Use of ovitrap surveillance to assess dengue outbreak risks in selected dengue endemic areas in Sri Lanka

Nirmani, M. D.; Perera, K.L.N.S.; Galhena, Gayani

doi:10.4038/sljb.v4i2.39

Cited by 3 publications

(5 citation statements)

References 16 publications

(28 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Another study in Brazil also indicated that data gathered by ovitraps could be used for dengue incidence warning signals up to two months earlier and had a good predictive power for upcoming dengue outbreaks [ 48 ]. This finding was in accordance with a study carried out in Sri Lanka, which examined several area with repeated dengue epidemics, showing that mosquito density depicted in the OI is positively correlated with dengue incidence [ 63 ].…”

Section: Discussionsupporting

confidence: 92%

Potential Way to Develop Dengue Virus Detection in Aedes Larvae as an Alternative for Dengue Active Surveillance: A Literature Review

Rachmawati,

Ekawardhani,

Fauziah

et al. 2024

TropicalMed

View full text Add to dashboard Cite

The burden of dengue has emerged as a serious public health issue due to its impact on morbidity, mortality, and economic burden. Existing surveillance systems are inadequate to provide the necessary data for the prompt and efficient control of dengue. Passive surveillance of dengue cases may lead to underreporting and delayed mitigation responses. Improved dengue control program requires sensitive and proactive methods for early detection of dengue. We collected and reviewed existing research articles worldwide on detecting dengue virus in Aedes species larvae. Searches were conducted in PUBMED and Google Scholar, including all the studies published in English and Bahasa Indonesia. Twenty-nine studies were included in this review in terms of assay used, positivity rate, and dengue serotype detected. The presence of dengue virus in immature mosquitoes was mostly detected using reverse transcription PCR (RT-PCR) in pooled larvae. In one study, dengue virus was detected in larvae from laboratory-infected mosquitoes using enzyme-linked immunosorbent assay (ELISA). The positivity rate of dengue virus detection ranged from 0 to 50% in field-caught larvae. Although various methods can detect the dengue virus, further research encourages the use of low-cost and less laborious methods for active surveillance of dengue in larvae.

show abstract

Section: Discussionsupporting

confidence: 92%

Potential Way to Develop Dengue Virus Detection in Aedes Larvae as an Alternative for Dengue Active Surveillance: A Literature Review

Rachmawati,

Ekawardhani,

Fauziah

et al. 2024

TropicalMed

View full text Add to dashboard Cite

show abstract

“…aegypti prefers indoor breeding to outdoor while Ae. albopictus prefers both indoor and outdoor breeding [ 12 , 22 , 23 ]. Both the feeding and breeding behavior of Ae.…”

Section: Discussionmentioning

confidence: 99%

Weather-Based Prediction Models for the Prevalence of Dengue Vectors Aedes aegypti and Ae. albopictus

Herath

Abeyasundara

Silva

et al. 2022

Journal of Tropical Medicine

View full text Add to dashboard Cite

Dengue is an important vector-borne disease transmitted by the mosquitoes Aedes aegypti and Ae. albopictus. In the absence of an effective vaccine, vector control has become the key intervention tool in controlling the disease. Vector densities are significantly affected by the changing weather patterns of a region. The present study was conducted in three selected localities, i.e., urban Bandaranayakapura, semiurban Galgamuwa, and rural Buluwala in the Kurunegala district of Sri Lanka to assess spatial and temporal distribution of dengue vector mosquitoes and to predict vector prevalence with respect to changing weather parameters. Monthly ovitrap surveys and larval surveys were conducted from January to December 2019 and continued further in the urban area up to December 2021. Aedes aegypti was found moderately in the urban area and to a lesser extent in semiurban but not in the rural area. Aedes albopictus had the preference for rural over urban areas. Aedes aegypti preferred indoor breeding, while Ae. albopictus preferred both indoor and outdoor. For Ae. albopictus, ovitrap index (OVI), premise index (PI), container index (CI), and Breteau index (BI) correlated with both the rainfall (RF) and relative humidity (RH) of the urban site. Correlations were stronger between OVI and RH and also between BI and RF. Linear regression analysis was fitted, and a prediction model was developed using BI and RF with no lag period (R2 (sq) = 86.3%; F = 53.12; R2 (pred) = 63.12%; model: Log10 (BI) = 0.153 + 0.286 ∗ Log10 (RF); RMSE = 1.49). Another prediction model was developed using OVI and RH with one month lag period (R2 (sq) = 70.21%; F = 57.23; model: OVI predicted = 15.1 + 0.528 ∗ Lag 1 month RH; RMSE = 2.01). These two models can be used to monitor the population dynamics of Ae. albopictus in urban settings to predict possible dengue outbreaks.

show abstract

“…A house which is clean from mosquito nests does not mean free from mosquitoes. Mosquitoes can fly 50-100 m, so mosquitoes can visit our homes from other places [3,6,7]. Puddles of water in house gutters, used goods and garbage that can accommodate rainwater, water storage containers in public places such as mosques, schools, or public buildings are places that mosquito can lay eggs and can act as sources of mosquitoes for the environment [3,[13][14][15].…”

Section: Discussionmentioning

confidence: 99%

“…About three days after the female mosquito sucks blood, she will lay her eggs. Aedes mosquitoes do not fly far, they only fly 50-100 meters during their lifetime, even research in Peru states that Aedes only move about 30 meters, so after sucking blood, mosquitoes tend to lay eggs inside the house [3,6,7,18,19].…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

The Correlation Between the Oviposition of Aedes Sp. and the Features of a House

Astuti

Tresnasari

Trusda

2022

KLS

View full text Add to dashboard Cite

Aedes aegypti mosquitoes exhibit specific behavior when choosing their nest. This study was conducted on April 2021 and aimed to assess the correlation between the oviposition habit of female Aedes sp. and the features of a house in 34 adjacent houses in the Tamansari area. Ovitraps were placed indoors and outdoors at each house. The number of mosquitoes that laid eggs were estimated by dividing the number of eggs found in the ovitrap by the average number of eggs produced by female mosquitoes. Data about the features of the houses were obtained by observing the houses and interviewing the house owners. Results showed that 79.41% of the houses had the Aedes sp.’s egg in an ovitrap. There was a correlation between the number of indoor oviposition mosquitoes and the number of occupants (p=0.04; r=0.35). There was also a correlation between the number of outdoor oviposition mosquitoes and the ratio of the house’s area (m2) per number of occupants (p=0.03; r=0.36). We conclude that mosquitoes prefer to nest inside a house with a lot of occupants and prefer to nest outside a house that is spacious and has few residents. Keywords: aedes, house, oviposition

show abstract

Use of ovitrap surveillance to assess dengue outbreak risks in selected dengue endemic areas in Sri Lanka

Cited by 3 publications

References 16 publications

Potential Way to Develop Dengue Virus Detection in Aedes Larvae as an Alternative for Dengue Active Surveillance: A Literature Review

Potential Way to Develop Dengue Virus Detection in Aedes Larvae as an Alternative for Dengue Active Surveillance: A Literature Review

Weather-Based Prediction Models for the Prevalence of Dengue Vectors Aedes aegypti and Ae. albopictus

The Correlation Between the Oviposition of Aedes Sp. and the Features of a House

Contact Info

Product

Resources

About