Spatial distribution of potential and positive Aedes aegypti breeding sites

Abstract

Introducción. La distribución espacial de Aedes aegypti es heterogénea, y la interacción entre criaderos positivos y potenciales en el intradomicilio y el extradomicilio es uno de los aspectos más difíciles de caracterizar en los programas de control vectorial. Objetivo. Describir la relación espacial entre los criaderos potenciales y positivos de A. aegypti en el intradomicilio y en el extradomicilio en un sector de Cali, Colombia. Materiales y métodos. Se hizo una encuesta entomológica con el objetivo de recolectar datos de los criaderos en el intradomicilio y el extradomicilio. El análisis exploratorio de los datos espaciales incluyó la localización, la tendencia espacial, la autocorrelación espacial local, la continuidad espacial y la correlación espacial de los criaderos positivos y potenciales según el hábitat. Resultados. Se determinaron las tendencias espaciales. Mediante el análisis de autocorrelación espacial local se ubicaron los conglomerados de criaderos potenciales y positivos del extradomicilio. Se encontró una correlación positiva entre los criaderos potenciales y los positivos y una correlación negativa entre el intradomicilio y el extradomicilio. Conclusiones. La relación espacial entre criaderos positivos y potenciales de A. aegypti en el intradomicilio y el extradomicilio es dinámica y muy sensible a las características de cada territorio, por lo que establecer su distribución en el espacio contribuye a la priorización de recursos y acciones en los programas de control vectorial.Palabras clave: Aedes aegypti, dengue, Zika, chikungunya, análisis espacial. doi: https://doi.org/10.7705/biomedica.v34i2.3471 Spatial distribution of potential and positive Aedes aegypti breeding sitesIntroduction: The spatial distribution of Aedes aegypti is heterogeneous, and the interaction between positive and potential breeding sites located both inside and outside homes is one of the most difficult aspects to characterize in vector control programs. Objective: To describe the spatial relationship between potential and positive breeding sites of A. aegypti inside and outside homes in Cali, Colombia. Materials and methods:We conducted an entomological survey to collect data from both indoor and outdoor breeding sites. The exploratory analysis of spatial data included location, spatial trends, local spatial autocorrelation, spatial continuity and spatial correlation of positive and potential breeding sites according to habitat. Results: Spatial trends were identified, as well as clusters of potential and positive breeding sites outdoors using local spatial autocorrelation analysis. A positive correlation was found between potential and positive breeding sites, and a negative correlation existed between indoor and outdoor sites. Conclusions:The spatial relationship between positive and potential A. aegypti breeding sites both indoors and outdoors is dynamic and highly sensitive to the characteristics of each territory. Knowing how positive and potential breeding sites are distributed contributes to the prioritizati...

Spatial Analysis of Dengue Clusters at Department, Municipality and Local Scales in the Southwest of Colombia, 2014–2019

“…A consistent dengue hot spot during the study period was identified in the municipality of Patía (≥95% confidence). The other significant hot spots (Miranda, Puerto Tejada and Villa Rica) were mainly located in the northeastern regions of the department near the Valle del Cauca, as Cali is the third most important city in Colombia and is a place with hyperendemic transmission of dengue [ 39 ]. The size of the region is related to the geographical characteristics of the territory, since the hot spots lie in highly transited areas along the Pan-American Highway, a commercial and human corridor that connects the departments of southwestern Colombia.…”

“…For this analysis, a radius of 100 m was established as threshold distance within the neighbourhood area. This radius was selected based on the dispersal area of the vector [ 9 , 35 , 36 ] and the results of other similar studies [ 37 , 38 , 39 , 40 ]. The potential clusters with the highest burden of dengue per unit area were identified, based on the incidence rate in the neighbourhoods that permanently contribute to the cumulative burden of dengue cases in the municipal seat of Patía.…”

A Epidemia De Dengue Em Campinas-Sp Em 2015 E Sua Relação Com Fatores Socioeconômicos E Ambientais

“…O segundo se concentra em um agrupamento e dispersão espacial entre características de uma variável e outra variável em locais próximos. Métodos de autocorrelação espacial local vêm sendo empregados com sucesso para a detecção de hotspots de doenças vetoriais(JOHANSEN, DO CARMO e ALVES, 2016;CUARTAS et al, 2017; SCHULTES et al, 2021), bem como outros tipos de doença (SILVA,…”

Spatial stratification of the entomological risk for dengue transmission in neighborhoods of Asunción - Paraguay

“…Es decir que, el análisis de la distribución espacial del riesgo entomológico, estimado mediante diferentes indicadores, contribuye a mejorar la comprensión de los factores que favorecen la proliferación del vector del dengue y la dinámica de transmisión de la enfermedad. Además, con esta información es posible ubicar las zonas de mayor relevancia epidemiológica, contribuyendo con la organización de las tareas, direccionar toma de decisiones y movilizar recursos conforme al análisis de riesgo (12,13) . Además de los indicadores entomológicos de riesgo citados, otra estrategia que podría ayudar en la estratificación de las áreas prioritarias de intervención es la vigilancia entomovirológica.…”