Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Search Results: 1 - 10 of 567 matches for " anopheles "
All listed articles are free for downloading (OA Articles)
Page 1 /567
Display every page Item
Novos encontros de anofelíneos em recipientes artificiais
Forattini,Oswaldo Paulo; Kakitani,Iná; Marques,Gisela Rita Alvarenga Monteiro; Brito,Marylene de;
Revista de Saúde Pública , 1998, DOI: 10.1590/S0034-89101998000600015
Abstract: new findings of anopheles mosquitoes in artificial containers are reported. in one, a plastic container served as a breeding place for anopheles bellator larvae and, in another, four instar larvae of an. albitarsis s.l. were found in an abandoned toilet basin. reflections are offered as to the selective pressure represented by the production, of an ever increasing scale, of disposable objects.
Novos encontros de anofelíneos em recipientes artificiais
Forattini Oswaldo Paulo,Kakitani Iná,Marques Gisela Rita Alvarenga Monteiro,Brito Marylene de
Revista de Saúde Pública , 1998,
Abstract: Assinalam-se novos encontros de anofelíneos em recipientes artificiais. Um deles diz respeito a formas imaturas de Anopheles bellator em criadouros experimentais e outro é concernente ao achado de An. albitarsis l.s., em recipiente abandonado. Tecem-se considera es sobre a press o seletiva representada pela produ o, cada vez maior, de objetos descartáveis.
Estudo de anofelinos antropofílicos peridomiciliares da Praia da Saudade na Ilha de Cotijuba: uma área endêmica de malária em Belém, Pará
Mascarenhas, Bento Melo;Guimar?es, Delma Gomes;Brígida, Manuel Santa;Pinto, Claudeth Souza;Gomes Neto, Henrique Andrade;Pereira, Júlia Daniele Braga;
Acta Amazonica , 2009, DOI: 10.1590/S0044-59672009000200026
Abstract: the island of cotijuba is located at 29km of belém, pará, brazil. this island is of approximately 60 km2 and belongs to the marajó archipelago. cotijuba has reported repeated outbreaks of malaria during past years, especially in the months of april and may. due to these outbreaks our interest focused on knowing the anopheline vectors in the island. from 2002 to 2004, periodic mosquito collections were made using human bait at landing and manual capture of resting specimens in the indoors and in the peridomicile. six bi-monthly collections of 6 hours duration revealed only two man-attracted species: anopheles (nyssorhynchus) aquasalis and anopheles (anopheles) intermedius. among other factors, climatic conditions, resident′s behavior and lack of resources for control measures contributed to the persistence of malaria in the island of cotijuba.
Incrimination of Anopheles (Nyssorhynchus) rangeli and An. (Nys.) oswaldoi as natural vectors of Plasmodium vivax in Southern Colombia
Qui?ones, Martha L;Ruiz, Freddy;Calle, David A;Harbach, Ralph E;Erazo, Holmes F;Linton, Yvonne-Marie;
Memórias do Instituto Oswaldo Cruz , 2006, DOI: 10.1590/S0074-02762006000600007
Abstract: malaria transmission in the southern colombian state of putumayo continues despite the absence of traditional vector species, except for the presence of anopheles darlingi near the southeastern border with the state of amazonas. in order to facilitate malaria vector incrimination in putumayo, 2445 morphologically identified anopheles females were tested for natural infection of plasmodium vivax by elisa. specimens tested included an. apicimacula (n = 2), an. benarrochi b (n = 1617), an. darlingi (n = 29), an. mattogrossensis (n = 7), an. neomaculipalpus (n = 7), an. oswaldoi (n = 362), an. peryassui (n = 1), an. punctimacula (n = 1), an. rangeli (n = 413), and an. triannulatus (n = 6). despite being overwhelmingly the most anthropophilic species in the region and comprising 66.1% of the mosquitoes tested, an. benarrochi b was not shown to be a vector. thirty-five an. rangeli and one an. oswaldoi were naturally infected with p. vivax vk210. sequence data were generated for the nuclear second internal transcriber space region of 31 of these 36 vivax positive mosquitoes (86.1%) to confirm their morphological identification. an. oswaldoi is known to be a species complex in latin america, but its internal taxonomy remains unresolved. herein we show that the an. oswaldoi found in the state of putumayo is genetically similar to specimens from the state of amapá in brazil and from the ocama region in the state of amazonas in venezuela, and that this form harbors natural infections of p. vivax. that an. rangeli and this member of the an. oswaldoi complex are incriminated as malaria vectors in putumayo, is a novel finding of significance for malaria control in southern colombia, and possibly in other areas of latin america.
Distribui??o vertical e sazonal de Anopheles (Kerteszia) em Ilha Comprida, SP
Ueno,Helene Mariko; Forattini,Oswaldo Paulo; Kakitani,Ina;
Revista de Saúde Pública , 2007, DOI: 10.1590/S0034-89102007000200014
Abstract: objective: anopheles bellator e an. cruzii are vectors of the so-called bromeliad-malaria, typical of conserved areas. the objective was to evaluate the seasonal and vertical distribution of these anophelines, aiming at assessing the risk of malaria transmission. methods: in the municipality of ilha comprida, southeastern brazil, cdc light traps baited with dry ice were placed fortnightly from 17:00 to 20:00, at one, six and 12 meters high from september 2001 to september 2002. association between an. bellator and an. cruzii densities and weather were assessed by spearman coefficient and comparisons among heights and species densities were made by mann-whitney non-parametric test. results: a total of 55,226 mosquitoes were caught: 1,341 were an. bellator (2.4% of culicidae), 278 at one meter, 261 at six meter and 802 at 12m high. following the same sequence, an. cruzii was represented by 452, 1,032 and 4,420 adults, totalizing 5,904 mosquitoes (10.7%). there was a positive correlation between densities of both species and daily maximum temperature, and between density of an. bellator and thermal amplitude. the densities were higher for both species at tree canopy. at the three levels, the density of an. cruzii was higher. conclusions: the acrodendrophilic behavior of these species was confirmed, remarkably in an. cruzii. after aggressive measures of control, these anophelines have remained in this region, but they are not under entomological surveillance. the persistent transmission of malaria and increasing tourism activities in this region highlight the need for surveillance of these species.
Dosis diagnósticas para vigilar la resistencia a insecticidas de los vectores de malaria en Colombia
Revista Colombiana de Entomología , 2010,
Abstract: the control of mosquito vectors of malaria is largely based on insecticide applications, either on the inside walls of dwellings or on treated nets. for that reason, the surveillance of insecticide resistance in these species is essential for the definition of plans and strategies of malaria control. the purpose of this study was to determine the diagnostic doses of several insecticides used in public health for the main vectors of malaria in colombia: anopheles darlingi, a. albimanus and a. nuneztovari, using the methodology of impregnated bottles developed by the centers for disease control and prevention. natural populations of the three species, submitted to low or no insecticide pressure, were selected with which bioassays were conducted to determine baseline susceptibility. diagnostic doses (insecticide concentration and diagnostic time), or saturation curves, were established for the insecticides lambda-cyhalothrin, deltamethrin, fenitrothion, malathion and ddt for the three vectors; cyfluthrin, permethrin and propoxur for a. albimanus and a. darlingi, and etofenprox and bendiocarb for a. darlingi. the diagnostic doses determined in these susceptible populations will allow an evaluation of the status of insecticide resistance of the main malaria vectors across their distribution in colombia, strengthening the resistance surveillance system and facilitating decision making for a more appropriate use of insecticides to control malaria in the country.
Human exposure to anopheline mosquitoes occurs primarily indoors, even for users of insecticide-treated nets in Luangwa Valley, South-east Zambia
Aklilu Seyoum, Chadwick H Sikaala, Javan Chanda, Dingani Chinula, Alex J Ntamatungiro, Moonga Hawela, John M Miller, Tanya L Russell, Olivier JT Bri?t, Gerry F Killeen
Parasites & Vectors , 2012, DOI: 10.1186/1756-3305-5-101
Abstract: Mosquitoes were collected by human landing catch in blocks of houses with either combined use of deltamethrin-based IRS and LLINs or LLINs alone. Human behaviour data were collected to estimate how much exposure to mosquito bites indoors and outdoors occurred at various times of the night for LLIN users and non-users.Anopheles funestus and An. quadriannulatus did not show preference to bite either indoors or outdoors: the proportions [95% confidence interval] caught indoors were 0.586 [0.303, 0.821] and 0.624 [0.324, 0.852], respectively. However, the overwhelming majority of both species were caught at times when most people are indoors. The proportion of mosquitoes caught at a time when most people are indoors were 0.981 [0.881, 0.997] and 0.897 [0.731, 0.965], respectively, so the proportion of human exposure to both species occuring indoors was high for individuals lacking LLINs (An. funestus: 0.983 and An. quadriannulatus: 0.970, respectively). While LLIN users were better protected, more than half of their exposure was nevertheless estimated to occur indoors (An. funestus: 0.570 and An. quadriannulatus: 0.584).The proportion of human exposure to both An. funestus and An. quadriannulatus occuring indoors was high in the area and hence both species might be responsive to further peri-domestic measures if these mosquitoes are susceptible to insecticidal products.
Mosquito Anthropophily: implications on malaria transmission in the northern Brazilian Amazon
Barros, Fábio S M;Honório, Nildimar A;Arruda, Mércia E;
Neotropical Entomology , 2010, DOI: 10.1590/S1519-566X2010000600029
Abstract: seasonal variation of adults and larvae of anophelines was studied during 2003 and 2004 in roraima state, located in the northern region of brazilian amazon. species diversity increased with distance of capture to human dwellings. greater diversity was found in extradomiciliary collections than in peridomiciliary or intradomiciliary. a significant association between anopheles darlingi root and an. albitarsis (s.l.) arribálzaga (diptera: culicidae) breeding sites and the proximity to human dwellings was observed. malaria sporozoite antigen panel assay (vectesttm malaria) indicated an. albitarsis s.l. as one of the local vectors in the studied area. in this study, an index to describe the anthropophilic behavior of each anopheline species is proposed.
Variability and genetic differentiation among Anopheles (Ano.) intermedius Chagas, 1908 and Anopheles (Ano.) mattogrossensis Lutz & Neiva, 1911 (Diptera: Culicidae) from the Brazilian Amazon
Santos, Joselita Maria Mendes dos;Rodriguez, Gloria Alicia Diaz;Maia, Juracy de Freitas;Tadei, Wanderli Pedro;
Memórias do Instituto Oswaldo Cruz , 2005, DOI: 10.1590/S0074-02762005000600006
Abstract: anopheles (anopheles) intermedius and anopheles (ano.) mattogrossensis are brazilian anopheline species belonging to the scarcely studied anopheles subgenus. few studies have been done on the genetic differentiation of these species. both species have been found infected by plasmodium and are sympatric with other anopheline species from the nyssorhynchus subgenus. eighteen enzymatic loci were analyzed in larval specimens of an. intermedius and an. mattogrossensis aiming to estimate the variability and genetic differentiation between these species. an. mattogrossensis population showed higher genetic variability (p = 44.4 and ho = 0.081 ± 0.031) than that of an. intermedius (p = 33.3 and ho = 0.048 ± 0.021). most analyzed loci showed genotypic frequencies according to hardy-weinberg equilibrium, except for lap1 and lap2 in an. intermedius, and est1 and pgm loci in an. mattogrossensis. the genetic distance between these species (d = 0.683) was consistent with the inter-specific values reported for anopheles subgenus. we verified that the polymorphism and heterozygosity percentile values found in both species and compared to those in the literature, showed no relation between the level of isozyme variability and geographical distribution. the low variability found in these two species is probably more related to the niche they occupy than to their geographic distribution.
The polytene chromosomes of the mosquito Anopheles bellator compared with those of Anopheles cruzii
Ramirez, Corolla C.L.;Dessen, Eliana M.B.;
Brazilian Journal of Genetics , 1996, DOI: 10.1590/S0100-84551996000400003
Abstract: a photographic map was made of polytene chromosomes of ovarian nurse cells of anopheles bellator females. the chromosomes of this species have complete or partial homology with those of a. cruzii, mainly in the telomeric and centromeric regions. variability at the single band level was observed as asymmetric bands at seven different positions. one inversion (3ra) was detected in the 3r arm.
Page 1 /567
Display every page Item

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