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transmission of japanese encephalitis virus in culex pseudovishnui & c. tritaeniorhynchus mosquitoes.studies on the transovarial transmission of japanese encephalitis virus (jev) by orally infected female c. pseudovishnui showed that these mosquitoes were capable of transmitting jev by bite to susceptible hosts. infected females also transmitted the virus vertically to its first generation progeny. in another experiment, c. tritaeniorhynchus was also shown capable of transmitting the virus vertically to its first generation progeny. however, there was no apparent difference in transovarial tran ...19911660033
evaluation of the water fern azolla microphylla for mosquito population management in the rice-land agro-ecosystem of south india.the floating water fern azolla microphylla kaulfess was evaluated as a biocontrol agent against mosquitoes breeding in rice fields in tamil nadu, south india. anopheles subpictus grassi, culex pseudovishnui colless and culex tritaeniorhynchus giles were the predominant species of mosquitoes, with peak densities of late instar larvae and pupae occurring during the second week after transplantation of rice seedlings of short-term (c. 80 days from transplantation to harvest) or medium-term (c. 95 d ...19911768923
isolation of japanese encephalitis virus from culex pseudovishnui colless, 1957 (diptera: culicidae) in goa.a strain of japanese encephalitis virus was isolated from a pool of 54 female c. pseudovishnui colless, 1957. the mosquitoes were collected in august 1988 during the period of epidemic of je. this is the first report of isolation of je virus from mosquitoes in goa in the western coastal belt of peninsular india. in view of this isolation, c. pseudovishnui acquires greater importance, even though its density and relative prevalence during the current study was found to be far lower than c. tritae ...19902269503
preliminary field evaluation of a malaysian isolate of bacillus thuringiensis serotype h-14 against culex pseudovishnui. 19902402673
morphological characters of culex pseudovishnui larvae from malaysia, japan and formosa. 19725028864
arbovirus infections in sarawak: the isolation of kunjin virus from mosquitoes of the culex pseudovishnui group. 19705500097
the occurrence of culex pseudovishnui in iran. 19846742930
host feeding patterns of culex vishnui sub group of mosquitoes in dibrugarh district of assam.the host feeding patterns of three species of mosquitoes belonging to vishnui sub group, culex tritaeniorhynchus, culex vishnui and culex pseudovishnui, the most prevalent species in dibrugarh district were determined by analysing their blood meals. all 3 species were found be essentially zoophilic. high percentage of pig feeding was observed in culex tritaeniorhynchus (40 per cent) and culex vishnui (35.3 per cent) in comparison to other prevalent species in this area. in contrast culex pseudov ...19947868835
comparisons of rice field mosquito (diptera: culicidae) abundance among areas with different agricultural practices in northern thailand.adult mosquitoes were collected from 3 areas in northern thailand with different availabilities of rice fields for larval habitats by using blacklight, truck, and pig-baited traps. culex tritaeniorhynchus giles and culex gelidus theobald were dominant in all samples. significant study-area differences were found in light and truck trap collections for cx. tritaeniorhynchus and cx. gelidus, but not for culex vishnui theobald + culex pseudovishnui colless. in pig-baited sample area differences wer ...19989775619
a polymerase chain reaction based method for the detection of culex quinquefasciatus (diptera: culicidae).culex quinquefasciatus say is the major vector of the filarial parasite wuchereria bancrofti (cobbold) which causes lymphatic filariasis in humans. a repetitive dna sequence from the genome of c. quinquefasciatus has been cloned and completely sequenced. the 693 bp cloned fragment had an a+t content of 72%. dot matrix analysis of the fragment did not reveal any direct or inverted repeats within it. southern blot analysis using a variety of restriction enzymes appeared to indicate that the cloned ...200010948365
first outbreak of japanese encephalitis in two villages of dharmapuri district in tamil nadu.three cases of japanese encephalitis (je) were reported for the first time from two villages in krishnagiri health unit district of tamil nadu during november 1999. two children died and one developed neurological sequelae. a serological survey was conducted in these villages to find out the prevalence of je antibodies among children below 15 yr of age in addition to the epidemiological investigations.200011247195
[checklist of mosquitoes (culicidae) in korea]a systematic mosquito taxonomic study in korea was established by lee in 1971. since then, many species have been recorded as new to korea. however, much of this taxonomic information has been distributed in a number of scientific publications. this work attempts to combine this information into a single document, as well as to synthesize revised taxonomic synonyms of species occurring in korea. four species, culex vorax, culex kangi, aedes kobayashii and culiseta kanayamensis listed in our prev ...198712886074
species composition of mosquito fauna in ranau, sabah, malaysia.the adult population and species composition of mosquitoes collected in ranau, sabah are described. a total of 5956 mosquitoes representing 8 genera and 41 species were collected using human landing catch, indoor and outdoor. anopheles maculatus was the most common species (15.6%) followed by culex quinquefasciatus (12.8%), culex pseudovishnui (12.1%), anopheles balabacensis (11.1%), culex vishnui (9.7%), aedes vexans (9.6%), culex tritaeniorhyncus (6.6%), anopheles donaldi (5.6%) and others in ...200819287362
evaluation of permanet 2.0 mosquito bednets against mosquitoes, including anopheles minimus s.l., in india.wash resistance and field bioefficacy of permanet 2.0 nets, long lasting insecticidal nets, against mosquitoes were evaluated in assam, northeastern india. after repeated hand washings at 12-day intervals a decline in the mosquito killing ability of permanet nets was noted (trend chi2 38.9, p < 0.0001), yet these nets retained good insecticidal efficacy for up to 15 wash cycles, producing a 72.5% mean mortality of an. minimus 24 hours after a 3-minute exposure in world health organization cones ...200919842429
emergence of genotype i of japanese encephalitis virus as the dominant genotype in asia.japanese encephalitis virus (jev), a mosquito-borne zoonotic pathogen, is one of the major causes of viral encephalitis worldwide. previous phylogenetic studies based on the envelope protein indicated that there are four genotypes, and surveillance data suggest that genotype i is gradually replacing genotype iii as the dominant strain. here we report an evolutionary analysis based on 98 full-length genome sequences of jev, including 67 new samples isolated from humans, pigs, mosquitoes, midges. ...201121697481
comparison of genotypes i and iii in japanese encephalitis virus reveals distinct differences in their genetic and host diversity.japanese encephalitis (je) is an arthropod-borne disease associated with the majority of viral encephalitis cases in the asia-pacific region. the causative agent, japanese encephalitis virus (jev), has been phylogenetically divided into five genotypes. recent surveillance data indicate that genotype i (gi) is gradually replacing genotype iii (giii) as the dominant genotype. to investigate the mechanism behind the genotype shift and the potential consequences in terms of vaccine efficacy, human c ...201425056890
insights into the evolutionary history of japanese encephalitis virus (jev) based on whole-genome sequences comprising the five genotypes.japanese encephalitis virus (jev) is the etiological agent of japanese encephalitis (je), one of the most serious viral encephalitis worldwide. five genotypes have been classified based on phylogenetic analysis of the viral envelope gene or the complete genome. previous studies based on four genotypes have reported that in evolutionary terms, genotype 1 jev is the most recent lineage. however, until now, no systematic phylogenetic analysis was reported based on whole genomic sequence of all five ...201525884184
ecology of west nile virus in north america.the introduction, dispersal and establishment of west nile virus in north america were reviewed, focusing on factors that may have enhanced receptivity and enabled the invasion process. the overwintering persistence of this tropical virus within temperate latitudes was unexpected, but was key in the transition from invasion to endemic establishment. the cascade of temporal events allowing sporadic amplification to outbreak levels was discussed within a future perspective.201324008376
monitoring of malaria, japanese encephalitis and filariasis vectors.vector monitoring in military stations would help in protecting the armed forces from vector borne diseases such as malaria, japanese encephalitis and filariasis.201324843200
entomological investigations into an epidemic of japanese encephalitis (je) in northern districts of west bengal, india (2011-2012).japanese encephalitis (je) is one of the most important arboviral diseases of human beings with outbreaks in many parts of southeast asia including india. we present the entomological findings of an outbreak occurred in northern part of west bengal during 2011-2012 with special emphasis on the role of je vectors in different seasons.025027086
sampling design influences the observed dominance of culex tritaeniorhynchus: considerations for future studies of japanese encephalitis virus transmission.mosquito sampling during japanese encephalitis virus (jev)-associated studies, particularly in india, has usually been conducted via aspirators or light traps to catch mosquitoes around cattle, which are dead-end hosts for jev. high numbers of culex tritaeniorhynchus, relative to other species, have often been caught during these studies. less frequently, studies have involved sampling outdoor resting mosquitoes. we aimed to compare the relative abundance of mosquito species between these two pr ...201626726881
detection of west nile virus in six mosquito species in synchrony with seroconversion among sentinel chickens in india.west nile virus (wnv) is a zoonotic flavivirus maintained in mosquito-bird transmission cycle. although humans are accidental hosts, fatal outcomes following wnv infection have been reported from india. studies have identified wnv as an important etiological agent causing acute encephalitis syndrome in assam, northeast india. while circulation of wnv is evident, the role of vectors and avian hosts involved in the transmission remains unclear. in this study we identified local mosquito species fo ...201728061903
the west nile virus-like flavivirus koutango is highly virulent in mice due to delayed viral clearance and the induction of a poor neutralizing antibody response.the mosquito-borne west nile virus (wnv) is responsible for outbreaks of viral encephalitis in humans, horses, and birds, with particularly virulent strains causing recent outbreaks of disease in eastern europe, the middle east, north america, and australia. previous studies have phylogenetically separated wnv strains into two main genetic lineages (i and ii) containing virulent strains associated with neurological disease. several wnv-like strains clustering outside these lineages have been ide ...201424942584
lead levels of culex mosquito larvae inhabiting lead utilizing factory.to determine lead level primarily in culex quinquefasciatus (cx. quinquefasciatus), and culex gelidus (cx. gelidus) larvae inhabiting lead consuming factories, and to putatively estimate eco-toxicological impact of effluents from the firms.023569727
isolation of japanese encephalitis virus and a novel insect-specific flavivirus from mosquitoes collected in a cowshed in japan.cattle do not generally appear to develop severe viremia when infected with japanese encephalitis virus (jev), and they can be infected without showing clinical signs. however, two cattle in japan recently died from jev infection. in this study, we investigated the presence of different species of mosquitoes and flavivirus in a cowshed in the southwest region of japan. in this cowshed, the two most common species of mosquitoes collected were culex tritaeniorhynchus (including culex pseudovishnui ...201526085283
first indigenous transmission of japanese encephalitis in urban areas of national capital territory of delhi, india.until 2010, no japanese encephalitis (je) had been reported from delhi. upon report of four confirmed cases of je in september 2011, detailed investigations were carried out to determine whether the cases were imported or indigenous.201323682856
distribution of mosquitoes and mosquito-borne viruses along the china-myanmar border in yunnan province.a total of 54,673 mosquitoes were collected at 11 sites located near the china-myanmar border in the western part of yunnan province during july and august 2007. there were 29 species in 4 genera identified from the collections, including 12 species of culex, 12 species of anopheles, 3 species of aedes, and 2 species of armigeres. culex tritaeniorhynchus giles (67.9%, 37,119/54,673) and anopheles sinensis wiedemann (25.9%, 14,170/54,673) were the most abundant species in this investigation. viru ...201222627302
antigen distribution pattern of west nile virus in culex tritaeniorhynchus, culex vishnui and culex pseudovishnui mosquitoes.distribution of west nile (wn) virus antigen in different tissues of mosquitoes was studied in three species viz., culex tritaeniorhynchus, c. vishnui and c. pseudovishnui. overall per cent positivity was higher in the intra thoracically inoculated as compared to the orally infected mosquitoes, suggesting the existence of a midgut barrier. in a small number of mosquitoes salivary glands were found negative even though fluorescence was seen in the respective head squashes, suggesting salivary gla ...200112206036
studies on japanese encephalitis vector mosquitoes in selangor, malaysia.mosquito collections were carried out from may to june 1992 and from september to december 1992 in an area where a case of japanese encephalitis was confirmed. a total of 40,072 mosquitoes belonging to 35 species and 8 genera were collected. the dominant species in that locality were culex vishnui, culex tritaeniorhynchus, culex pseudovishnui, culex gelidus, aedes butleri, and mansonia uniformis.19938126485
susceptibility status of two species of japanese encephalitis vectors to insecticides in the thar desert, district bikaner (rajasthan).susceptibility tests were conducted on the adults of two species of japanese encephalitis vectors viz., culex pseudovishnui and c. tritaeniorhynchus against diagnostic doses of ddt, dieldrin, malathion, fenitrothion, propoxur and permethrin at different exposure duration. c. pseudovishnui was found susceptible to permethrin and resistant to dieldrin and propoxur while c. tritaeniorhynchus was found susceptible to permethrin and resistant to ddt, dieldrin, fenitrothion and propoxur. a verificatio ...19957601496
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