oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

4 ( 1 )

3 ( 1 )

2019 ( 67 )

2018 ( 405 )

Custom range...

Search Results: 1 - 10 of 229836 matches for " Melo-Santos Maria Alice V "
All listed articles are free for downloading (OA Articles)
Page 1 /229836
Display every page Item
The use of bacterial larvicides in mosquito and black fly control programmes in Brazil
Regis, Lêda;Silva, Sinara B da;Melo-Santos, Maria Alice V;
Memórias do Instituto Oswaldo Cruz , 2000, DOI: 10.1590/S0074-02762000000700035
Abstract: bacillus spp. based larvides are increasingly replacing, with numerous advantages, chemical insecticides in programmes for controlling black fly and mosquito populations. brazil was among the pioneers in adopting bacillus thuringiensis israelensis (b.t.i) to control black flies. however, the major current mosquito control programme in brazil, the programme for eradication of aedes aegypti launched in 1997, only recently decided to replace temephos by b.t.i based larvicides, in the state of rio de janeiro. in the last decade, works developed by research groups in brazilian institutions have generated a significant contribution to this subject through the isolation of b. sphaericus new strains, the development of new products and the implementation of field trials of bacillus efficacy against mosquito species under different environmental conditions.
The use of bacterial larvicides in mosquito and black fly control programmes in Brazil
Regis Lêda,Silva Sinara B da,Melo-Santos Maria Alice V
Memórias do Instituto Oswaldo Cruz , 2000,
Abstract: Bacillus spp. based larvides are increasingly replacing, with numerous advantages, chemical insecticides in programmes for controlling black fly and mosquito populations. Brazil was among the pioneers in adopting Bacillus thuringiensis israelensis (B.t.i) to control black flies. However, the major current mosquito control programme in Brazil, the Programme for Eradication of Aedes aegypti launched in 1997, only recently decided to replace temephos by B.t.i based larvicides, in the State of Rio de Janeiro. In the last decade, works developed by research groups in Brazilian institutions have generated a significant contribution to this subject through the isolation of B. sphaericus new strains, the development of new products and the implementation of field trials of Bacillus efficacy against mosquito species under different environmental conditions.
Primeiro registro de Aedes albopictus em área da Mata Atlantica, Recife, PE, Brasil
Albuquerque Cleide MR de,Melo-Santos Maria Alice V,Bezerra Mary Ann S,Barbosa Rosangela MR
Revista de Saúde Pública , 2000,
Abstract: Pela primeira vez é registrada a presen a do Aedes albopictus em remanescentes de Mata Atlantica, localizada em área urbana em Recife (Pernambuco, Brasil). As coletas foram realizadas em isca humana e em criadouros de formas jovens (ocos de árvores, bambus, bromélias e pneu). A presen a de Ae. albopictus na regi o metropolitana do Recife representa um risco potencial do inter-relacionamento dessa espécie de mosquito com a popula o.
Primeiro registro de Aedes albopictus em área da Mata Atlantica, Recife, PE, Brasil
Albuquerque,Cleide MR de; Melo-Santos,Maria Alice V; Bezerra,Mary Ann S; Barbosa,Rosangela MR; Silva,Dílvia F; Silva,Edinalda da;
Revista de Saúde Pública , 2000, DOI: 10.1590/S0034-89102000000300017
Abstract: this is the first report of the presence of aedes albopictus in the native rain forest, near the urban area of recife (state of pernambuco, brazil). adult female mosquitoes were collected using human bait. mosquitoes in aquatic stages were looked for in treeholes, bamboos, bromeliads and old tires. the existence of ae. albopictus in the metropolitan area of recife poses a potential risk for the interaction of this mosquito species with the urban human population.
An entomological surveillance system based on open spatial information for participative dengue control
Regis, Leda;Souza, Wayner V.;Furtado, André F.;Fonseca, Cláudio D.;Silveira Jr., José C.;Ribeiro Jr., Paulo J.;Melo-Santos, Maria Alice V.;Carvalho, Marilia S.;Monteiro, Antonio M.V.;
Anais da Academia Brasileira de Ciências , 2009, DOI: 10.1590/S0001-37652009000400004
Abstract: aedes aegypti is a very efficient disseminator of human pathogens. this condition is the result of evolutionary adaptations to frequent haematophagy, as well as to the colonization of countless types of habitats associated with environmental and cultural factors that favor the proliferation of this mosquito in urban ecosystems. studies using sensitive methods of monitoring demonstrate that the methods of surveillance used in the brazilian program do not show the high degrees of the infestation of cities by this vector. to increase the capacity of the health sector, new tools are needed to the practice of surveillance, which incorporate aspects of the vector, place and human population. we describe here the smcp-aedes - monitoring system and population control of aedes aegypti, aiming to provide an entomological surveillance framework as a basis for epidemiological surveillance of dengue. the smcp-aedes is uphold in the space technology information, supported by the intensive use of the web and free software to collect, store, analyze and disseminate information on the spatial-temporal distribution of the estimated density for the population of aedes, based on data systematically collected with the use of ovitraps. planned control interventions, intensified where and when indicated by the entomological surveillance, are agreed with the communities, relying on the permanent social mobilization.
Evaluation of a sticky trap (AedesTraP), made from disposable plastic bottles, as a monitoring tool for Aedes aegypti populations
de Santos Eloína Maria,de Melo-Santos Maria Alice,de Oliveira Claudia Maria,Correia Juliana
Parasites & Vectors , 2012, DOI: 10.1186/1756-3305-5-195
Abstract: Background Dengue virus, which is transmitted by Aedes aegypti mosquitoes is the most important emerging viral disease, infecting more than 50 million people annually. Currently used sticky traps are useful tools for monitoring and control of A. aegypti, despite differences in efficiency, labor requirements and cost. In the present work, a field assay was carried out to evaluate the performance of a sticky trap (AedesTrap), produced using disposable material, in capturing gravid Aedes spp. females. Additionally, conditions necessary for the improved performance of the device, such as number of traps per site and location (indoors or outdoors) were evaluated. Methods During a one year period, traps were placed in a dengue endemic area in 28 day cycles. The trap, named AedesTrap, consisted of a disposable plastic soda bottle coated inside with colophony resin, which served as a sticky substrate. Disposable bottles were donated by restaurants, and traps were made by laboratory staff, reducing the cost of the sticky trap (less than U$3). Mosquito capture in indoor and outdoor areas was compared by placing the traps in laundry room, kitchen or bedroom (indoors) and front or back yard (outdoors). The relationship between the number of AedesTraps and quantity of captured mosquitoes was investigated by utilizing one or three traps/site. Results During a 28 day cycle, a single AedesTrap was capable of capturing up to 15 A. aegypti in a house, with a mean capture of 0.5 to 2.63 females per premise. The AedesTrap collected three times more outdoors versus indoors. Similarly, the capability of detecting Aedes spp. infestation, and of capturing females, was three times higher when using three AedesTraps per house, compared with one trap per house. Conclusions AedesTrap was shown to be capable of capturing A. aegypti and other culicidae, providing information on the adult mosquito population, and allowing the identification of areas critically infested by mosquitoes. Low requirements for skilled labor together with easy maintenance and low cost are additional advantages of using this sticky trap.
Evaluation of a new tablet formulation based on Bacillus thuringiensis sorovar. israelensis for larvicidal control of Aedes aegypti
Melo-Santos, Maria Alice Varjal de;Sanches, Elizabeth Gomes;Jesus, Fernando Justino de;Regis, Lêda;
Memórias do Instituto Oswaldo Cruz , 2001, DOI: 10.1590/S0074-02762001000600020
Abstract: the effect of sunlight on the efficacy and persistence of an experimental tablet formulation based on bacillus thuringiensis sorovar. israelensis (c4p1) was evaluated against aedes aegypti larvae under simulated field conditions. the initial mortality ranged from 93 to 100%, and the residual activity (3 70% mortality) recorded in containers exposed to sunlight or shade were, respectively, 13-35 days and 40-54 days. the results suggest that c4p1 can provide long-term larvicidal effect and operational advantages.
Evaluation of a new tablet formulation based on Bacillus thuringiensis sorovar. israelensis for larvicidal control of Aedes aegypti
Melo-Santos Maria Alice Varjal de,Sanches Elizabeth Gomes,Jesus Fernando Justino de,Regis Lêda
Memórias do Instituto Oswaldo Cruz , 2001,
Abstract: The effect of sunlight on the efficacy and persistence of an experimental tablet formulation based on Bacillus thuringiensis sorovar. israelensis (C4P1) was evaluated against Aedes aegypti larvae under simulated field conditions. The initial mortality ranged from 93 to 100%, and the residual activity ( > or = 70% mortality) recorded in containers exposed to sunlight or shade were, respectively, 13-35 days and 40-54 days. The results suggest that C4P1 can provide long-term larvicidal effect and operational advantages.
Developing new approaches for detecting and preventing Aedes aegypti population outbreaks: basis for surveillance, alert and control system
Regis, Lêda;Monteiro, Antonio Miguel;Melo-Santos, Maria Alice Varjal de;Silveira Jr, José Constantino;Furtado, André Freire;Acioli, Ridelane Veiga;Santos, Gleice Maria;Nakazawa, Mitsue;Carvalho, Marilia Sá;Ribeiro Jr, Paulo Justiniano;Souza, Wayner Vieira de;
Memórias do Instituto Oswaldo Cruz , 2008, DOI: 10.1590/S0074-02762008000100008
Abstract: a new approach to dengue vector surveillance based on permanent egg-collection using a modified ovitrap and bacillus thuringiensis israelensis(bti) was evaluated in different urban landscapes in recife, northeast brazil. from april 2004 to april 2005, 13 egg-collection cycles of four weeks were carried out. geo-referenced ovitraps containing grass infusion, bti and three paddles were placed at fixed sampling stations distributed over five selected sites. continuous egg-collections yielded more than four million eggs laid into 464 sentinel-ovitraps over one year. the overall positive ovitrap index was 98.5% (over 5,616 trap observations). the egg density index ranged from 100 to 2,500 eggs per trap-cycle, indicating a wide spread and high density of aedes aegypti (diptera: culicidae) breeding populations in all sites. fluctuations in population density over time were observed, particularly a marked increase from january on, or later, according to site. massive egg-collection carried out at one of the sites prevented such a population outbreak. at intra-site level, egg counts made it possible to identify spots where the vector population is consistently concentrated over the time, pinpointing areas that should be considered high priority for control activities. the results indicate that these could be promising strategies for detecting and preventing ae. aegypti population outbreaks.
Expression Profile of Genes during Resistance Reversal in a Temephos Selected Strain of the Dengue Vector, Aedes aegypti
Clare Strode, Maria de Melo-Santos, Tereza Magalh?es, Ana Araújo, Contancia Ayres
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0039439
Abstract: Background The mosquito Aedes aegypti is one of the most important disease vectors because it transmits two major arboviruses, dengue and yellow fever, which cause significant global morbidity and mortality. Chemical insecticides form the cornerstone of vector control. The organophosphate temephos a larvicide recommended by WHO for controlling Ae. aegypti, however, resistance to this compound has been reported in many countries, including Brazil. Methodology/Principal Findings The aim of this study was to identify genes implicated in metabolic resistance in an Ae. aegypti temephos resistant strain, named RecR, through microarray analysis. We utilized a custom ‘Ae. aegypti detox chip’ and validated microarray data through RT-PCR comparing susceptible and resistant individuals. In addition, we analyzed gene expression in 4th instar larvae from a reversed susceptible strain (RecRev), exposed and unexposed to temephos. The results obtained revealed a set of 13 and 6 genes significantly over expressed in resistant adult mosquitoes and larvae, respectively. One of these genes, the cytochrome P450 CYP6N12, was up-regulated in both stages. RT-PCR confirmed the microarray results and, additionally, showed no difference in gene expression between temephos exposed and unexposed RecRev mosquitoes. This suggested that the differences in the transcript profiles among the strains are heritable due to a selection process and are not caused by immediate insecticide exposure. Reversal of temephos resistance was demonstrated and, importantly, there was a positive correlation between a decrease in the resistance ratio and an accompanying decrease in the expression levels of previously over expressed genes. Some of the genes identified here have also been implicated in metabolic resistance in other mosquito species and insecticide resistant populations of Ae. aegypti. Conclusions/Significance The identification of gene expression signatures associated to insecticide resistance and their suppression could greatly aid the development of improved strategies of vector control.
Page 1 /229836
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.