Variation in Aedes aegypti(Diptera: Culicidae) container productivity in a slum and a suburban district of Rio de Janeiro during dry and wet seasons

Maciel-de-Freitas, Rafael; Marques, William A.; Peres, Roberto; Cunha, Sérgio Pereira da; Oliveira, Ricardo Lourenço de

doi:10.1590/s0074-02762007005000056

Cited by 131 publications

(131 citation statements)

References 14 publications

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“…Different situations have been described for other regions of Brazil. In the southeast, the flasks and drains groups were most commonly found to have immature forms of the vector in domiciles in the City of São Paulo, and a similar result was noted for the grease traps in the City of Rio de Janeiro 24,25 . Another study carried out in the north, in Manaus, Amazonas, found that the flasks and tires groups accounted for the largest number of larvae and pupae 17 .…”

Section: Discussionsupporting

confidence: 62%

Variation in Aedes aegypti (Linnaeus) (Diptera, Culicidae) infestation in artificial containers in Caxias, state of Maranhão, Brazil

Silva

Ibiapina

Bezerra

et al. 2012

Rev. Soc. Bras. Med. Trop.

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INTRODUCTION: Dengue is a serious public health problem worldwide, with cases reported annually in tropical and subtropical regions. Aedes aegypti (Linnaeus, 1762), the main vector of dengue, is a domiciliary species with high dispersal and survival capacities and can use various artificial containers as breeding sites. We assessed potential container breeding sites of A. aegypti in the municipality of Caxias, Maranhão, Brazil. METHODS: In the initial phase, we analyzed 900 properties in 3 neighborhoods during the dry and rainy seasons (August-October 2005 and February-April 2006, respectively). During the second sampling period, September 2006-August 2007, we used 5 assessment cycles for 300 properties in a single neighborhood. RESULTS: During the dry and rainy seasons, water-storage containers comprised 55.7% (n = 1,970) and 48.5% (n = 1,836) of the total containers inspected, and showed the highest productivity of immature A. aegypti; we found 23.7 and 106.1 individuals/container, respectively, in peridomicile sites. In intradomicile sites, water-storage containers were also the most important breeding sites with 86.4% (n = 973) and 85.6% (n = 900) of all containers and a mean of 7.9 and 108.3 individuals/container in the dry and rainy seaso-October 2006 (1,342). The highest number of positives (70) was recorded in May, mostly (94%) in storage containers. CONCLUSIONS: Storage containers are the principal and most productive A. aegypti breeding sites and are a major contributing factor to the maintenance of this vector in Caxias.

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Section: Discussionsupporting

confidence: 62%

Variation in Aedes aegypti (Linnaeus) (Diptera, Culicidae) infestation in artificial containers in Caxias, state of Maranhão, Brazil

Silva

Ibiapina

Bezerra

et al. 2012

Rev. Soc. Bras. Med. Trop.

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“…We fit both models to our data, using linear and nonlinear least squares standard procedures available in the software R 2.2.0 (R Development Core Team, http://www.R-proj ect.org). From the lower and upper 95% limits of the confidence interval for PDS (estimated by the nonlinear model), we derived two quantities: the average life expectancy, defined as 1/-loge PDS 22 , and longevity, defined as PDS 10 , where 10 is the duration of the extrinsic incubation period for dengue virus, when more than 76% of orally experimentally infected mosquitoes have the virus in the salivary glands 23 . Susceptible mosquitoes that survive in the field for 10 or more days after an infected blood meal are expected to live long enough to transmit the dengue virus.…”

Section: Estimation Of Daily Survival Ratesmentioning

confidence: 99%

“…It generally breeds in large artificial containers, has high daily survival rates, and moves across variable distances depending on the environment and climate, while its populations are highly genetically structured 3,4,5,6,7,8 . Differences in the degree of urbanization and in socio-economic status between adjacent blocks mean that Rio de Janeiro is a mosaic in terms of dengue epidemiology, where specific control activities for each area might be required 4,9,10 . Variations in the mosquito population size, daily survival rates, biting rates, and the duration of the extrinsic incubation period and/or dengue virus susceptibility within neighborhoods might elicit differential vectorial capacity, and consequently differences in disease transmission dynamics.…”

Section: Introductionmentioning

confidence: 99%

Calculating the survival rate and estimated population density of gravid Aedes aegypti (Diptera, Culicidae) in Rio de Janeiro, Brazil

2008

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Population size and daily survival rates of disease vectors are important determinants of vectorial capacity. A mark-release-recapture experiment was conducted in a dengue endemic urban neighborhood of Rio de Janeiro, Brazil, to estimate population size, survival rate and vectorial capacity of Aedes aegypti females using back-pack aspirators and gravid sticky traps (MosquiTRAP). Estimations of the gravid female population size were different when using data gathered from just the MosquiTRAP (3,505 individuals) or aspirator (1,470). However Ae. aegypti survival rates and longevity were similar irrespective of the method of capture. Up to 26.3% of released females would be able to survive for more than 10 days, the length of time of the extrinsic incubation period. Vectorial capacity value ranged between 0.01567 and 0.4215 and the basic reproductive number (R0) was estimated to be between 0.0695 and 1.88.

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“…Besides, Aedes aegypti is an urban mosquito that makes use of available infrastructure for its reproduction (32,33).…”

Section: Discussionmentioning

confidence: 99%

Monitoring the Paraguayan epidemiological dengue surveillance system (2009-2011) using Benford’s law

et al. 2016

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Introduction:Dengue is the most widespread arbovirus worldwide. In Paraguay, it reappeared in [1988][1989], with one of the largest epidemic outbreaks occurring in 2011. Objective: To evaluate the performance of the dengue epidemiological surveillance system in Paraguay between 2009 and 2011. Materials and methods:We conducted an ecological study with secondary epidemiological surveillance data. We analyzed notified cases of the disease based on the distribution expected by Benford's law. To this end, we used the first and second digits from the global records stratified by region, season, population density, indicators of housing conditions and heads of cattle. Results: The epidemiological surveillance system performed better during non-epidemic periods and in the states with better housing conditions and fewer heads of cattle. Conclusion: Given that a difference in the performance existed, we recommended that the system remains operating at the same high alert level even during periods when fewer cases are expected. The technology used by the method proposed to monitor the notification of cases is easy to transfer to operational staff. Materiales y métodos. Se hizo un estudio ecológico basado en datos secundarios de la vigilancia epidemiológica. Con base en la distribución esperada según la ley de Benford, se analizaron los casos notificados de la enfermedad; para tal fin, se usaron los primeros y segundos dígitos de los registros globales y estratificados por regiones, estaciones, densidad poblacional, indicadores de las condiciones de la vivienda y número de cabezas de ganado bovino. Resultados. El sistema de vigilancia epidemiológica se desempeñó mejor durante los periodos no epidémicos, y en los departamentos donde existen mejores condiciones de vivienda y pocas cabezas de ganado bovino.584 Biomédica 2016;36:583-92 Gómez-Camponovo M, Moreno J, Idrovo ÁJ, et al. Conclusión. Dadas las diferencias de desempeño, se recomendó que el sistema mantenga la alerta incluso cuando no se espere un mayor número de casos. El método propuesto para evaluar la notificación de casos es fácil de transferir al personal operativo.Palabras clave: control de vectores; notificación de enfermedad; vigilancia epidemiológica; dengue; distribuciones estadísticas; Paraguay. doi: http://dx

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Variation in Aedes aegypti(Diptera: Culicidae) container productivity in a slum and a suburban district of Rio de Janeiro during dry and wet seasons

Abstract: Seasonal variation in container productivity and infestation levels by

Cited by 131 publications

References 14 publications

Variation in Aedes aegypti (Linnaeus) (Diptera, Culicidae) infestation in artificial containers in Caxias, state of Maranhão, Brazil

Variation in Aedes aegypti (Linnaeus) (Diptera, Culicidae) infestation in artificial containers in Caxias, state of Maranhão, Brazil

Calculating the survival rate and estimated population density of gravid Aedes aegypti (Diptera, Culicidae) in Rio de Janeiro, Brazil

Monitoring the Paraguayan epidemiological dengue surveillance system (2009-2011) using Benford’s law

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