Effect of rainfall duration on Aedes aegypti population

Tokachil, Najir; Yusoff, Nuraini

doi:10.1063/1.5041612

Cited by 6 publications

(4 citation statements)

References 12 publications

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“…Dengue cases were then analysed against the rainfall data for the duration of the outbreak period. Average rainfall was plotted against numbers of dengue cases confirmed in that month with a two week time-lag between the rainfall and incidence of the cases [18] to account for the time period between rainfall and cases as seen by other authors [19,20].…”

Section: Data Collectionmentioning

confidence: 99%

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

et al. 2020

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Background The frequency and magnitude of dengue epidemics has increased dramatically throughout the tropics in the past 40 years due to unplanned urbanization, globalization and lack of effective mosquito control. The commercial capital of Tanzania, Dar es Salaam, is now experiencing regular dengue outbreaks. Three dengue serotypes have been detected in Dar es Salaam (DNV 1, 2 and 3). Without adequate vector monitoring and control, further outbreaks will certainly occur.

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Section: Data Collectionmentioning

confidence: 99%

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

et al. 2020

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“…Climatic factors are essential to the dynamics of mosquitoes in the epidemiological trend related to the transmission of diseases [31]. Temperature is usually associated with the effects on the viability of egg, larval development, longevity, and adult dispersal, whereas rainfalls affect the productivity of the mosquitoes and abundance of the species [32–33]. In San Luis, Brazil, the rainfall and three months’ lag of precipitation positively correlate with dengue cases reported [34].…”

Section: Discussionmentioning

confidence: 99%

Small-scale field assessment of efficacy of the autodissemination approach against Aedes sp. in an urban area

Ngesom¹,

Othman

Bahauddin³

et al. 2020

Preprint

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This is the first study to evaluate the efficacy of an autodissemination approach, as suggested by WHO. Therefore, the efficacy of an autodissemination approach in small-scale field trials against wild Aedes sp. population was evaluated in an urbanized setting, Malaysia. Lethal ovitraps enhanced with pyriproxyfen were used to control Aedes sp. populations at treatment sites, with the autodissemination activity was assessed using the WHO larval bioassays. Lethal ovitraps enhanced with pyriproxyfen effectively reduced of Aedes sp. population. All autodissemination stations were shown to be visited by Aedes sp. mosquitoes with 100% complete inhibition against eggs and larvae development. In the larvae bioassay, pupae mortality ranged from 14 to 40%. Statistically, a significant reduction of Aedes sp. population in the treatment sites compared to the untreated areas. The study proved for the autodissemination of pyriproxyfen to breeding habitats by wild Aedes sp. This technique is highly potentially for vector control activities. Future evaluation should focus on large-scale field trials.Author SummarySince 2012, Dataran Automobil, Seksyen 15, Shah Alam, was declared as one of the dengue hotspot areas. Major vector control activities were conducted by government, NGOs, social communities, and local authorities, but the number still rising. We conducted a new invention of autodissemination concepts in this area by an entomological study on mosquito populations reduction and dispersal abilities of the technique. We found that the technique has proven to control mosquito populations, but the other factors such as epidemiology link still unclear and need further clarification. Our finding highlighted the effectiveness of autodissemination strategies that can be considered as one of the alternative tools in vector control programme.

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“…We believe that climatic factors may also contribute to changes in epidemiological transmission of diseases related to mosquito population dynamics , egg viability, larval development, and adult dispersal, while rainfall affects mosquito productivity and abundance of species (Tokachil et al 2018;Valdez et al 2018). Although each factor individually affects the biological system of Aedes mosquitoes, interaction between different factors will have a significant impact on the final proportion of mosquitoes (Azhar et al 2016;Zapletal et al 2018).…”

Section: Populationsmentioning

confidence: 99%

Evaluating the Potential of Pyriproxyfen Dissemination using Mosquito Home System against Aedes albopictus at a Dengue Hotspot Area

Ngesom

Ahmad²,

Lee³

et al. 2021

JSM

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Aedes mosquitoes were found to lay their eggs in the cryptic breeding sites. Eliminating cryptic and open breeding sites is essential in reducing dengue virus transmission. However, it is often challenging for health officers to assess these breeding sites which are usually missed during larval surveillance. The autodissemination approach may produce a better outcome by manipulating female mosquitoes to disperse insecticide to other Aedes spp. mosquito habitats. Thus, the present study aims to evaluate the effectiveness of the pyriproxyfen autodissemination technique using Mosquito Home System against the population of mosquitoes. This study was conducted in Bandar Baru Bangi, Selangor, Malaysia. The Mosquito Home System was deployed to control Aedes spp. populations at treatment sites using before-after-control-impact (BACI) design. The presence of pyriproxyfen distribution was confirmed using the WHO larval bioassay which resulted in 10-35% larvae mortalities. Autodissemination of pyriproxyfen significantly reduced the population size of mosquito eggs (p<0.05), larvae (p<0.05), and ovitrap index (p<0.05) at the treatment areas compared to the control areas. Moreover, rainfall was correlated positively against ovitrap index (r = 0.247), larvae (r = 0.420), and eggs (r = 0.422). The study provides promising results for controlling Aedes spp. populations and also highlights the potentials of this technique as an alternative in vector control programmes. However, further studies on larger scale field trials are warranted.

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Effect of rainfall duration on Aedes aegypti population

Cited by 6 publications

References 12 publications

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

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

Small-scale field assessment of efficacy of the autodissemination approach against Aedes sp. in an urban area

Evaluating the Potential of Pyriproxyfen Dissemination using Mosquito Home System against Aedes albopictus at a Dengue Hotspot Area

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