Modelo Entomológico Determinístico sob Efeito da Pluviosidade para o Aedes aegypti e o Aedes albopictus

Silva, Lillia dos Santos Barsante; Cardoso, Rodrigo T. N.; Fernandes, José Sebastião Cunha; Silva, Carlos Alexandre; Eiras, Álvaro Eduardo

doi:10.5540/tema.2018.019.02.289

Cited by 6 publications

(9 citation statements)

References 10 publications

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“…The number of eggs per positive paddle was similar between both seasons studied, and no influence of accumulated rainfall on the number of eggs on positive paddles was observed. The data provided do not corroborate those reported in literature, where the oviposition process has been usually shown to be dependent directly on breeding site availability (Stein et al 2005, Silva et al 2018). During the dry season, there tends to be a scarcity of larval habitats with decreased rain, leading females to perform complete oviposition in one single container or just a few, which explains the fact that the number of eggs per paddle is usually higher during this period.…”

Section: Discussioncontrasting

confidence: 99%

“…albopictus populations) observed in the BMA has been demonstrated in other studies. Silva et al (2018), using an entomological model, showed a higher proportion of positive traps related to greater precipitation. However, a negative influence of rainfall on the frequency of positive larval sites has also been shown, with the loss of immature individuals during heavy rains due to a larval site overflow (Urbinatti et al 2007).…”

Section: Discussionmentioning

confidence: 99%

“…Also, increased rain suspended egg diapause, which is observed during the drier seasons, further contributing to the increase in the Ae. albopictus population (Silva et al 2018).…”

Section: Discussionmentioning

confidence: 99%

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Distribution and preference for oviposition sites of Aedes albopictus (Skuse) in the metropolitan area of Belém, in the Brazilian Amazon

Soares

Rosário

Silva

2020

Journal of Vector Ecology

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The mosquito Aedes albopictus is a vector of several arboviruses transmitted to humans. They have a sylvatic behavior, occurring in rural areas. However, reports of their adaptation to anthropic environments have been increasing. The aim of this study is to investigate the presence and distribution of Ae. albopictus in the Metropolitan Region of Belém in the Brazilian Amazon and evaluate its preference for either natural or artificial breeding sites under the weather conditions of the Amazon. Ovitraps (artificial breeding sites) and bamboo internodes (natural breeding sites) were deployed in neighborhood peridomiciles during the dry and rainy seasons. The results showed that the presence of Ae. albopictus was recorded in 71.4% of the neighborhoods during the dry season and in 69.2% neighborhoods during the rainy season, thus indicating a wide distribution in the region. A significant increase in the frequency of the capture of mosquitoes in areas with higher vegetation cover was observed during the dry season (R2 = 0.2995; p=0.018) but not during the rainy season (R2 = 0.044; p=0.43). Comparing the weekly frequency of Ae. albopictus on positive bamboos and OVT, no significant difference was observed between them (t= 0.559; df= 23; p=0.58). A significant increase in the number of positive breeding sites was observed with increased rainfall for both bamboo (R2 = 0.33; p= 0.002) and OVT (R2 = 0.24; p= 0.013). This is the first report of Ae. albopictus in the metropolitan area of Belém. The findings suggest a wide distribution in the studied area, preferably in areas with more extensive vegetation cover. Additionally, the mosquito population showed the ability to use both natural and artificial habitats.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Distribution and preference for oviposition sites of Aedes albopictus (Skuse) in the metropolitan area of Belém, in the Brazilian Amazon

Soares

Rosário

Silva

2020

Journal of Vector Ecology

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“…In the cases of rates of development, outside the roots of the polynomials, the values in the model are fixed to zero, although it never happens in the present range of data. The system (3.1) is non-autonomous because it has coefficients dependent on rainfall and temperature which, in turn, depend o time [20]. However the temperature and precipitation data is updated only weekly and the time evolution is hourly.…”

Section: Mathematical Modelmentioning

confidence: 99%

A Model for Aedes aegypti Infestation According to Meteorological Variables: case of Caratinga (Minas Gerais - Brazil)

Cordeiro

Eiras²,

Silva³

et al. 2021

TEMA

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Aedes aegypti mosquitoes are the vector of diseases such as dengue, zika, chikungunya, and yellow fever among others. All the stages of development, eggs, larvae, pupa, and the adult of the species have its population modulated by meteorological variables, such as precipitation and temperature through affecting the productivity of breeding sites, metabolic processes, and others. Since adult females are responsible for transmitting the virus, the population of females becomes a direct indicator of the risk of infection. For this reason, some ongoing vector surveillance programs are based on adult female capture. In turn, all the stages of development have its population modulated by meteorological variables, such as precipitation and temperature, through productivity of breeding sites, metabolic processes and others. In this work, field data of capture of females was used to evaluate if a population dynamics model of Aedes aegypti under the effect of weather would be able to forecast field population. The nonlinear dynamic system model comprises: (1) four equations for the populations of the stages of development of the mosquito, designed for the ongoing surveillance program; (2) parametric dependencies of the rates of development on mean temperature and weekly accumulated precipitation. The dependencies on temperature and precipitation are modelled with aim of simplicity with the fewer number of parameters as possible. Temperature dependence is modelled based on values of the related literature under the assumption of existence of a optimum temperature for the rates, getting worse for extreme temperatures. The dependence on precipitation which is barely treated in experiments is modelled under the assumption of a monotonic dependence described by a power law with values estimated in orders of magnitude from data in the literature. By comparison with field data of an entomological indicator based on the number of Ae. aegypti females captured by a public health program in the city of Caratinga (Minas Gerais, Brazil), the model showed a significant correlation (R = 0.75). The result shows that the approach, if refined, can provide forecasting for of the population size.

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“…Among the arboviruses that are difficult to control is dengue, one of the main public health problems in the world, being transmitted by Aedes aegypti. Accelerated growth was also reported in cases of other diseases from Aedes aegypti, such as Zika and Chikungunya (Silva et al, 2018). It is noteworthy that even with technological advances in the search for vaccines for these diseases, only for yellow fever there is a long-term vaccine, approximately 10 years (Rothman, 2004).…”

Section: Introductionmentioning

confidence: 96%

Larvicidal activity of microparticles of Melissa officinalis L. essential oil (Lamiaceae) against Aedes aegypti (Diptera, Culicidae)

Martins

Rosa

Arruda

et al. 2021

RSD

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This study aimed to evaluate the larvicidal activity of essential oil microparticles (EO) of Melissa officinalis L. against Aedes aegypti. The leaves of M. officinalis were collected in the municipality of São José de Ribamar, Maranhão, Brazil, later dried, crushed and ground. 90g of the dried leaves were used to obtain the EO by the hydrodistillation method. For the synthesis of microencapsulated EO, 60g of sodium alginate (2.5% m/v) was added to the mixture of 15g of Tween 20 with 6g of EO. The mixture was homogenized and drips over CaCl2 5% m/v solution for the hardening of particles via crosslinking. The microparticles were washed with distilled water in filter and dried at 35ºC/24h and 15 days at tamb (30ºC). The eggs of Aedes aegypti were collected at the Federal University of Maranhão by the ovitrampas method. The larvae that hatched were fed until they reached the fourth instar. Groups of larvae (n=20) were submitted to solutions of EO and microparticles of 10-90 mg/L . After 24 h, live and dead larvae were counted and LC50 was calculated by the Reed&Muench method, using Cheng's criterion for classification of active potential. All larvae presented mortality in all concentrations tested. The LC50 obtained for the EO was 40.60 mg/L and for the microparticles 22.10 mg/L, both classified as active according to the adopted criterion, but it is observed that the microparticles increased the larvicidal potential of the EO. Through the results obtained, it is concluded that the microparticles formulated with the EO proved to be efficient in the face of the larvae of Aedes aegypti, being interesting and important in controlling and combating the mosquito that transmits dengue.

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Modelo Entomológico Determinístico sob Efeito da Pluviosidade para o Aedes aegypti e o Aedes albopictus

Cited by 6 publications

References 10 publications

Distribution and preference for oviposition sites of Aedes albopictus (Skuse) in the metropolitan area of Belém, in the Brazilian Amazon

Distribution and preference for oviposition sites of Aedes albopictus (Skuse) in the metropolitan area of Belém, in the Brazilian Amazon

A Model for Aedes aegypti Infestation According to Meteorological Variables: case of Caratinga (Minas Gerais - Brazil)

Larvicidal activity of microparticles of Melissa officinalis L. essential oil (Lamiaceae) against Aedes aegypti (Diptera, Culicidae)

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