Applicability of the Mexican ovitrap system for Aedes vector surveillance in Colombia

Wright, Eduardo; Carrillo, Maria; Matamoros, David; Cárdenas, Rocío; Yañez, Johanna; Lorenzo, Giusseppe Di; Villa, Juan Manuel; Kroeger, Axel

doi:10.1080/20477724.2022.2146049

Cited by 3 publications

(2 citation statements)

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“…Ovitrap surveillance system was also found to be effective in detecting Aedes mosquito even when the population was low and provides information of breeding habitat behaviour. (Wright et al, 2022) [27] . Several countries, including Mexico and Brazil, have implemented ovitrap surveillance systems as a public health policy, with precise guidelines and standardization of their systems.…”

Section: Introductionmentioning

confidence: 99%

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Dengue vector (Aedes aegypti) control in south Chennai using ovitraps through community participation

Malarvizhi,

Zehra,

Poonguzhali

2023

Int. J. Mosq. Res.

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Dengue fever, caused by the Dengue virus (DENV), is a mosquito-borne disease that poses a significant public health threat in many parts of the world. The primary vector for dengue transmission in Tamil Nadu is the Aedes aegypti mosquito, which exhibits anthropophilic behavior and prefers breeding in stagnant water in residential areas. This research paper focuses on evaluating the effectiveness of using ovitraps, modified with locally available materials, for Aedes aegypti control in Chennai through community participation. Five sampling locations within Chennai were selected for the surveillance study (K.K. Nagar, Nesapakkam, J.B.A.S College, Triplicane and Royapettah). Ovitraps of 5 different colors, such as black, blue, red, orange, and white were used. The egg counts varied across different locations, time periods and different coloured ovitraps. Nesapakkam area exhibited the highest egg counts, suggesting the presence of factors such as poor sanitation and drainage that promote mosquito breeding. The results of the study showed that the highest number of Aedes aegypti eggs was collected during the months of February-March, indicating increased mosquito breeding activity during the dry season. The study also found that black and blue ovitraps yielded the highest number of eggs, while red, orange, and white ovitraps had lower counts. These findings highlight the potential effectiveness of color-coded ovitraps in capturing mosquito eggs and suggest the importance of seasonal monitoring and targeted vector control efforts. To protect the public from dengue/DHF, large-scale dengue prevention can be implemented by combining this system with other routine prevention measures. This will enable individuals to integrate and learn more about the effective control of dengue vectors.

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Section: Introductionmentioning

confidence: 99%

“…These systems offer valuable data for vector and disease control, as well as scientific investigations. (Wright et al, 2022) [27] . In South Chennai, a densely populated urban area in Tamil Nadu, dengue poses a significant public health concern, necessitating effective mosquito control measures.…”

Section: Introductionmentioning

confidence: 99%

Dengue vector (Aedes aegypti) control in south Chennai using ovitraps through community participation

Malarvizhi,

Zehra,

Poonguzhali

2023

Int. J. Mosq. Res.

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Aedes aegypti control in breeding sites through an insecticidal coating with dual effect: Laboratory trials and safety assessment

Cárdenas,

Cabrera,

Carrillo

et al. 2024

Medical Vet Entomology

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Ground water tanks are known to be preferred Aedes aegypti oviposition places providing opportunities for adult and larvae control. Therefore, a dual‐effect insecticidal coating (IC) (alphacypermethrin/ pyriproxyfen) with a slow‐release mechanism and safe for users could be applied within Aedes spp. breeding sites, representing a promising option. Bioassays were designed to determine the mortality and sterilizing effects on gravid mosquitoes exposed to IC. The effect of inhibition of emergence was evaluated in eggs, larvae and pupae exposed in different containers. For the water safety assessment concentrations of active ingredients were determined by reverse phase high performance liquid chromatography (RP‐HPLC) and the health risk was calculated. The IC applied to the interior walls of water‐holding containers showed efficacy against Ae. aegypti in terms of high gravid‐female mortality (81% at 24 h, p < 0.01), sterilizing effect (inhibition of oviposition by 63%, p < 0.01) and emergence inhibition (100% in eggs, L3 and L4; 97% in pupae). The offspring rate was reduced [only 0.15 (38/250) new adults emerged per exposed gravid females as against 11.90 per unexposed female (2976/250) at baseline]. Emergence inhibition was recorded up to 12 months and adult mortality >80% up to 6 months. The use of water stored in treated containers, either for washing or drinking, is not expected to pose a health risk to users. IC applied to domestic water containers has dual and complementary action that reduces Ae. aegypti densities (immature and adult stages). This represents baseline information for a cluster randomized efficacy trial in Colombia.

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Enabling countries to manage outbreaks: statistical, operational, and contextual analysis of the early warning and response system (EWARS-csd) for dengue outbreaks

Schlesinger,

Prieto Alvarado,

Borbón Ramos

et al. 2024

Front. Public Health

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IntroductionDengue is currently the fastest-spreading mosquito-borne viral illness in the world, with over half of the world's population living in areas at risk of dengue. As dengue continues to spread and become more of a health burden, it is essential to have tools that can predict when and where outbreaks might occur to better prepare vector control operations and communities' responses. One such predictive tool, the Early Warning and Response System for climate-sensitive diseases (EWARS-csd), primarily uses climatic data to alert health systems of outbreaks weeks before they occur. EWARS-csd uses the robust Distribution Lag Non-linear Model in combination with the INLA Bayesian regression framework to predict outbreaks, utilizing historical data. This study seeks to validate the tool's performance in two states of Colombia, evaluating how well the tool performed in 11 municipalities of varying dengue endemicity levels.MethodsThe validation study used retrospective data with alarm indicators (mean temperature and rain sum) and an outbreak indicator (weekly hospitalizations) from 11 municipalities spanning two states in Colombia from 2015 to 2020. Calibrations of different variables were performed to find the optimal sensitivity and positive predictive value for each municipality.ResultsThe study demonstrated that the tool produced overall reliable early outbreak alarms. The median of the most optimal calibration for each municipality was very high: sensitivity (97%), specificity (94%), positive predictive value (75%), and negative predictive value (99%; 95% CI).DiscussionThe tool worked well across all population sizes and all endemicity levels but had slightly poorer results in the highly endemic municipality at predicting non-outbreak weeks. Migration and/or socioeconomic status are factors that might impact predictive performance and should be further evaluated. Overall EWARS-csd performed very well, providing evidence that it should continue to be implemented in Colombia and other countries for outbreak prediction.

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Applicability of the Mexican ovitrap system for Aedes vector surveillance in Colombia

Cited by 3 publications

References 38 publications

Dengue vector (Aedes aegypti) control in south Chennai using ovitraps through community participation

Dengue vector (Aedes aegypti) control in south Chennai using ovitraps through community participation

Aedes aegypti control in breeding sites through an insecticidal coating with dual effect: Laboratory trials and safety assessment

Enabling countries to manage outbreaks: statistical, operational, and contextual analysis of the early warning and response system (EWARS-csd) for dengue outbreaks

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