Evaluation of Household Bleach as an Ovicide for the Control of<i>Aedes aegypti</i>

Mackay, Andrew J.; Amador, Manuel; Félix, Gilberto; Acevedo, Verónica; Barrera, Roberto

doi:10.2987/14-6427r.1

Cited by 6 publications

(1 citation statement)

References 23 publications

(26 reference statements)

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“…In our study, almost half of the population (46.4%) reported putting chlorine tablets (which they purchase on the street or on the market) in the water of their laundry tanks as vector control method. Chlorine has been used to clean and eliminate immature stage of mosquitoes in water containers [ 63 , 64 ] but there is only scarce evidence on the use of chlorine tablets regarding its efficacy against insect larvae in laundry tanks, and there is no information on dosage and the safe use of chlorinated water for drinking.…”

Section: Discussionmentioning

confidence: 99%

Risk of dengue, Zika, and chikungunya transmission in the metropolitan area of Cucuta, Colombia: cross-sectional analysis, baseline for a cluster-randomised controlled trial of a novel vector tool for water containers

Carrillo

Cárdenas

Yañez³

et al. 2023

BMC Public Health

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Background Arbovirus diseases such as dengue, Zika, and chikungunya are a public health threat in tropical and subtropical areas. In the absence of a vaccine or specific treatment, vector management (in this case the control of the primary vector Aedes aegypti) is the best practice to prevent the three diseases. A good understanding of vector behaviour, ecology, human mobility and water use can help design effective vector control programmes. This study collected baseline information on these factors for identifying the arbovirus transmission risk and assessed the requirements for a large intervention trial in Colombia. Methods Baseline surveys were conducted in 5,997 households, randomly selected from 24 clusters (neighbourhoods with on average 2000 houses and 250 households inspected) in the metropolitan area of Cucuta, Colombia. The study established population characteristics including water management and mobility as well as larval-pupal indices which were estimated and compared in all clusters. Additionally, the study estimated disease incidence from two sources: self-reported dengue cases in the household survey and cases notified by the national surveillance system. Results In all 24 study clusters similar social and demographic characteristics were found but the entomological indicators and estimated disease incidence rates varied. The entomological indicators showed a high vector infestation: House Index = 25.1%, Container Index = 12.3% and Breteau Index = 29.6. Pupae per person Index (PPI) as an indicator of the transmission risk showed a large range from 0.22 to 2.04 indicating a high transmission risk in most clusters. The concrete ground tanks for laundry –mostly outdoors and uncovered- were the containers with the highest production of Ae. aegypti as 86.3% of all 17,613 pupae were identified in these containers. Also, the annual incidence of dengue was high: 841.6 self-reported cases per 100,000 inhabitants and the dengue incidence notified by the National surveillance system was 1,013.4 cases per 100,000 in 2019. Only 2.2% of the households used container water for drinking. 40.3% of the study population travelled during the day (when Aedes mosquitoes bite) outside their clusters. Conclusions The production of Ae. aegypti mosquitoes occurred almost exclusively in concrete ground tanks for laundry (lavadero), the primary intervention target. The baseline study provides necessary evidence for the design and implementation of a cluster randomized intervention trial in Colombia.

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Section: Discussionmentioning

confidence: 99%