| the anopheles dirus complex: spatial distribution and environmental drivers. | the anopheles dirus complex includes efficient malaria vectors of the asian forested zone. studies suggest ecological and biological differences between the species of the complex but variations within species suggest possible environmental influences. behavioural variation might determine vector capacity and adaptation to changing environment. it is thus necessary to clarify the species distributions and the influences of environment on behavioural heterogeneity. | 2007 | 17341297 |
| high levels of population structure caused by habitat islands in the malarial vector anopheles scanloni. | the genetic structure of four populations of the malarial vector anopheles scanloni in thailand was studied using mitochondrial dna sequences. four highly divergent lineages were observed, all with signals of population expansion. since an. scanloni is restricted to 'islands' of limestone karst habitat, this suggests there is a metapopulation-type dynamic in this species, with restricted gene flow, extinctions and drift all contributing to lineage divergence. historical environmental change and ... | 2007 | 17426732 |
| genetic diversity and population structure of plasmodium falciparum in thailand, a low transmission country. | the population structure of the causative agents of human malaria, plasmodium sp., including the most serious agent plasmodium falciparum, depends on the local epidemiological and demographic situations, such as the incidence of infected people, the vector transmission intensity and migration of inhabitants (i.e. exchange between sites). analysing the structure of p. falciparum populations at a large scale, such as continents, or with markers that are subject to non-neutral selection, can lead t ... | 2009 | 19602241 |
| the dominant anopheles vectors of human malaria in the asia-pacific region: occurrence data, distribution maps and bionomic precis. | abstract: background: the final article in a series of three publications examining the global distribution of 41 dominant vector species (dvs) of malaria is presented here. the first publication examined the dvs from the americas, with the second covering those species present in africa, europe and the middle east. here we discuss the 19 dvs of the asian-pacific region. this region experiences a high diversity of vector species, many occurring sympatrically, which, combined with the occurrence ... | 2011 | 21612587 |
| 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 |
| malaria ecology along the thailand-myanmar border. | malaria in southeast asia frequently clusters along international borders. for example, while most of thailand is malaria free, the border region shared with myanmar continues to have endemic malaria. this spatial pattern is the result of complex interactions between landscape, humans, mosquito vectors, and malaria parasites. an understanding of these complex ecological and socio-cultural interactions is important for designing and implementing malaria elimination efforts in the region. this art ... | 2015 | 26437860 |
| diversity of anopheles mosquitoes in binh phuoc and dak nong provinces of vietnam and their relation to disease. | human malaria is still a burden in dak nong and binh phuoc provinces in south-central vietnam that border cambodia. several anopheles species that transmit human malarial plasmodium may also transmit wuchereria bancrofti, the nematode that causes bancroftian lymphatic filariasis. the objective of this study was to investigate the role of anopheles species in the transmission of these two pathogens in the two highly malaria endemic provinces of vietnam. | 2014 | 25008314 |
| the insecticide resistance status of malaria vectors in the mekong region. | knowledge on insecticide resistance in target species is a basic requirement to guide insecticide use in malaria control programmes. malaria transmission in the mekong region is mainly concentrated in forested areas along the country borders, so that decisions on insecticide use should ideally be made at regional level. consequently, cross-country monitoring of insecticide resistance is indispensable to acquire comparable baseline data on insecticide resistance. | 2008 | 18534006 |
| freshwater biodiversity and aquatic insect diversification. | inland waters cover less than 1% of earth's surface but harbor more than 6% of all insect species: nearly 100,000 species from 12 orders spend one or more life stages in freshwater. little is known about how this remarkable diversity arose, although allopatric speciation and ecological adaptation are thought to be primary mechanisms. freshwater habitats are highly susceptible to environmental change and exhibit marked ecological gradients. standing waters appear to harbor more dispersive species ... | 2013 | 24160433 |
| predicted distribution of major malaria vectors belonging to the anopheles dirus complex in asia: ecological niche and environmental influences. | methods derived from ecological niche modeling allow to define species distribution based on presence-only data. this is particularly useful to develop models from literature records such as available for the anopheles dirus complex, a major group of malaria mosquito vectors in asia. this research defines an innovative modeling design based on presence-only model and hierarchical framework to define the distribution of the complex and attempt to delineate sibling species distribution and environ ... | 2012 | 23226292 |
| species diversity and biting activity of anopheles dirus and anopheles baimaii (diptera: culicidae) in a malaria prone area of western thailand. | a survey of adult anopheline mosquito diversities, collected from september 2009 to august 2010, was conducted in a malaria endemic area of western thailand. two anopheline species complexes, dirus and minimus, along with the maculatus group were observed. of several species documented from within each complex and group, four important malaria vectors were identified, including an. dirus, an. baimaii, an. minimus, and an. sawadwongporni. information on biting activity and host preference for any ... | 2012 | 23009133 |
| partial mitochondrial dna sequences suggest the existence of a cryptic species within the leucosphyrus group of the genus anopheles (diptera: culicidae), forest malaria vectors, in northern vietnam. | during the last decade, southeast asian countries have been very successful in reducing the burden of malaria. however, malaria remains endemic in these countries, especially in remote and forested areas. the leucosphyrus group of the genus anopheles harbors the most important malaria vectors in forested areas of southeast asia. in vietnam, previous molecular studies have resulted in the identification of only anopheles dirus sensu stricto (previously known as an. dirus species a) among the leuc ... | 2010 | 20433694 |
| molecular identification of four members of the anopheles dirus complex using the mitochondrial cytochrome c oxidase subunit i gene. | precise mosquito species identification is an essential step for proper management and control of malaria vectors. misidentification of members in the anopheles dirus complex, some which are primary malaria vectors in thailand and mainland southeast asia, remains problematic because of indistinguishable or overlapping morphological characters between sibling species. moreover, there is a need for alternative methods, since the existing molecular techniques in the literature are not entirely sati ... | 2017 | 29369036 |