Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
|---|
| competitive interactions between larvae of the malaria mosquitoes anopheles arabiensis and anopheles gambiae under semi-field conditions in western kenya. | the present paper reports the occurrence of competition between larvae of the malaria mosquito sibling species anopheles arabiensis and an. gambiae under ambient conditions in western kenya. larvae of both species were reared at the same density and under the same food conditions outdoors in single-species and mixed-species populations (species ratio 1:1) in transparent cups that floated in small and large semi-natural pools, which experienced different diurnal variations in water temperature. i ... | 2009 | 18760989 |
| malaria transmission in dakar: a two-year survey. | according to entomological studies conducted over the past 30 years, there was low malaria transmission in suburb of dakar but little evidence of it in the downtown area. however; there was some evidence of local transmission based on reports of malaria among permanent residents. an entomological evaluation of malaria transmission was conducted from may 2005 to october 2006 in two areas of dakar. | 2008 | 18796138 |
| anopheles gambiae complex along the gambia river, with particular reference to the molecular forms of an. gambiae s.s. | the geographic and temporal distribution of m and s molecular forms of the major afrotropical malaria vector species anopheles gambiae s.s. at the western extreme of their range of distribution has never been investigated in detail. | 2008 | 18803885 |
| reduced susceptibility to ddt in field populations of anopheles quadriannulatus and anopheles arabiensis in malawi: evidence for larval selection. | bioassays for insecticide resistance in adult mosquitoes were conducted on samples of anopheles gambiae giles s.l. (diptera: culicidae) species collected as larvae from breeding sites in the lower shire valley, malawi. the results indicate full susceptibility to permethrin, deltamethrin and malathion, but reduced susceptibility to ddt in one sample from thom (lt(50) of 8.39 min for females and 25.09 min for males). polymerase chain reaction-based species identification of the mosquitoes assayed ... | 2008 | 18816274 |
| dynamics of multiple insecticide resistance in the malaria vector anopheles gambiae in a rice growing area in south-western burkina faso. | insecticide resistance of the main malaria vector, anopheles gambiae, has been reported in south-western burkina faso, west africa. cross-resistance to ddt and pyrethroids was conferred by alterations at site of action in the sodium channel, the leu-phe kdr mutation; resistance to organophosphates and carbamates resulted from a single point mutation in the oxyanion hole of the acetylcholinesterase enzyme designed as ace-1r. | 2008 | 18817564 |
| evidence of increasing leu-phe knockdown resistance mutation in anopheles gambiae from niger following a nationwide long-lasting insecticide-treated nets implementation. | at the end of 2005, a nationwide long-lasting insecticide-treated net (llin) distribution targeting the most vulnerable populations was implemented throughout niger. a large number of studies in africa have reported the existence of anopheline populations resistant to various insecticides, partly due to knockdown resistance (kdr) mutations, but few operational wide-scale control programmes were coupled with the monitoring of such mutations. the distribution of the kdr-west (kdr-w) leu-phe mutati ... | 2008 | 18817574 |
| insecticide resistance in anopheles gambiae from south-western chad, central africa. | indoor residual spraying and insecticide-treated nets (itn) are essential components of malaria vector control in africa. pyrethroids are the only recommended compounds for nets treatment because they are fast-acting insecticides with low mammalian toxicity. however, there is growing concern that pyrethroid resistance may threaten the sustainability of itn scaling-up programmes. here, insecticide susceptibility was investigated in anopheles gambiae sensu lato from an area of large scale itn dist ... | 2008 | 18823537 |
| relation between plasmodium falciparum asymptomatic infection and malaria attacks in a cohort of senegalese children. | it is important to establish whether or not the presence of malaria parasites in peripheral blood of asymptomatic individuals is a predictor of future clinical mild malaria attacks (mma). the aim of this study was to determine how an asymptomatic positive thick blood smear could be related to the occurrence of a mma during the nine following days. | 2008 | 18823542 |
| operational impact of ddt reintroduction for malaria control on anopheles arabiensis in mozambique. | abstract with the increase in indoor residual spraying in many internationally and nationally funded malaria control programs, and affirmation by world health organization (who) that ddt is appropriate for use in the absence of longer lasting insecticide formulations in some malaria endemic settings, ddt has been reintroduced as a major malaria control intervention in africa. indoor residual spraying with ddt was reintroduced into mozambique for malaria control in 2005, and it is increasingly be ... | 2008 | 18826031 |
| spatial distribution of the chromosomal forms of anopheles gambiae in mali. | maps of the distribution of malaria vectors are useful tools for stratification of malaria risk and for selective vector control strategies. although the distribution of members of the anopheles gambiae complex is well documented in africa, a continuous map of the spatial distribution of the chromosomal forms of an. gambiae s.s. is not yet available at country level to support control efforts. | 2008 | 18847463 |
| describing anopheles arabiensis aquatic habitats in two riceland agro-ecosystems in mwea, kenya using a negative binomial regression model with a non-homogenous mean. | this research illustrates a geostatistical approach for modeling the spatial distribution patterns of anopheles arabiensis patton (patton) aquatic habitats in two riceland environments. quickbird 0.61 m data, encompassing the visible bands and the near-infra-red (nir) band, were selected to synthesize images of an. arabiensis aquatic habitats. these bands and field sampled data were used to determine ecological parameters associated with riceland larval habitat development. sas was used to calcu ... | 2009 | 18930703 |
| diversity of riceland mosquitoes and factors affecting their occurrence and distribution in mwea, kenya. | knowledge of mosquito species diversity, occurrence, and distribution is an essential component of vector ecology and a guiding principle to formulation and implementation of integrated vector management programs. a 12-month entomological survey was conducted to determine the diversity of riceland mosquitoes and factors affecting their occurrence and distribution at 3 sites targeted for malaria vector control in mwea, kenya. adult mosquitoes were sampled indoors by pyrethrum spray catch and outd ... | 2008 | 18939686 |
| the role of unused swimming pools as a habitat for anopheles immature stages in urban malindi, kenya. | we conducted larval surveys in habitats located in urban malindi, kenya, in 2005 and 2006 with the goal of determining the productivity of unused swimming pools in relation to other habitats. of the 250 habitats sampled, 66 were unused swimming pools, 93 were wells, 60 were drainage troughs, and 31 were miscellaneous areas, such as septic tanks, swamps, concrete tanks, fish ponds, car-track depressions, and drainage ponds. anopheles gambiae s.1. was the only anophelines species found in the habi ... | 2008 | 18939703 |
| risk factors for house-entry by culicine mosquitoes in a rural town and satellite villages in the gambia. | abstract: | 2008 | 18939969 |
| longitudinal evaluation of ocimum and other plants effects on the feeding behavioral response of mosquitoes (diptera: culicidae) in the field in tanzania. | abstract: | 2008 | 18945343 |
| [malaria in the urban highland area of antananarivo, madagascar: bioecology of anopheles arabiensis]. | an entomological study was performed to document the transmission of plasmodium, agents of human malaria in antananarivo, capital of madagascar. human landing mosquitoes were collected at night during two years, between may 2003 and september 2005, in the two sites of ambohimiandra-manakambahiny and ambolokandrina. the genuses of collected mosquitoes were, in order of abundance, culex, mansonia and anopheles. the only potential vector was anopheles arabiensis. its maximal abundance was observed ... | 2008 | 18956819 |
| the effect of a single blood meal on the phenotypic expression of insecticide resistance in the major malaria vector anopheles funestus. | anopheles funestus is a major malaria vector in southern africa. vector control relies on the use of insecticide chemicals to significantly reduce the number of malaria vectors by targeting that portion of the female population that takes blood meals and subsequently rests indoors. it has been suggested that the intake of a blood meal may assist female mosquitoes to tolerate higher doses of insecticide through vigour tolerance. it is hypothesized that during the process of blood digestion, detox ... | 2008 | 18973704 |
| evaluation of two counterflow traps for testing behaviour-mediating compounds for the malaria vector anopheles gambiae s.s. under semi-field conditions in tanzania. | evaluation of mosquito responses towards different trap-bait combinations in field trials is a time-consuming process that can be shortened by experiments in contained semi-field systems. possible use of the bg sentinel (bgs) trap to sample anopheles gambiae s.s. was evaluated. the efficiency of this trap was compared with that of the mosquito magnet-x (mm-x) trap, when baited with foot odour alone or combinations of foot odour with carbon dioxide (co2) or lemongrass as behaviour-modifying cues. | 2008 | 18980669 |
| variations in entomological indices in relation to weather patterns and malaria incidence in east african highlands: implications for epidemic prevention and control. | malaria epidemics remain a significant public health issue in the east african highlands. the aim of this study was to monitor temporal variations in vector densities in relation to changes in meteorological factors and malaria incidence at four highland sites in kenya and uganda and to evaluate the implications of these relationships for epidemic prediction and control. | 2008 | 18983649 |
| sperm quantity and size variation in un-irradiated and irradiated males of the malaria mosquito anopheles arabiensis patton. | anopheles mosquitoes are important candidates for genetic control strategies. however, little is known about sperm quality and quantity as determinants of male reproductive success. in this study, sperm quantity and length variation were assessed in testes of un-irradiated and irradiated anopheles arabiensis. male reproductive organs were dissected for sperm and an estimate of the total number of spermatozoa was made. sperm lengths were measured using imaging software. the effects of irradiation ... | 2009 | 18992210 |
| expression of the cytochrome p450s, cyp6p3 and cyp6m2 are significantly elevated in multiple pyrethroid resistant populations of anopheles gambiae s.s. from southern benin and nigeria. | insecticide resistance in anopheles mosquitoes is threatening the success of malaria control programmes. this is particularly true in benin where pyrethroid resistance has been linked to the failure of insecticide treated bed nets. the role of mutations in the insecticide target sites in conferring resistance has been clearly established. in this study, the contribution of other potential resistance mechanisms was investigated in anopheles gambiae s.s. from a number of localities in southern ben ... | 2008 | 19014539 |
| pyrethroid resistance in the major malaria vector anopheles arabiensis from gwave, a malaria-endemic area in zimbabwe. | insecticide resistance can present a major obstacle to malaria control programmes. following the recent detection of ddt resistance in anopheles arabiensis in gokwe, zimbabwe, the underlying resistance mechanisms in this population were studied. | 2008 | 19038063 |
| methylparaben in anopheles gambiae s.l. sugar meals increases longevity and malaria oocyst abundance but is not a preferred diet. | the antimicrobial and antifungal chemical methylparaben (methyl-4-hydroxybenzoate) was added to the adult sucrose diet of anopheles gambiae and anopheles arabiensis, and its effect on longevity was determined. in all cases, significant increases in longevity were observed when 0.2% (w/v) methylparaben was added to meals that were refreshed weekly. when fresh sugar diet was refreshed daily, no increase in longevity was observed due to methylparaben suggesting that the effect of methylparaben is t ... | 2009 | 19041323 |
| increased endophily by the malaria vector anopheles arabiensis in southern zambia and identification of digested blood meals. | an increase in anopheles arabiensis showing endophilic behavior was observed in macha, zambia during march 2007. to determine whether this shift in resting behavior was accompanied by a change in feeding preference, an attempt was made to calculate the human blood index. however, only 46.2% of blood meals were successfully identified with existing polymerase chain reaction (pcr) diagnostics. this failure was hypothesized to be caused by the limitations of existing methods that are not capable of ... | 2008 | 19052296 |
| evaluation and optimization of membrane feeding compared to direct feeding as an assay for infectivity. | malaria parasite infectivity to mosquitoes has been measured in a variety of ways and setting, includind direct feeds of and/or membrane feeding blood collected from randomly selected or gametocytemic volunteers. anopheles gambiae s.l is the main vector responsible of plasmodium falciparum transmission in bancoumana and represents about 90% of the laboratory findings, whereas plasmodium malariae and plasmodium ovale together represent only 10%. | 2008 | 19055715 |
| plasmodium falciparum gametocyte dynamics in areas of different malaria endemicity. | the aim of this study was to identify and compare factors associated with plasmodium falciparum gametocyte carriage in three regions of differing malaria endemicity. | 2008 | 19055751 |
| the influence of late-stage pupal irradiation and increased irradiated: un-irradiated male ratio on mating competitiveness of the malaria mosquito anopheles arabiensis patton. | competitiveness of released males in genetic control programmes is of critical importance. in this paper, we explored two scenarios to compensate for the loss of mating competitiveness after pupal stage irradiation in males of the malaria mosquito anopheles arabiensis. first, competition experiments with a higher ratio of irradiated versus un-irradiated males were performed. second, pupae were irradiated just prior to emergence and male mating competitiveness was determined. males were irradiate ... | 2009 | 19063756 |
| species interactions among larval mosquitoes: context dependence across habitat gradients. | biotic interactions involving mosquito larvae are context dependent, with effects of interactions on populations altered by ecological conditions. relative impacts of competition and predation change across a gradient of habitat size and permanence. asymmetrical competition is common and ecological context changes competitive advantage, potentially facilitating landscape-level coexistence of competitors. predator effects on mosquito populations sometimes depend on habitat structure and on emerge ... | 0 | 19067629 |
| global warming and malaria: knowing the horse before hitching the cart. | speculations on the potential impact of climate change on human health frequently focus on malaria. predictions are common that in the coming decades, tens - even hundreds - of millions more cases will occur in regions where the disease is already present, and that transmission will extend to higher latitudes and altitudes. such predictions, sometimes supported by simple models, are persuasive because they are intuitive, but they sidestep factors that are key to the transmission and epidemiology ... | 2008 | 19091037 |
| the role of anti-malarial drugs in eliminating malaria. | effective anti-malarial drug treatment reduces malaria transmission. this alone can reduce the incidence and prevalence of malaria, although the effects are greater in areas of low transmission where a greater proportion of the infectious reservoir is symptomatic and receives anti-malarial treatment. effective treatment has greater effects on the transmission of falciparum malaria, where gametocytogenesis is delayed, compared with the other human malarias in which peak gametocytaemia and transmi ... | 2008 | 19091042 |
| clarification of anomalies in the application of a 2la molecular karyotyping method for the malaria vector anopheles gambiae. | abstract: | 2008 | 19091112 |
| use of integrated malaria management reduces malaria in kenya. | during an entomological survey in preparation for malaria control interventions in mwea division, the number of malaria cases at the kimbimbi sub-district hospital was in a steady decline. the underlying factors for this reduction were unknown and needed to be identified before any malaria intervention tools were deployed in the area. we therefore set out to investigate the potential factors that could have contributed to the decline of malaria cases in the hospital by analyzing the malaria cont ... | 2008 | 19115000 |
| the multiplicity of malaria transmission: a review of entomological inoculation rate measurements and methods across sub-saharan africa. | plasmodium falciparum malaria is a serious tropical disease that causes more than one million deaths each year, most of them in africa. it is transmitted by a range of anopheles mosquitoes and the risk of disease varies greatly across the continent. the "entomological inoculation rate" is the commonly-used measure of the intensity of malaria transmission, yet the methods used are currently not standardized, nor do they take the ecological, demographic, and socioeconomic differences across popula ... | 2009 | 19166589 |
| molecular and behavioral differentiation among brazilian populations of lutzomyia longipalpis (diptera: psychodidae: phlebotominae). | lutzomyia longipalpis is the primary vector of american visceral leishmaniasis. there is strong evidence that l. longipalpis is a species complex, but until recently the existence of sibling species among brazilian populations was considered a controversial issue. in addition, there is still no consensus regarding the number of species occurring in this complex. | 2009 | 19172187 |
| the indian ocean dipole and malaria risk in the highlands of western kenya. | epidemics of malaria in the east african highlands in the last 2 decades have often been associated with climate variability, particularly the el niño-southern oscillation (enso). however, there are other factors associated with malaria risk and there is increased interest in the influences of the indian ocean dipole (iod), a climate mode of coupled ocean-atmosphere variability, on east african rainfall. this study explores the relationship between iod and the number of malaria patients in 7 hos ... | 2009 | 19174522 |
| two duplicated p450 genes are associated with pyrethroid resistance in anopheles funestus, a major malaria vector. | pyrethroid resistance in anopheles funestus is a potential obstacle to malaria control in africa. tools are needed to detect resistance in field populations. we have been using a positional cloning approach to identify the major genes conferring pyrethroid resistance in this vector. a quantitative trait locus (qtl) named rp1 explains 87% of the genetic variance in pyrethroid susceptibility in two families from reciprocal crosses between susceptible and resistant strains. two additional qtls of m ... | 2009 | 19196725 |
| agent-based modelling of mosquito foraging behaviour for malaria control. | traditional environmental management programmes require extensive coverage of larval habitats to reduce drastically the emergence of adult mosquitoes. recent studies have highlighted the impact of reduced availability of aquatic habitats on mosquito foraging for hosts and oviposition sites. in this study, we developed an agent-based model to track the status and movement of mosquitoes individually. mosquito foraging was represented as a two-stage process: random flight when the resource was not ... | 2009 | 19200566 |
| household possession, use and non-use of treated or untreated mosquito nets in two ecologically diverse regions of nigeria--niger delta and sahel savannah. | current use of treated mosquito nets for the prevention of malaria falls short of what is expected in sub-saharan africa (ssa), though research within the continent has indicated that the use of these commodities can reduce malaria morbidity by 50% and malaria mortality by 20%. governments in sub-sahara africa are investing substantially in scaling-up treated mosquito net coverage for impact. however, certain significant factors still prevent the use of the treated mosquito nets, even among thos ... | 2009 | 19228422 |
| molecular evolution of immune genes in the malaria mosquito anopheles gambiae. | background: as pathogens that circumvent the host immune response are favoured by selection, so are host alleles that reduce parasite load. such evolutionary processes leave their signature on the genes involved. deciphering modes of selection operating on immune genes might reveal the nature of host-pathogen interactions and factors that govern susceptibility in host populations. such understanding would have important public health implications. methodology/findings: we analyzed polymorphisms ... | 2009 | 19234606 |
| effects of intraspecific larval competition on adult longevity in the mosquitoes aedes aegypti and aedes albopictus. | larval competition is common in container-breeding mosquitoes. the impact of competition on larval growth has been thoroughly examined and findings that larval competition can lead to density-dependent effects on adult body size have been documented. the effects of larval competition on adult longevity have been less well explored. the effects of intraspecific larval densities on the longevity of adults maintained under relatively harsh environmental conditions were tested in the laboratory by m ... | 0 | 19239615 |
| mitochondrial pseudogenes in the nuclear genome of aedes aegypti mosquitoes: implications for past and future population genetic studies. | mitochondrial dna (mtdna) is widely used in population genetic and phylogenetic studies in animals. however, such studies can generate misleading results if the species concerned contain nuclear copies of mtdna (numts) as these may amplify in addition to, or even instead of, the authentic target mtdna. the aim of this study was to determine if numts are present in aedes aegypti mosquitoes, to characterise any numts detected, and to assess the utility of using mtdna for population genetics studie ... | 2009 | 19267896 |
| feasibility and acceptability of home-based management of malaria strategy adapted to sudan's conditions using artemisinin-based combination therapy and rapid diagnostic test. | malaria remains a major public health problem especially in sub-saharan africa. despite the efforts exerted to provide effective anti-malarial drugs, still some communities suffer from getting access to these services due to many barriers. this research aimed to assess the feasibility and acceptability of home-based management of malaria (hmm) strategy using artemisinin-based combination therapy (act) for treatment and rapid diagnostic test (rdt) for diagnosis. | 2009 | 19272157 |
| fcgammariia (cd32) polymorphism and anti-malarial igg subclass pattern among fulani and sympatric ethnic groups living in eastern sudan. | a snp at position 131, in the fcgammariia gene, affects the binding of the different igg subclasses and may influence the clinical variation seen in patients with falciparum malaria. this study confirms and extends previous findings, analysing the fcgammariia (cd32) polymorphism in relation to the igg subclass distribution seen among two sympatric tribes living in eastern sudan, characterized by marked differences in susceptibility to plasmodium falciparum malaria. | 2009 | 19284648 |
| parasitism of kenyan mosquito larvae (diptera: culicidae) by romanomermis culicivorax (nematoda: mermithidae). | the ability of romanomermis culicivorax to infect, develop, and emerge from kenyan mosquito hosts was evaluated in the laboratory. host species tested were aedes aegypti, ae. dentatus, ae. hirsutus, anopheles arabiensis, an. coustani, an. funestus, an. gambiae, an. pharoensis, culex duttoni, cu. ethiopicus, cu. poicilipes, cu. quinquefasciatus, cu. tigripes, cu. univittatus, coquillettidia metallica, mansonia africana, ma. uniformis, mimomyia splendens, mi. uniformis, toxorhyncites brevipalpis, ... | 1988 | 19290190 |
| microbial larvicide application by a large-scale, community-based program reduces malaria infection prevalence in urban dar es salaam, tanzania. | malaria control in africa is most tractable in urban settlements yet most research has focused on rural settings. elimination of malaria transmission from urban areas may require larval control strategies that complement adult mosquito control using insecticide-treated nets or houses, particularly where vectors feed outdoors. | 2009 | 19333402 |
| structure and dynamics of male swarms of anopheles gambiae. | mosquito swarms are poorly understood mating aggregations. in the malaria vector anopheles gambiae giles, they are known to depend on environmental conditions, such as the presence of a marker on the ground, and they may be highly relevant to reproductive isolation. we present quantitative measurements of individual an. gambiae positions within swarms from donéguébougou, mali, estimated by stereoscopic video image analysis. results indicate that swarms in this species are approximately spherical ... | 2009 | 19351073 |
| identifying the most productive breeding sites for malaria mosquitoes in the gambia. | ideally larval control activities should be targeted at sites that generate the most adult vectors, thereby reducing operational costs. despite the plethora of potential mosquito breeding sites found in the floodplains of the gambia river, about 150 km from its mouth, during the rainy season, only a small proportion are colonized by anophelines on any day. this study aimed to determine the characteristics of larval habitats most frequently and most densely populated by anopheline larvae and to e ... | 2009 | 19361337 |
| a supervised land cover classification of a western kenya lowland endemic for human malaria: associations of land cover with larval anopheles habitats. | a supervised land cover classification was developed from very high resolution ikonos satellite data and extensive ground truth sampling of a ca. 10 sq km malaria-endemic lowland in western kenya. the classification was then applied to an investigation of distribution of larval anopheles habitats. the hypothesis was that the distribution and abundance of aquatic habitats of larvae of various species of mosquitoes in the genus anopheles is associated with identifiable landscape features. | 2009 | 19371425 |
| using the satscan method to detect local malaria clusters for guiding malaria control programmes. | mpumalanga province, south africa is a low malaria transmission area that is subject to malaria epidemics. satscan methodology was used by the malaria control programme to detect local malaria clusters to assist disease control planning. the third season for case cluster identification overlapped with the first season of implementing an outbreak identification and response system in the area. | 2009 | 19374738 |
| thermal behaviour of anopheles stephensi in response to infection with malaria and fungal entomopathogens. | temperature is a critical determinant of the development of malaria parasites in mosquitoes, and hence the geographic distribution of malaria risk, but little is known about the thermal preferences of anopheles. a number of other insects modify their thermal behaviour in response to infection. these alterations can be beneficial for the insect or for the infectious agent. given current interest in developing fungal biopesticides for control of mosquitoes, anopheles stephensi were examined to tes ... | 2009 | 19379519 |
| insecticide resistance profiles for malaria vectors in the kassena-nankana district of ghana. | malaria is a major public health problem in ghana. the current strategy of the national malaria control programme is based on effective case management and the use of insecticide treated bed nets among vulnerable groups such as children under-five years of age and pregnant women. resistance to pyrethroids by anopheles gambiae s.l. and anopheles funestus has been reported in several african countries including neighbouring burkina faso. | 2009 | 19389257 |
| a resting box for outdoor sampling of adult anopheles arabiensis in rice irrigation schemes of lower moshi, northern tanzania. | malaria vector sampling is the best method for understanding the vector dynamics and infectivity; thus, disease transmission seasonality can be established. there is a need to protecting humans involved in the sampling of disease vectors during surveillance or in control programmes. in this study, human landing catch, two cow odour baited resting boxes and an unbaited resting box were evaluated as vector sampling tools in an area with a high proportion of anopheles arabiensis, as the major malar ... | 2009 | 19393098 |
| absence of knockdown resistance suggests metabolic resistance in the main malaria vectors of the mekong region. | as insecticide resistance may jeopardize the successful malaria control programmes in the mekong region, a large investigation was previously conducted in the mekong countries to assess the susceptibility of the main malaria vectors against ddt and pyrethroid insecticides. it showed that the main vector, anopheles epiroticus, was highly pyrethroid-resistant in the mekong delta, whereas anopheles minimus sensu lato was pyrethroid-resistant in northern vietnam. anopheles dirus sensu stricto showed ... | 2009 | 19400943 |
| preliminary study of malaria incidence in nouakchott, mauritania. | malaria is one of the main motives for outpatient consultation and hospitalization in mauritania. however, its incidence remains unclear because of diagnostic problems and insufficient epidemiological data. | 2009 | 19416545 |
| shifting suitability for malaria vectors across africa with warming climates. | climates are changing rapidly, producing warm climate conditions globally not previously observed in modern history. malaria is of great concern as a cause of human mortality and morbidity, particularly across africa, thanks in large part to the presence there of a particularly competent suite of mosquito vector species. | 2009 | 19426558 |
| development of vegetable farming: a cause of the emergence of insecticide resistance in populations of anopheles gambiae in urban areas of benin. | a fast development of urban agriculture has recently taken place in many areas in the republic of benin. this study aims to assess the rapid expansion of urban agriculture especially, its contribution to the emergence of insecticide resistance in populations of anopheles gambiae. | 2009 | 19442297 |
| the anopheles gambiae salivary protein gsg6: an anopheline-specific protein with a blood-feeding role. | the anopheles gambiae salivary gland protein 6 (gsg6) is a small protein specifically found in the salivary glands of adult female mosquitoes. we report here the expression of a recombinant form of the protein and we show that in vivo gsg6 is expressed in distal-lateral lobes and is secreted with the saliva while the female mosquito probes for feeding. injection of gsg6 dsrna into adult a. gambiae females results in decreased gsg6 protein levels, increased probing time and reduced blood feeding ... | 2009 | 19442731 |
| house design modifications reduce indoor resting malaria vector densities in rice irrigation scheme area in western kenya. | simple modifications of typical rural house design can be an effective and relatively inexpensive method of reducing indoor mosquito vector densities and consequently decreasing malaria transmission. public health scientists have shown the potential for house design to protect people against malaria, yet this type of intervention remains virtually ignored. a randomized-controlled study was, therefore, undertaken to determine the effects of this method of vector control on the density of indoor r ... | 2009 | 19454025 |
| living at the edge: biogeographic patterns of habitat segregation conform to speciation by niche expansion in anopheles gambiae. | ongoing lineage splitting within the african malaria mosquito anopheles gambiae is compatible with ecological speciation, the evolution of reproductive isolation by divergent natural selection acting on two populations exploiting alternative resources. divergence between two molecular forms (m and s) identified by fixed differences in rdna, and characterized by marked, although incomplete, reproductive isolation is occurring in west and central africa. to elucidate the role that ecology and geog ... | 2009 | 19460144 |
| ecological niche partitioning between anopheles gambiae molecular forms in cameroon: the ecological side of speciation. | speciation among members of the anopheles gambiae complex is thought to be promoted by disruptive selection and ecological divergence acting on sets of adaptation genes protected from recombination by polymorphic paracentric chromosomal inversions. however, shared chromosomal polymorphisms between the m and s molecular forms of an. gambiae and insufficient information about their relationship with ecological divergence challenge this view. we used geographic information systems, ecological niche ... | 2009 | 19460146 |
| malaria vectors and transmission dynamics in goulmoun, a rural city in south-western chad. | knowledge of some baseline entomological data such as entomological inoculation rates (eir) is crucially needed to assess the epidemiological impact of malaria control activities directed either against parasites or vectors. in chad, most published surveys date back to the 1960's. in this study, anopheline species composition and their relation to malaria transmission were investigated in a dry sudanian savannas area of chad. | 2009 | 19463189 |
| utilization, retention and bio-efficacy studies of permanet in selected villages in buie and fentalie districts of ethiopia. | malaria remains a major public health problem in ethiopia. pyrethroid-treated mosquito nets are one of the major tools available for the prevention and control of malaria transmission. permanet is a long-lasting insecticide-treated net (llin) recommended by who for malaria control. | 2009 | 19480712 |
| efficiency evaluation of nozawa-style black light trap for control of anopheline mosquitoes. | house-residual spraying and insecticide-treated bed nets have achieved some success in controlling anthropophilic and endophagic vectors. however, these methods have relatively low efficacy in korea because anopheles sinensis, the primary malaria vector, is highly zoophilic and exophilic. so, we focused our vector control efforts within livestock enclosures using ultraviolet black light traps as a mechanical control measure. we found that black light traps captured significantly more mosquitoes ... | 2009 | 19488423 |
| inferring selection in the anopheles gambiae species complex: an example from immune-related serine protease inhibitors. | mosquitoes of the anopheles gambiae species complex are the primary vectors of human malaria in sub-saharan africa. many host genes have been shown to affect plasmodium development in the mosquito, and so are expected to engage in an evolutionary arms race with the pathogen. however, there is little conclusive evidence that any of these mosquito genes evolve rapidly, or show other signatures of adaptive evolution. | 2009 | 19497100 |
| spatial and temporal distribution of the malaria mosquito anopheles arabiensis in northern sudan: influence of environmental factors and implications for vector control. | malaria is an important public health problem in northern sudan, but little is known about the dynamics of its transmission. given the characteristic low densities of anopheles arabiensis and the difficult terrain in this area, future vector control strategies are likely to be based on area-wide integrated pest management (aw-ipm) that may include the sterile insect technique (sit). to support the planning and implementation of future aw-ipm activities, larval surveys were carried out to provide ... | 2009 | 19500425 |
| the suitability of clay pots for indoor sampling of mosquitoes in an arid area in northern tanzania. | water storage clay pots have been recently explored as method for outdoor mosquito sampling and as novel device for administrating insect-pathogenic fungi to mosquitoes. their suitability for indoor mosquito sampling in natural conditions is unknown. we tested clay pots as indoor resting sites alongside catches by cdc light trap in an area of low malaria endemicity in northern tanzania. mosquitoes were caught by clay pots although the rate of female anopheles mosquito catches was 22.64 (95% ci 1 ... | 2009 | 19524083 |
| field investigation on the repellent activity of some aromatic plants by traditional means against anopheles arabiensis and an. pharoensis (diptera: culicidae) around koka, central ethiopia. | a study was undertaken to evaluate the impact of traditional application methods of mosquito repellent plants in the reduction of the human-vector contact of malaria vectors in central ethiopia. the plants (corymbia citriodora, eucalyptus camaldulensis, ocimum suave and ocimum basilicum) were tested by thermal expulsion and direct burning on traditional stoves in the field against two important malaria vectors in ethiopia (anopheles arabiensis and an. pharoensis). a latin-square design was appli ... | 2009 | 19539591 |
| highly focused anopheline breeding sites and malaria transmission in dakar. | urbanization has a great impact on the composition of the vector system and malaria transmission dynamics. in dakar, some malaria cases are autochthonous but parasite rates and incidences of clinical malaria attacks have been recorded at low levels. ecological heterogeneity of malaria transmission was investigated in dakar, in order to characterize the anopheles breeding sites in the city and to study the dynamics of larval density and adult aggressiveness in ten characteristically different urb ... | 2009 | 19552809 |
| comparative evaluation of four mosquitoes sampling methods in rice irrigation schemes of lower moshi, northern tanzania. | adult malaria vector sampling is the most important parameter for setting up an intervention and understanding disease dynamics in malaria endemic areas. the intervention will ideally be species-specific according to sampling output. it was the objective of this study to evaluate four sampling techniques, namely human landing catch, pit shelter, indoor resting collection and odour-baited entry trap. | 2009 | 19580663 |
| pcr-based methods for the detection of l1014 kdr mutation in anopheles culicifacies sensu lato. | anopheles culicifacies s.l., a major malaria vector in india, has developed widespread resistance to ddt and is becoming resistant to pyrethroids-the only insecticide class recommended for the impregnation of bed nets. knock-down resistance due to a point mutation in the voltage gated sodium channel at l1014 residue (kdr) is a common mechanism of resistance to ddt and pyrethroids. the selection of this resistance may pose a serious threat to the success of the pyrethroid-impregnated bed net prog ... | 2009 | 19594947 |
| a new tent trap for sampling exophagic and endophagic members of the anopheles gambiae complex. | mosquito sampling methods are essential for monitoring and evaluating malaria vector control interventions. in urban dar es salaam, human landing catch (hlc) is the only method sufficiently sensitive for monitoring malaria-transmitting anopheles. hlc is labour intensive, cumbersome, hazardous, and requires such intense supervision that is difficulty to sustain on large scales. | 2009 | 19602253 |
| fever treatment in the absence of malaria transmission in an urban informal settlement in nairobi, kenya. | in sub-saharan africa, knowledge of malaria transmission across rapidly proliferating urban centres and recommendations for its prevention or management remain poorly defined. this paper presents the results of an investigation into infection prevalence and treatment of recent febrile events among a slum population in nairobi, kenya. | 2009 | 19604369 |
| assessment of the relative success of sporozoite inoculations in individuals exposed to moderate seasonal transmission. | the time necessary for malaria parasite to re-appear in the blood following treatment (re-infection time) is an indirect method for evaluating the immune defences operating against pre-erythrocytic and early erythrocytic malaria stages. few longitudinal data are available in populations in whom malaria transmission level had also been measured. | 2009 | 19604389 |
| high, clustered, nucleotide diversity in the genome of anopheles gambiae revealed through pooled-template sequencing: implications for high-throughput genotyping protocols. | association mapping approaches are dependent upon discovery and validation of single nucleotide polymorphisms (snps). to further association studies in anopheles gambiae we conducted a major resequencing programme, primarily targeting regions within or close to candidate genes for insecticide resistance. | 2009 | 19607710 |
| malaria-related perceptions and practices of women with children under the age of five years in rural ethiopia. | malaria remains to be the major cause of morbidity and mortality among pregnant women and children in ethiopia. the aim of this study was to investigate the local perceptions, practices and treatment seeking behaviour for malaria among women with children under the age of five years. | 2009 | 19627572 |
| agriculture and the promotion of insect pests: rice cultivation in river floodplains and malaria vectors in the gambia. | anthropogenic modification of natural habitats can create conditions in which pest species associated with humans can thrive. in order to mitigate for these changes, it is necessary to determine which aspects of human management are associated with the promotion of those pests. anopheles gambiae, the main africa malaria vector, often breeds in rice fields. here the impact of the ancient practice of 'swamp rice' cultivation, on the floodplains of the gambia river, on the production of anopheline ... | 2009 | 19635125 |
| decreased motivation in the use of insecticide-treated nets in a malaria endemic area in burkina faso. | the use of insecticide-treated nets (itn) is an important tool in the roll back malaria (rbm) strategy. for itns to be effective they need to be used correctly. previous studies have shown that many factors, such as wealth, access to health care, education, ethnicity and gender, determine the ownership and use of itns. some studies showed that free distribution and public awareness campaigns increased the rate of use. however, there have been no evaluations of the short- and long-term impact of ... | 2009 | 19640290 |
| chloroquine-resistant plasmodium vivax malaria in serbo town, jimma zone, south-west ethiopia. | ethiopia has the highest proportion of vivax malaria, approximately 40% of all malaria infections, in contrast to african countries. chloroquine (cq) is the drug of choice for the treatment of plasmodium vivax infection in the country, although cq resistant p. vivax (crpv) has started to challenge the efficacy of the drug. the present study was conducted to assess the current status of crpv at serbo, jimma zone, south-west ethiopia. | 2009 | 19642976 |
| status of insecticide susceptibility in anopheles gambiae s.l. from malaria surveillance sites in the gambia. | vector control is an effective way of reducing malaria transmission. the main vector control methods include the use of insecticide-treated bed nets and indoor residual spraying (irs). both interventions rely on the continuing susceptibility of anopheles to a limited number of insecticides. however, insecticide resistance, in particular pyrethroid-ddt cross-resistance, is a challenge facing malaria vector control in africa because pyrethroids represent the only class of insecticides approved for ... | 2009 | 19656399 |
| longitudinal survey of malaria morbidity over 10 years in saharevo (madagascar): further lessons for strengthening malaria control. | madagascar has been known for having bio-geo-ecological diversity which is reflected by a complex malaria epidemiology ranging from hyperendemic to malaria-free areas. malaria-related attacks and infection are frequently recorded both in children and adults living in areas of low malaria transmission. to integrate this variability in the national malaria control policy, extensive epidemiological studies are required to up-date previous records and adjust strategies. | 2009 | 19660116 |
| comparative evaluation of the ifakara tent trap-b, the standardized resting boxes and the human landing catch for sampling malaria vectors and other mosquitoes in urban dar es salaam, tanzania. | frequent, sensitive and accurate sampling of anopheles mosquitoes is a prerequisite for effective management of malaria vector control programmes. the most reliable existing means to measure mosquito density is the human landing catch (hlc). however, the hlc technique raises major ethical concerns because of the necessity to expose humans to vectors of malaria and a variety of other pathogens. furthermore, it is a very arduous undertaking that requires intense supervision, which is severely limi ... | 2009 | 19674477 |
| human igg response to a salivary peptide, gsg6-p1, as a new immuno-epidemiological tool for evaluating low-level exposure to anopheles bites. | human populations exposed to low malaria transmission present particular severe risks of malaria morbidity and mortality. in addition, in a context of low-level exposure to anopheles vector, conventional entomological methods used for sampling anopheles populations are insufficiently sensitive and probably under-estimate the real risk of malaria transmission. the evaluation of antibody (ab) responses to arthropod salivary proteins constitutes a novel tool for estimating exposure level to insect ... | 2009 | 19674487 |
| integration of irradiation with cytoplasmic incompatibility to facilitate a lymphatic filariasis vector elimination approach. | abstract: | 2009 | 19682363 |
| sterile-insect methods for control of mosquito-borne diseases: an analysis. | effective vector control, and more specifically mosquito control, is a complex and difficult problem, as illustrated by the continuing prevalence (and spread) of mosquito-transmitted diseases. the sterile insect technique and similar methods control certain agricultural insect pest populations in a species-specific, environmentally sound, and effective manner; there is increased interest in applying this approach to vector control. such an approach, like all others in use and development, is not ... | 0 | 19725763 |
| spatial swarm segregation and reproductive isolation between the molecular forms of anopheles gambiae. | anopheles gambiae, the major malaria vector in africa, can be divided into two subgroups based on genetic and ecological criteria. these two subgroups, termed the m and s molecular forms, are believed to be incipient species. although they display differences in the ecological niches they occupy in the field, they are often sympatric and readily hybridize in the laboratory to produce viable and fertile offspring. evidence for assortative mating in the field was recently reported, but the underly ... | 2009 | 19734189 |
| inversion 2la is associated with enhanced desiccation resistance in anopheles gambiae. | anopheles gambiae, the principal vector of malignant malaria in africa, occupies a wide range of habitats. environmental flexibility may be conferred by a number of chromosomal inversions non-randomly associated with aridity, including 2la. the purpose of this study was to determine the physiological mechanisms associated with the 2la inversion that may result in the preferential survival of its carriers in hygrically-stressful environments. | 2009 | 19772577 |
| a heteroskedastic error covariance matrix estimator using a first-order conditional autoregressive markov simulation for deriving asympotical efficient estimates from ecological sampled anopheles arabiensis aquatic habitat covariates. | autoregressive regression coefficients for anopheles arabiensis aquatic habitat models are usually assessed using global error techniques and are reported as error covariance matrices. a global statistic, however, will summarize error estimates from multiple habitat locations. this makes it difficult to identify where there are clusters of an. arabiensis aquatic habitats of acceptable prediction. it is therefore useful to conduct some form of spatial error analysis to detect clusters of an. arab ... | 2009 | 19772590 |
| heat shock proteins contribute to mosquito dehydration tolerance. | this study examines the responses of heat shock protein transcripts, hsp70 and hsp90, to dehydration stress in three mosquito species, aedes aegypti, anopheles gambiae and culex pipiens. we first defined the water balance attributes of adult females of each species, monitored expression of the hsp transcripts in response to dehydration, and then knocked down expression of the transcripts using rna interference (rnai) to evaluate potential functions of the hsps in maintenance of water balance. fu ... | 2010 | 19782687 |
| a mechanistic approach for accurate simulation of village scale malaria transmission. | malaria transmission models commonly incorporate spatial environmental and climate variability for making regional predictions of disease risk. however, a mismatch of these models' typical spatial resolutions and the characteristic scale of malaria vector population dynamics may confound disease risk predictions in areas of high spatial hydrological variability such as the sahel region of africa. | 2009 | 19799793 |
| fungal infection counters insecticide resistance in african malaria mosquitoes. | the evolution of insecticide resistance in mosquitoes is threatening the effectiveness and sustainability of malaria control programs in various parts of the world. through their unique mode of action, entomopathogenic fungi provide promising alternatives to chemical control. however, potential interactions between fungal infection and insecticide resistance, such as cross-resistance, have not been investigated. we show that insecticide-resistant anopheles mosquitoes remain susceptible to infect ... | 2009 | 19805146 |
| placental malaria and low birth weight in pregnant women living in a rural area of burkina faso following the use of three preventive treatment regimens. | the weekly chemoprophylaxis of malaria during pregnancy with chloroquine (cq) has become problematic with the increasing resistance of plasmodium falciparum to this drug. there was a need to test the benefits of new strategies over the classical chemoprophylaxis. this study was conducted to provide data to the national malarial control programme for an evidence-based policy change decision making process. it compares the efficacy of two ipt regimens, using chloroquine (cq) or sulphadoxine/pyrime ... | 2009 | 19811649 |
| managing insecticide resistance in malaria vectors by combining carbamate-treated plastic wall sheeting and pyrethroid-treated bed nets. | pyrethroid resistance is now widespread in anopheles gambiae, the major vector for malaria in sub-saharan africa. this resistance may compromise malaria vector control strategies that are currently in use in endemic areas. in this context, a new tool for management of resistant mosquitoes based on the combination of a pyrethroid-treated bed net and carbamate-treated plastic sheeting was developed. | 2009 | 19843332 |
| habitat stability and occurrences of malaria vector larvae in western kenya highlands. | although the occurrence of malaria vector larvae in the valleys of western kenya highlands is well documented, knowledge of larval habitats in the uphill sites is lacking. given that most inhabitants of the highlands actually dwell in the uphill regions, it is important to develop understanding of mosquito breeding habitat stability in these sites in order to determine their potential for larval control. | 2009 | 19845968 |
| authentication scheme for routine verification of genetically similar laboratory colonies: a trial with anopheles gambiae. | when rearing morphologically indistinguishable laboratory strains concurrently, the threat of unintentional genetic contamination is constant. avoidance of accidental mixing of strains is difficult due to the use of common equipment, technician error, or the possibility of self relocation by adult mosquitoes ("free fliers"). in many cases, laboratory strains are difficult to distinguish because of morphological and genetic similarity, especially when laboratory colonies are isolates of certain t ... | 2009 | 19849838 |
| exploring the molecular basis of insecticide resistance in the dengue vector aedes aegypti: a case study in martinique island (french west indies). | the yellow fever mosquito aedes aegypti is a major vector of dengue and hemorrhagic fevers, causing up to 100 million dengue infections every year. as there is still no medicine and efficient vaccine available, vector control largely based on insecticide treatments remains the only method to reduce dengue virus transmission. unfortunately, vector control programs are facing operational challenges with mosquitoes becoming resistant to commonly used insecticides. resistance of ae. aegypti to chemi ... | 2009 | 19857255 |
| seasonal distribution of anopheles funestus chromosomal forms from burkina faso. | previous studies of anopheles funestus chromosomal inversion polymorphisms in burkina faso showed large departures from hardy-weinberg equilibrium and linkage disequilibrium among inversions located on different chromosomes, implying the existence of two taxonomic units ("chromosomal forms") with limited genetic flow. one chromosomal form, named folonzo, is highly polymorphic for alternative rearrangements of 3ra, 3rb, 2ra, and 3la; the other, kiribina, is predominantly characterized by the stan ... | 2009 | 19857258 |
| larvicidal, adult emergence inhibition and oviposition deterrent effects of foliage extract from ricinus communis l. against anopheles arabiensis and culex quinquefasciatus in sudan. | malaria and filariases are prevalent in sudan and their control depends largely on preventive measures against mosquito vectors. the present work aimed to investigate the larvicidal, adults emergence inhibition and oviposition deterrent effects of aqueous extracts from leaves of ricinus communis l. against the mosquitoes, anopheles arabiensis and culex quinquefasciatus as a biological control means. the larval mortality was observed after 24 hours. the lc50 values calculated were 403.65, 445.66 ... | 2009 | 19901899 |
| identification and characterization of odorant-binding protein 1 gene from the asian malaria mosquito, anopheles stephensi. | insect odorant-binding proteins (obps) are small, water-soluble molecules that are thought to transport the hydrophobic odorants to their receptors in the chemosensory neurones. here we report the identification and molecular characterization of the anopheles stephensi odorant-binding protein 1 gene (asteobp1), an obp1 gene in an. stephensi, a major malaria vector in asia. we show that asteobp1 and anopheles gambiae obp1 (agamobp1) are orthologues. these two genes share similar coding sequences ... | 2010 | 19909381 |
| the impact of a small-scale irrigation scheme on malaria transmission in ziway area, central ethiopia. | to assess the impact of a small-scale irrigation scheme in ziway area, a semi-arid area in the central ethiopian rift valley, on malaria transmission. | 2010 | 19917039 |
| introduction: development of the sterile insect technique for african malaria vectors. | 2009 | 19917069 |