| differential attraction of venezuelan anophelines to human collectors. | during a longitudinal study on vector biology and malaria transmission in western venezuela the degree of attraction of mosquitoes to 4 people who carried out landing catches was evaluated. an analysis of variance of the log(x + 1)-transformed data showed that there were no significant differences in attractiveness of various individuals to anopheles nuneztovari, anopheles marajoara, or anopheles triannulatus. | 1995 | 8825515 |
| bloodmeal hosts of anopheles species (diptera: culicidae) in a malaria-endemic area of the brazilian amazon. | hosts of blood-fed anophelines (diptera: culicidae) were determined in three riverine villages, 1.5-7.0 km apart, along the matapí river, amapá state, brazil, by enzyme-linked immunosorbent assay midgut analysis for igg of common vertebrates. anopheles marajoara galvão & damsceno and anopheles darlingi root had higher human blood indices (hbi) than anopheles nuneztovari gabaldón, anopheles triannulatus (neiva and pinto), and anopheles intermedius (chagas), which were relatively zoophilic. hbis o ... | 2006 | 17017232 |
| genetic structure of anopheles (nyssorhynchus) marajoara (diptera: culicidae) in colombia. | five anopheles marajoara galvão and damasceno populations, representing diverse ecological conditions, were sampled throughout colombia and analyzed using nine hypervariable dna microsatellite loci. the overall genetic diversity (h = 0.58) was lower than that determined for some brazilian populations using the same markers. the caquetá population (colombia) had the lowest gene diversity (h = 0.48), and it was the only population at hardy-weinberg equilibrium. hardy-weinberg disequilibrium in the ... | 2010 | 20810825 |
| identification of a fibrinogen-related protein (fbn9) gene in neotropical anopheline mosquitoes. | malaria has a devastating impact on worldwide public health in many tropical areas. studies on vector immunity are important for the overall understanding of the parasite-vector interaction and for the design of novel strategies to control malaria. a member of the fibrinogen-related protein family, fbn9, has been well studied in anopheles gambiae and has been shown to be an important component of the mosquito immune system. however, little is known about this gene in neotropical anopheline speci ... | 2011 | 21288344 |
| evidence of two lineages of the dengue vector aedes aegypti in the brazilian amazon, based on mitochondrial dna nd4 gene sequences. | genetic variation was estimated in ten samples populations of aedes aegypti from the brazilian amazon, by using a 380 bp fragment of the mitochocondrial nadh dehydrogenase subunit 4 (nd4) gene. a total of 123 individuals were analyzed, whereby 13 haplotypes were found. mean genetic diversity was slightly high (h = 0.666 ± 0.029; π = 0.0115 ± 0.0010). two amova analyses indicated that most of the variation (~70%-72%) occurred within populations. the variation found among and between populations w ... | 2009 | 21637700 |
| diversification of the genus anopheles and a neotropical clade from the late cretaceous. | the anopheles genus is a member of the culicidae family and consists of approximately 460 recognized species. the genus is composed of 7 subgenera with diverse geographical distributions. despite its huge medical importance, a consensus has not been reached on the phylogenetic relationships among anopheles subgenera. we assembled a comprehensive dataset comprising the coi, coii and 5.8s rrna genes and used maximum likelihood and bayesian inference to estimate the phylogeny and divergence times o ... | 2015 | 26244561 |
| cryptic species in the anopheles (nyssorhynchus) albitarsis (diptera: culicidae) complex: incongruence between random amplified polymorphic dna-polymerase chain reaction identification and analysis of mitochondrial dna coi gene sequences. | random amplified polymorphic dna (rapd) diagnostic bands are one tool used to differentiate cryptic mosquito species in the anopheles albitarsis complex. monophyly of four species (a. albitarsis lynch-arribálzaga, a. albitarsis b, a. deaneorum rosa-freitas, and a. marajoara galvão & damasceno) currently identified with the rapd technique was assessed using sequences of the cytochrome oxidase i (coi) mitochondrial dna (mtdna) gene. maximum parsimony, maximum likelihood, and bayesian analyses supp ... | 0 | 17082822 |
| an overview of malaria transmission from the perspective of amazon anopheles vectors. | in the americas, areas with a high risk of malaria transmission are mainly located in the amazon forest, which extends across nine countries. one keystone step to understanding the plasmodium life cycle in anopheles species from the amazon region is to obtain experimentally infected mosquito vectors. several attempts to colonise anopheles species have been conducted, but with only short-lived success or no success at all. in this review, we review the literature on malaria transmission from the ... | 2015 | 25742262 |
| is there an efficient trap or collection method for sampling anopheles darlingi and other malaria vectors that can describe the essential parameters affecting transmission dynamics as effectively as human landing catches? - a review. | distribution, abundance, feeding behaviour, host preference, parity status and human-biting and infection rates are among the medical entomological parameters evaluated when determining the vector capacity of mosquito species. to evaluate these parameters, mosquitoes must be collected using an appropriate method. malaria is primarily transmitted by anthropophilic and synanthropic anophelines. thus, collection methods must result in the identification of the anthropophilic species and efficiently ... | 0 | 25185008 |
| land cover, land use and malaria in the amazon: a systematic literature review of studies using remotely sensed data. | the nine countries sharing the amazon forest accounted for 89% of all malaria cases reported in the americas in 2008. remote sensing can help identify the environmental determinants of malaria transmission and their temporo-spatial evolution. seventeen studies characterizing land cover or land use features, and relating them to malaria in the amazon subregion, were identified. these were reviewed in order to improve the understanding of the land cover/use class roles in malaria transmission. the ... | 2013 | 23758827 |
| population dynamics, structure and behavior of anopheles darlingi in a rural settlement in the amazon rainforest of acre, brazil. | anopheles darlingi is the major vector of malaria in south america, and its behavior and distribution has epidemiological importance to biomedical research. in brazil, an. darlingi is found in the northern area of the amazon basin, where 99.5% of the disease is reported. | 2011 | 21702964 |
| a new mtdna coi gene lineage closely related to anopheles janconnae of the albitarsis complex in the caribbean region of colombia. | an understanding of the taxonomic status and vector distribution of anophelines is crucial in controlling malaria. previous phylogenetic analyses have supported the description of six species of the neotropical malaria vector anopheles (nyssorhynchus) albitarsis s.l. (diptera: culicidae): an. albitarsis, anopheles deaneorum, anopheles marajoara, anopheles oryzalimnetes, anopheles janconnae and an. albitarsis f. to evaluate the taxonomic status of an. albitarsis s.l. mosquitoes collected in vario ... | 0 | 21225199 |
| lineage divergence detected in the malaria vector anopheles marajoara (diptera: culicidae) in amazonian brazil. | cryptic species complexes are common among anophelines. previous phylogenetic analysis based on the complete mtdna coi gene sequences detected paraphyly in the neotropical malaria vector anopheles marajoara. the "folmer region" detects a single taxon using a 3% divergence threshold. | 2010 | 20929572 |
| a historical perspective on malaria control in brazil. | malaria has always been an important public health problem in brazil. the early history of brazilian malaria and its control was powered by colonisation by europeans and the forced relocation of africans as slaves. internal migration brought malaria to many regions in brazil where, given suitable anopheles mosquito vectors, it thrived. almost from the start, officials recognised the problem malaria presented to economic development, but early control efforts were hampered by still developing pub ... | 0 | 26517649 |
| malaria in south america: a drug discovery perspective. | the challenge of controlling and eventually eradicating malaria means that new tools are urgently needed. south america's role in this fight spans both ends of the research and development spectrum: both as a continent capable of discovering and developing new medicines, and also as a continent with significant numbers of malaria patients. this article reviews the contribution of groups in the south american continent to the research and development of new medicines over the last decade. therefo ... | 2013 | 23706107 |
| malaria vectors in south america: current and future scenarios. | malaria remains a significant public health issue in south america. future climate change may influence the distribution of the disease, which is dependent on the distribution of those anopheles mosquitoes competent to transmit plasmodium falciparum. herein, predictive niche models of the habitat suitability for p. falciparum, the current primary vector anopheles darlingi and nine other known and/or potential vector species of the neotropical albitarsis complex, were used to document the current ... | 2015 | 26283539 |
| ecological suitability and spatial distribution of five anopheles species in amazonian brazil. | seventy-six sites characterized in amazonian brazil revealed distinct habitat diversification by examining the environmental factors associated with the distribution and abundance of five anopheline species (diptera: culicidae) in the subgenus nyssorhynchus. these included three members of the albitarsis complex, anopheles oryzalimnetes, anopheles marajoara, anopheles janconnae; anopheles triannulatus, and anopheles goeldii. anopheles janconnae abundance had a positive correlation to water flow ... | 2013 | 23546804 |
| dna barcoding reveals both known and novel taxa in the albitarsis group (anopheles: nyssorhynchus) of neotropical malaria vectors. | mosquitoes belonging to the albitarsis group (anopheles: nyssorhynchus) are of importance as malaria vectors across the neotropics. the group currently comprises six known species, and recent studies have indicated further hidden biodiversity within the group. dna barcoding has been proposed as a highly useful tool for species recognition, although its discriminatory utility has not been verified in closely related taxa across a wide geographic distribution. | 2012 | 22353437 |
| nightly biting cycles of malaria vectors in a heterogeneous transmission area of eastern amazonian brazil. | the biting cycle of anopheline mosquitoes is an important component in the transmission of malaria. inter- and intraspecific biting patterns of anophelines have been investigated using the number of mosquitoes caught over time to compare general tendencies in host-seeking activity and cumulative catch. in this study, all-night biting catch data from 32 consecutive months of collections in three riverine villages were used to compare biting cycles of the five most abundant vector species using co ... | 2013 | 23890413 |
| epidemiological and entomological studies of a malaria outbreak among french armed forces deployed at illegal gold mining sites reveal new aspects of the disease's transmission in french guiana. | in december 2010, a plasmodium vivax malaria outbreak occurred among french forces involved in a mission to control illegal gold mining in french guiana. the findings of epidemiological and entomological investigations conducted after this outbreak are presented here. | 2016 | 26801629 |
| chemical variation in piper aduncum and biological properties of its dillapiole-rich essential oil. | the essential oils of the specimens of piper aduncum that occur in deforested areas of brazilian amazon, north brazil, are rich in dillapiole (35-90%), a derivative of phenylpropene, to which are attributed biological properties. on the other hand, the oils of the specimens with occurrence in the atlantic forest, and northeastern and southeastern brazil, do not contain dillapiole, but only terpene compounds such as (e)-nerolidol and linalool. one specimen existing in the amazon was hydrodistille ... | 2009 | 19774604 |
| hybrid sterility in crosses between two brazilian sibling species of the anopheles albitarsis complex. | complexes of cryptic species are common in several taxa and this is also the case in the anopheles genus, a group including all known human malaria vectors. the anopheles albitarsis complex comprises at least nine cryptic species, some of which are implicated as vectors of human malaria. several different types of data have been generated for this species complex such as cytogenetics, alloenzymes, morphological and feeding behavioral, hybridization experiments, rapd-pcr and rflp and mitochondria ... | 2014 | 25471342 |
| the effects of urbanization on global plasmodium vivax malaria transmission. | many recent studies have examined the impact of urbanization on plasmodium falciparum malaria endemicity and found a general trend of reduced transmission in urban areas. however, none has examined the effect of urbanization on plasmodium vivax malaria, which is the most widely distributed malaria species and can also cause severe clinical syndromes in humans. in this study, a set of 10,003 community-based p. vivax parasite rate (pvpr) surveys are used to explore the relationships between pvpr i ... | 2012 | 23217010 |
| mutations in the voltage-gated sodium channel gene of anophelines and their association with resistance to pyrethroids - a review. | constant and extensive use of chemical insecticides has created a selection pressure and favored resistance development in many insect species worldwide. one of the most important pyrethroid resistance mechanisms is classified as target site insensitivity, due to conformational changes in the target site that impair a proper binding of the insecticide molecule. the voltage-gated sodium channel (nav) is the target of pyrethroids and ddt insecticides, used to control insects of medical, agricultur ... | 2014 | 25292318 |
| genetic diversity of anopheles triannulatus s.l. (diptera: culicidae) from northwestern and southeastern colombia. | anopheles triannulatus s.l. is a species complex, however in colombia its taxonomic status is unclear. this study was conducted to understand the level of genetic differentiation or population structure of specimens of an. triannulatus s.l. from northwestern and southeastern colombia. cytochrome oxidase subunit i (coi) and internal transcribed spacer (its2) sequence analyses suggested high genetic differentiation between the nw and se populations. a tcs network and bayesian inference analysis ba ... | 2012 | 22949519 |
| phylogeography of the neotropical anopheles triannulatus complex (diptera: culicidae) supports deep structure and complex patterns. | the molecular phylogenetic relationships and population structure of the species of the anopheles triannulatus complex: anopheles triannulatus s.s., anopheles halophylus and the putative species anopheles triannulatus c were investigated. | 2013 | 23433428 |
| abundance, behavior and entomological inoculation rates of anthropophilic anophelines from a primary colombian malaria endemic area. | in colombia for several years, the urabá-bajo cauca and alto sinú region has registered the highest numbers of malaria cases in the country. malaria vector incrimination and the characterization of entomological parameters will allow for a better understanding of malaria transmission dynamics and the design of effective vector control strategies for this region. | 2013 | 23497535 |
| habitat suitability of anopheles vector species and association with human malaria in the atlantic forest in south-eastern brazil. | every year, autochthonous cases of plasmodium vivax malaria occur in low-endemicity areas of vale do ribeira in the south-eastern part of the atlantic forest, state of são paulo, where anopheles cruzii and anopheles bellator are considered the primary vectors. however, other species in the subgenus nyssorhynchus of anopheles (e.g., anopheles marajoara) are abundant and may participate in the dynamics of malarial transmission in that region. the objectives of the present study were to assess the ... | 2011 | 21881779 |
| the influence of mosquito resting behaviour and associated microclimate for malaria risk. | abstract: | 2011 | 21736735 |
| analysis of the evolutionary forces shaping mitochondrial genomes of a neotropical malaria vector complex. | many vectors of human malaria belong to complexes of morphologically indistinguishable cryptic species. here we report the analysis of the newly sequenced complete mitochondrial dna molecules from six recognized or putative species of one such group, the neotropical anopheles albitarsis complex. the molecular evolution of these genomes had been driven by purifying selection, particularly strongly acting on the rna genes. directional mutation pressure associated with the strand-asynchronous asymm ... | 2011 | 21241811 |
| the dominant anopheles vectors of human malaria in the americas: occurrence data, distribution maps and bionomic précis. | abstract: | 2010 | 20712879 |
| the anopheles albitarsis complex with the recognition of anopheles oryzalimnetes wilkerson and motoki, n. sp. and anopheles janconnae wilkerson and sallum, n. sp. (diptera: culicidae). | the anopheles (nyssorhynchus) albitarsis complex includes six species: an. albitarsis, anopheles oryzalimnetes wilkerson and motoki, n. sp., anopheles marajoara, anopheles deaneorum, anopheles janconnae wilkerson and sallum, n. sp. and an. albitarsis f. except for an. deaneorum, species of the complex are indistinguishable when only using morphology. the problematic distinction among species of the complex has made study of malaria transmission and ecology of an. albitarsis s.l. difficult. conse ... | 2009 | 19876554 |
| malaria entomological inoculation rates in gold mining areas of southern venezuela. | a longitudinal study of malaria vectors aiming to describe the intensity of transmission was carried out in five villages of southern venezuela between january 1999-april 2000. the man-biting, sporozoite and entomological inoculation rates (eir) were calculated based on 121 all-night collections of anophelines landing on humans, cdc light traps and ultra violet up-draft traps. a total of 6,027 female mosquitoes representing seven species were collected. the most abundant species were anopheles m ... | 2009 | 19820839 |
| abundance, biting behaviour and parous rate of anopheline mosquito species in relation to malaria incidence in gold-mining areas of southern venezuela. | a longitudinal entomological and epidemiological study was conducted in five localities of southern venezuela between january 1999 and april 2000 to determine the abundance, biting behaviour and parity of anopheline mosquitoes (diptera: culicidae) in relation to climate variables and malaria incidence. a total of 3685 female anopheline mosquitoes, representing six species, were collected. the most abundant species were anopheles marajoara galvão & damasceno (60.7%) and anopheles darlingi root (3 ... | 2007 | 18092972 |
| ecology of the malaria vector, anopheles (nyssorhynchus) marajoara galvão and damasceno in trinidad, west indies. | the taxonomy and ecology of wild-caught anopheles marajoara mosquitoes derived from rice fields in frederick settlement, trinidad, were studied in the laboratory using specimens identified with species-specific random amplified polymorphic dna (rapd) profiles and recently developed rdna its2 polymerase chain reaction methods. adults were collected using shannon traps and human bait in 2 houses over a 1-year period. all mosquitoes collected were taken to the laboratory, where they were identified ... | 2006 | 16646317 |
| biting activity and breeding sites of anopheles species in the municipality villavicencio, meta, colombia. | villavicencio, the capital city of the department of meta, colombia, is at high risk for the urbanization of malaria because of the region's ecological conditions, as well as the permanent presence of infected human populations arriving from rural areas. from august to november 2002 and in april 2003, anopheline collections were undertaken in the area. isofamilies were obtained from 331 wild females, which were then recorded according to their abundance as follows: anopheles marajoara, anopheles ... | 2005 | 16033120 |
| [parity and wind impact on the frequency of anopheles marajoara, são paulo, brazil]. | to evaluate the impact of wind velocity on the behavior of an. marajoara population and its parity. | 2003 | 12792676 |
| emergence of a new neotropical malaria vector facilitated by human migration and changes in land use. | in a region of northeastern amazonia, we find a species previously of minor importance, anopheles marajoara, to be the principal malaria vector. in a total of five collections during 1996-97 in three replicated sites near the city of macapá, amapá state, this species occurs in much greater abundance compared with the presumed vector anopheles darlingi. also, a significantly higher proportion of an. marajoara is infected with malaria parasites, determined by the elisa technique. this appears to b ... | 2002 | 12135261 |
| demographic history and population structure of anopheles pseudopunctipennis in argentina based on the mitochondrial coi gene. | anopheles pseudopunctipennis is an important malaria vector in the neotropical region and the only species involved in plasmodium transmission in the andean foothills. its wide geographical distribution in america, high preference for biting humans and capacity to rest inside dwellings after feeding, are attributes contributing to its vector status. previous reports have tried to elucidate its taxonomic status, distinguishing populations from north, central and south america. in the present stud ... | 2014 | 25189813 |
| [anopheles (díptera: culicidae) vectors of malaria in puerto carreño municipality, vichada, colombia]. | the study of the biological aspects of anopheles spp., strengthens the entomological surveillance. | 0 | 23235809 |
| local population structure of plasmodium: impact on malaria control and elimination. | regardless of the growing interest in detecting population structures in malarial parasites, there have been limited discussions on how to use this concept in control programmes. in such context, the effects of the parasite population structures will depend on interventions' spatial or temporal scales. this investigation explores the problem of identifying genetic markers, in this case microsatellites, to unveil plasmodium genetic structures that could affect decisions in the context of eliminat ... | 2012 | 23232077 |
| biodiversity can help prevent malaria outbreaks in tropical forests. | plasmodium vivax is a widely distributed, neglected parasite that can cause malaria and death in tropical areas. it is associated with an estimated 80-300 million cases of malaria worldwide. brazilian tropical rain forests encompass host- and vector-rich communities, in which two hypothetical mechanisms could play a role in the dynamics of malaria transmission. the first mechanism is the dilution effect caused by presence of wild warm-blooded animals, which can act as dead-end hosts to plasmodiu ... | 2013 | 23556023 |
| malaria on the guiana shield: a review of the situation in french guiana. | in a climate of growing concern that plasmodium falciparum may be developing a drug resistance to artemisinin derivatives in the guiana shield, this review details our current knowledge of malaria and control strategy in one part of the shield, french guiana. local epidemiology, test-treat-track strategy, the state of parasite drug resistance and vector control measures are summarised. current issues in terms of mobile populations and legislative limitations are also discussed. | 2014 | 25184998 |
| distinct population structure for co-occurring anopheles goeldii and anopheles triannulatus in amazonian brazil. | to evaluate whether environmental heterogeneity contributes to the genetic heterogeneity in anopheles triannulatus, larval habitat characteristics across the brazilian states of roraima and pará and genetic sequences were examined. a comparison with anopheles goeldii was utilised to determine whether high genetic diversity was unique to an. triannulatus. student t test and analysis of variance found no differences in habitat characteristics between the species. analysis of population structure o ... | 0 | 23903977 |
| genetic variability among anopheles species belonging to the nyssorhynchus and anopheles subgenera in the amazon region. | isoenzymatic analyses were performed involving species of the nyssorhynchus and anopheles subgenera in order to estimate the intra and interspecies genetic variability. | 2011 | 20802941 |
| anopheles darlingi and anopheles marajoara (diptera: culicidae) susceptibility to pyrethroids in an endemic area of the brazilian amazon. | this study aimed to evaluate the susceptibility of anopheles darlingi root (1926) and anopheles marajoara galvão & damasceno (1942) to pyrethroids used by the national malaria control program in brazil. | 2015 | 26676504 |
| intragenomic rdna its2 variation in the neotropical anopheles (nyssorhynchus) albitarsis complex (diptera: culicidae). | we cloned and sequenced the rdna internal transcribed spacer 2 (its2) of 4 species belonging to the neotropical anopheles (nyssorhynchus) albitarsis complex, that is, a. albitarsis; a. albitarsis b; anopheles marajoara, a proven malaria vector; and anopheles deaneorum, a suspected vector. even though the its2 sequences of these species were very similar (< or =1.17% divergence), we found differences suitable for species identification and intragenomic variation of possible consequence in phyloge ... | 2008 | 17158469 |
| can mosquito magnet® substitute for human-landing catches to sample anopheline populations? | the efficiency of the mosquito magnet liberty plus™ (mmlp) trap was evaluated in comparison to human-landing catches (hlcs) to sample anopheline populations in jabillal, state of bolivar, southern venezuela. the village comprised 37 houses and a population of 101; malaria in this village is primarily due to plasmodium vivax and the annual parasite index is 316.8 per 1,000 population. a longitudinal study was conducted between june 2008-january 2009 for three nights per month every two months bet ... | 2012 | 22666868 |
| laboratory colonization of anopheles (nyssorhynchus) marajoara (diptera: culicidae) by induced copulation. | malaria is a serious public health problem, the control of which involves actions directed against its vector, mosquitoes of the genus anopheles meigan, 1818. the study of insect biology, ecology, and behavior is simplified when these insects are maintained at the laboratory. however, many of the species are eurygamic and require induced mating. females of anopheles marajoara galvão e damasceno, 1942 were collected at mazagão county, state of amapá, brazil. f1 eggs were obtained through forced o ... | 2015 | 26336274 |
| mosqtent: an individual portable protective double-chamber mosquito trap for anthropophilic mosquitoes. | here, we describe the development of the mosqtent, an innovative double-chamber mosquito trap in which a human being attracts mosquitoes while is protected from being bitten within the inner chamber of the trap, while mosquitoes are lured to enter an outer chamber where they are trapped. the mosqtent previously collected an average of 3,000 anophelines/man-hour compared to 240 anophelines/man-hour for the human landing catch (hlc), thereby providing high numbers of human host-seeking mosquitoes ... | 2017 | 28278171 |