Aedes aegypti Immature Forms Distribution According to Type of Breeding Site

Medronho, Roberto de Andrade; Macrini, Leonardo; Novellino, Daniele M.; Lagrotta, Marcos Thadeu Fernandes; Câmara, Volney de Magalhães; Pedreira, Carlos Eduardo

doi:10.4269/ajtmh.2009.80.401

Cited by 34 publications

(31 citation statements)

References 11 publications

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“…In Fortaleza, the water tank is a container for large volumes of water (greater than 200 litres), whose inner surfaces are coated with cement, and are located above ground level and emptied from the bottom. Tanks are potential breeding sites with epidemiological significance for the transmission of dengue, due to the frequency with which they are found infested with Aedes aegypti 20,21 and the high proportion of households with a water tank. In the city of Fortaleza, there are 779,782 households, 377,726 (48%) of these have water tanks 13 .…”

Section: Discussionmentioning

confidence: 99%

Influence of water replacement on Diflubenzuron duration effect in the control of Aedes aegypti in simulated field conditions, in Northeastern Brazil

et al. 2013

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Introduction: Theoretically, it is possible to control dengue by reducing breeding sites. However in most countries, it has not been possible to obtain sustainable dengue control using only the reduction of potential breeding sites thus use of larvicides continues to be necessary. This paper presents an estimate of the rate of water replacement in residential water containers in the city of Fortaleza, northeast Brazil, and the respective duration of the effect of Diflubenzuron on Aedes aegypti immatures. Methods: Several trials were performed to estimate the duration of the effect of Diflubenzuron in simulated field conditions with replacement daily with 20% by volume of water. Eighteen containers with 20 litres of water treated with Diflubenzuron, and 6 containers with well water were used. The initial concentration of Diflubenzuron in the treated containers was 2.875 x 10-4 grams/litre. Third stages larvae were added to the containers, the first day of experiment. All the containers were inspected daily and dead larvae and pupae were removed and counted. Each trial was terminated when all larvae added to one of the groups (treated or control) had died or pupated. Results: From the 1st to the 19th day, the Diflubenzuron achieved 100% control, adjusting for the emergence of pupae in untreated containers not allowing any larvae to develop into pupae. From the 20th to the 70th day, the control ranged from 97.9% to 36.6%. Conclusions: This study reports a good larvicide effect of Diflubenzuron in the doses used by the Brazilian Programme of Dengue Control.

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Section: Discussionmentioning

confidence: 99%

Influence of water replacement on Diflubenzuron duration effect in the control of Aedes aegypti in simulated field conditions, in Northeastern Brazil

et al. 2013

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“…aegypti breeding sites are found both outdoors and indoors [4], [51]. While the photosensitization approach is expected to be effective on larvae located in outdoor containers, which are common productive breeding sites [49], [52]–[53], a major challenge is represented by breeding sites receiving little sunlight because of their shape or because of indoor or shaded location, a condition that for Ae. aegypti is not infrequent [54]–[55].…”

Section: Discussionmentioning

confidence: 99%

“…In particular, interventions like improvement of water supply infrastructures, regular waste collection services and educational campaigns are crucial for the control of Ae. aegypti populations and hence dengue transmission [52], [57]. Chemical control through the use of larvicides, however, currently represents a valuable measure in many settings, and may benefit from the availability of new approaches and strategies, such as the bait-driven photosensitization described in this work, to complement its existing tools.…”

Section: Discussionmentioning

confidence: 99%

Novel, Meso-Substituted Cationic Porphyrin Molecule for Photo-Mediated Larval Control of the Dengue Vector Aedes aegypti

et al. 2011

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BackgroundControl of the mosquito vector population is the most effective strategy currently available for the prevention of dengue fever and the containment of outbreaks. Photo-activated oxidants may represent promising tools for developing effective, safe and ecofriendly novel larvicides. The purpose of this study was to evaluate the potential of the synthetic meso-substituted porphyrin meso-tri(N-methylpyridyl), meso-mono(N-tetradecylpyridyl)porphine (C14) as a photoactivatable larvicide against the dengue vector Aedes (Stegomyia) aegypti.MethodologyThe photophysical and photochemical properties of the C14 molecule were assessed spectrophotometrically. Photomediated larvicidal efficacy, route of intake and site of action were determined on Ae. aegypti larvae by laboratory bioassays and fluorescence microscopy. Using powdered food pellet for laboratory rodents (a common larval food used in the laboratory) as a carrier for C14, loading-release dynamics, larvicidal efficacy and residual activity of the C14-carrier complex were investigated.Main FindingsThe C14 molecule was found to exert a potent photosensitizing activity on Ae. aegypti larvae. At irradiation intervals of 12 h and 1 h, at a light intensity of 4.0 mW/cm2, which is 50–100 times lower than that of natural sunlight, LC50 values of 0.1 µM (0.15 mg/l) and 0.5 µM (0.77 mg/l) were obtained, respectively. The molecule was active after ingestion by the larvae and caused irreversible, lethal damage to the midgut and caecal epithelia. The amphiphilic nature of C14 allowed a formulate to be produced that not only was as active against the larvae as C14 in solution, but also possessed a residual activity of at least two weeks, in laboratory conditions.ConclusionsThe meso-substituted synthetic porphyrin C14, thanks to its photo-sensitizing properties represents an attractive candidate for the development of novel photolarvicides for dengue vector control.

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“…albopictus arises out of the similarities in their biology and ecology. Both species of Aedes mosquitoes breed in artificial containers of different materials and origins (MEDRONHO et al 2009, BURKE et al 2010, which are, in many instances linked with household disposables (BANERJEE et al 2013b(BANERJEE et al , 2015. The development of the larval stages is greatly dependent on the resource content in these containers and can act as a limiting factor during overcrowded conditions.…”

Section: Discussionmentioning

confidence: 99%

Effect of food types on competitive interaction between Aedes aegypti (LINNAEUS, 1762) and Ae. albopictus (SKUSE, 1894) (Diptera, Culicidae): a proximate level appraisal

Mohan¹,

Pramanik²,

Banerjee³

et al. 2017

Polish Journal of Entomology

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ABSTRACT. Competitive interactions between coexistingAedes aegypti and Ae. albopictus have been implied as a crucial factor shaping life history traits and population characteristics. The overlap in resource requirements and similarities in the life history strategies of the two Aedes mosquitoes form a basis for competitive interactions. In the present study, the role of the food quality of the larval habitats in influencing the outcome of competition between Ae. aegypti and Ae. albopictus is evaluated to highlight food quality as a basis for asymmetric competitive outcomes. Instar I larvae of the two mosquitoes were reared using conspecifics or heterospecifics of constant size and equal ratio with four different food types: boiled rice, boiled pulses, a mixture of boiled rice and pulses, and fish food. Competitive interactions were evaluated using age at pupation (AP), pupal weight (PW), dry adult weight (AW) and wing length (WL) with respect to intra-and interspecific competition for the two sexes of each mosquito species. The results show that Ae. albopictus developed faster but achieved a smaller size compared to Ae. aegypti under interspecific competition conditions, the extent of the difference varying significantly with the food type. Given the variety of food resources available in the small container larval habitats, the results of the study imply that food quality may act differentially with respect to larval development and adult body size, depending on the conspecifics or heterospecifics and on the sex of the species concerned. The dominance of one species over the other may also be a consequence of the resource utilization pattern that varies in the larval habitats.

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Aedes aegypti Immature Forms Distribution According to Type of Breeding Site

Cited by 34 publications

References 11 publications

Influence of water replacement on Diflubenzuron duration effect in the control of Aedes aegypti in simulated field conditions, in Northeastern Brazil

Influence of water replacement on Diflubenzuron duration effect in the control of Aedes aegypti in simulated field conditions, in Northeastern Brazil

Novel, Meso-Substituted Cationic Porphyrin Molecule for Photo-Mediated Larval Control of the Dengue Vector Aedes aegypti

Effect of food types on competitive interaction between Aedes aegypti (LINNAEUS, 1762) and Ae. albopictus (SKUSE, 1894) (Diptera, Culicidae): a proximate level appraisal

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