivity of vector breeding sites using a Habitat Suitability Score (HSS) among households with confirmed dengue in the 2014 outbreak in Dar es Salaam, Tanzania

Cited by 13 publications

References 31 publications

Aedes aegypti abundance, larval indices and risk for dengue virus transmission in Kinondoni district, Tanzania

Aedes aegypti abundance, larval indices and risk for dengue virus transmission in Kinondoni district, Tanzania

Dengue Virus Infection and Associated Risk Factors in Africa: A Systematic Review and Meta-Analysis

Eco-health survey effort to diagnose readiness for sustainability dengue prevention and control

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