Reduction in dengue cases observed during mass control of Aedes (Stegomyia) in street catch basins in an endemic urban area in Colombia
Open accessAbstract
Dengue incidence continues to increase globally and, in the absence of an efficacious vaccine, prevention strategies are limited to vector control. It has been suggested that targeting the most productive breeding sites instead of all water-holding containers could be a cost-effective vector control strategy. We sought to identify and continuously control the most productive Aedes (Stegomyia) breeding site in an endemic urban area in Colombia and followed the subsequent incidence of dengue. In the urban area of Guadalajara de Buga, southwestern Colombia, potential breeding sites inside and outside houses were first characterized, and local personnel trained to assess their productivity based on the pupae/person index. Simultaneously, training and monitoring were implemented to improve the dengue case surveillance system. Entomological data and insecticide resistance studies were used to define the targeted intervention. Then, a quasi-experimental design was used to assess the efficacy of the intervention in terms of the positivity index of the targeted and non- targeted breeding sites, and the impact on dengue cases. Street catch basins (storm drains) were the potential breeding site most frequently found containing Aedes immature stages in the baseline (58.3% of 108). Due to the high resistance to temephos (0% mortality after 24 h), the intervention consisted of monthly application of pyriproxyfen in all the street catch basins (n = 4800). A significant decrease in catch basins positivity for Aedes larvae was observed after each monthly treatment (p < 0.001). Over the intervention period, a reduction in the dengue incidence in Buga was observed (rate ratio 0.19, 95% CI 0.12–0.30, p < 0.0001) after adjusting for autocorrelation and controlling with a neighboring town, Palmira, This study highlights the importance of street catch basins as Aedes breeding sites and suggests that their targeted control could help to decrease dengue transmission in such areas.
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In a quasi-experimental study, larviciding using the insect growth regulator Pyriproxyfen delivered as part of a community-based strategy significantly reduced the rate of dengue incidence in the intervention group (RR 0.19; 95% CI 0.12, 0.30).
“In quasi-experimental design, larviciding using the insect growth regulator Pyriproxyfen delivered as part of a community-based strategy, was reported to have significantly reduced the rate of dengue incidence in the intervention group: RR 0.19 (95% CI 0.12, 0.30) (S3 Fig) [80].”
From Is Dengue Vector Control Deficient in Effectiveness or Evidence?: Systematic Review and Meta-analysis (2016) · cites this paper as [80]
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“Variously, the studies investigated: clean-up campaigns in conjunction with IRS and larviciding [46]; community-based environmental management (including community-based environmental management, source reduction, larviciding, education, promote formation of CWGs, water covers) [48]; source reduction, larviciding and…”
Background
- Authors
- Ocampo, C. B., Mina, N. J., Carabalí, M., Alexander, N., & Osorio, L.
- Affiliations
- Centro Internacional de Entrenamiento e Investigaciones Medicas (CO)
- Corresponding author
- Ocampo, Clara B.
- Venue
- Acta Tropica
- Publisher
- Elsevier BV
- Published
- 2014-04
- Volume
- 132
- Pages
- 15-22
- ISSN
- 0001-706X (ISSN-L)
- PMC
- PMC4654410
- OpenAlex
- W2073543973
- Semantic Scholar
- 52954c077ed8fd6a3852949620c621b54caec53d
- Cited by
- 57
- References
- 27
- Citations by year
- 2025: 3 · 2024: 3 · 2023: 6 · 2022: 4 · 2021: 3 · 2020: 3 · 2019: 4 · 2018: 7 · 2017: 6 · 2016: 7 · 2015: 9 · 2014: 2
- FWCI
- 7.92
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Acta Tropica (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Funders
- Fogarty International Center (D43TW006589)
- Topics
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Mosquito-borne diseases and control
- Social Sciences › Sociology and Political Science › Dengue and Mosquito Control Research
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Malaria Research and Control
- Keywords
- dengue, Aedes aegypti, vector control, storm drains, pyriproxyfen, temephos resistance, dengue incidence, urban dengue, Guadalajara de Buga
- MeSH terms
- Adolescent, Adult, Aedes, Aged, Aged, 80 and over, Animals, Child, Child, Preschool, Colombia, Dengue, Entomology, Female, Humans, Infant, Infant, Newborn, Insecticide Resistance, Insecticides, Male, Middle Aged, Mosquito Control, Urban Population, Young Adult
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