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dirofilaria immitis and its potential mosquito vectors in central new york state.screening of 25,822 dog blood samples indicated approximately a 1% infection rate with dirofilaria immitis. dipetalonema reconditum microfilariae were found in approximately 2% of 1,876 feral dogs examined. laboratory experimentation indicated that 6 of 10 local mosquito species examined allowed successful extrinsic incubation of d immitis. indices of experimental infection indicated aedes triseriatus and anopheles quadrimaculatus were excellent hosts for d immitis, but other factors considered, ...197720828
cache valley virus: isolations from mosquitoes in saskatchewan, 1972-1974.eighteen isolations of cache valley virus (bunyaviridae) were obtained from a total of 113,694 mosquitoes collected in saskatchewan during the summers of 1972 to 1974. most of the isolations were from mosquitoes collected during august. culiseta inornata, the most abundant mosquito (38% of total collected), had the highest minimum vector-infection rate (0.83 isolations per 1000 mosquitoes). the virus was also isolated from culex tarsalis and aedes vexans. it is indicated in the isolations that t ...197938897
[identification of a group a arbovirus isolated in the far east].strains nos. 296 and 260 isolated from aedes vexans and culex pipiens mosquitoes in the ussr far east in 1971 and 1973, respectively, were identified. the size of the viruses was found to be about 50 nm. both strains were pathogenic for 2--3-day-old and 3--4-week-old mice by the intracerebral, subcutaneous and intraperitoneal routes, agglutinated goose red blood cells at the optimal ph 6.0. the strains were identical to each other and by their antigenic structure were classified as semliki fores ...1975240231
the influence of carbohydrate-feeding and insemination on oviposition of an indiana strain of aedes vexans (diptera: culicidae). 1977903927
[mass tracing of aedes vexans vexans by means of radioactive phosphorus for the study of their flight range from the breeding sites].in the valley of the upper yenisei iv instar larvae of a. vexans vexans were traced with 32p and then 1.86 mln imagos were released. among 442 857 mosquitoes caught after hatching 243 were traced. most of the traced individuals did not yet start looking for prey and were caught during the first five days near the hatching site. 14 radioactive females were caught within 4.5 km distance from the hatching site in the following weeks.19761026907
experimental transmission of trivittatus virus (california virus group) by aedes trivittatus.the mosquito, aedes trivittatus, when fed through a membrane a trivittatus virus dosage of 10(3.4) to 10(5.5) suckling mouse ld50/0.03 ml of blood, transmitted the virus to suckling mice. virus multiplication indicative of a biological vector occurred in this species. when aedes vexans and a. triseriatus ingested similar doses of trivittatus virus, both the infection and transmission rates were low and virus multiplication was poor. these results, added to evidence based on virus isolations from ...19761259079
factors influencing the activity of bacillus thuringiensis var. israelensis treatments.environmental factors influence the effectiveness of microbial control agents in mosquito control programs. four of these factors (water temperature, larval density, sunlight and the effect of associated filter feeders) were studied with bacillus thuringiensis var. israelensis under laboratory and semifield conditions in europe using different instars of aedes vexans, ae. aegypti and culex pipiens. bioassays conducted at a low temperature (5 degrees c) yielded 10-fold higher lc50 and lc90 values ...19921357088
simultaneous field comparison of evening temporal distributions of nectar and blood feeding by aedes vexans and ae. trivittatus (diptera: culicidae) in ohio.nectar- and blood-feeding time distributions of aedes vexans (meigen) and aedes trivittatus (coquillett) were determined from collections of mosquitoes attempting to feed on flowers and human bait during six nights in an ohio field. distributions of nectar and blood feeding were different in ae. vexans on three of five nights when analyses were possible, and they were different in pooled ae. trivittatus data. higher proportions of blood feeders appeared in earlier time intervals, but both nectar ...19921495059
resistance levels of nine mosquito species to 4% ddt in phnom penh, kampuchea.according to the standard who method criteria, the mosquitoes anopheles campestris and culex vishnui were found to be susceptible to ddt in the territory of phnom penh. an. vagus and an. sinensis were approximately at the limit of susceptibility and the remaining five species (aedes vexans, cx. tritaeniorhynchus, cx. fuscocephala, cx. gelidus, cx. bitaeniorhynchus) were found to be more or less resistant. except for an. vagus, the males of all species were more susceptible than the females.19911808034
the mosquitoes (diptera: culicidae) in maliuc (danube delta)--faunistical and ecological data.the paper reports the results of the survey of the mosquito fauna in the maliuc area (danube delta) in 1983-1985. 16 mosquito species have been recorded in the area during the investigations: anopheles maculipennis--complex, an. hyrcanus, uranotaenia unguiculata, coquillettidia richiardii, culiseta annulata, aedes vexans, ae. cinereus, ae. caspius, ae. dorsalis, ae. excrucians, ae. flavescens, ae. leucomelas, ae. intrudens, culex pipiens, c. martinii, cx. modestus. they have been captured by lig ...19901983702
[the presence of aedes (stegomyia) albopictus in the fiji islands].an entomological survey conducted at the international airports of the fiji islands showed aedes albopictus breeding in the protective area of nadi airport. no aedes aegypti nor anopheles accidentally imported have been seen during the visit. aedes vexans, a. pseudoscutellaris, a. burnetti, a. vigilax, culex annulirostris, c. quinquefasciatus and a species of the pipiens complex have been collected incidentally out of airport areas. due to the presence of aedes albopictus, a new and important ep ...19902208470
effects of release rates on the range of attraction of carbon dioxide to some southwestern ontario mosquito species.the effects of release rates of 0, 250, 500, 1,000 and 4,000 ml/min on the range of attraction of carbon dioxide to some southwestern ontario mosquito species was determined using ramp traps placed at 3, 7, 11, 15 and 19 m from a central pressurized cylinder. for female aedes vexans, spring aedes spp. and anopheles walkeri, an increase in the release rate of co2 from 1,000 to 4,000 ml/min resulted in extension of the range of attractiveness from between 3-7 m to between 7-11 m; rates of 500 and ...19892565369
correlation between wing length and protein content of mosquitoes.wing length and protein content were compared in individual specimens of male and nonbloodfed, nongravid female mosquitoes. the following groups were tested: field-collected and colonized aedes aegypti, field-collected culex nigripalpus and aedes vexans, and colonized culex quinquefasciatus and psorophora columbiae. the correlation coefficient varied from 0.91 in ae. aegypti males to 0.98 in ae. vexans females, and in each group the p value was less than 0.001. this close correlation suggests th ...19892568393
mosquito collection in endemic areas of japanese encephalitis in hokkaido, japan.a study was conducted during 1985 and 1986 to evaluate the roles of mosquito species as possible vectors of japanese encephalitis (je) virus in hokkaido. the number of culex tritaeniorhynchus was very low among the four pig farms where outbreaks of abortion caused by je virus were observed in swine populations. at one farm near sapporo, only one cx. tritaeniorhynchus was found among a total of 510 mosquitoes collected during the survey period from july to october 1985, even when je virus activit ...19892575185
prevalence of parasitism of adult aedes vexans by a mermithid (nematoda: mermithidae) in oklahoma. 19892708984
[isolation of tahyna virus from mosquitoes in 2 different european natural foci].collecting during two periods, from september 4, 1979, to september 12, 1980, and from august 17 to september 10, 1981, a total of 45,705 mosquitoes was caught for virus isolation studies in 6 different regions in germany and the netherlands (lower rhine area, upper rhine area near germersheim, upper main area near baunach, amper moos), in austria (eastern shore of lake neusiedl), and in italy (isonzo river delta). 25 mosquito species were identified belonging to the genera aedes, culex, culiset ...19852860760
mosquito surveillance employing new jersey light traps on indian reservations in iowa, nebraska and south dakota in 1984 and 1985.a mosquito surveillance program was established in 1983 on indian reservations in iowa, nebraska and south dakota. standard new jersey light traps were operated on 12 reservations throughout the summer seasons in 1984 and 1985. rainfall levels in general were higher than normal at all sites in 1984 but were lower than normal at most sites in 1985. aedes vexans was the most abundant species collected on all reservations and culex tarsalis second in abundance. man-biting collections of mosquitoes ...19872904939
species composition and feeding success of mosquitoes attracted to caged dogs in indiana.a field study using caged dogs in mosquito bait traps was conducted in eastcentral indiana to determine the species composition of mosquitoes coming to feed. fourteen species of mosquitoes from 5 genera were collected; aedes trivittatus predominated. feeding success rates were measured as the percentage of mosquitoes collected that had a fresh blood meal. the species having the highest rates were: culex erraticus, aedes stimulans and ae. trivittatus. aedes vexans and cx. pipiens/restuans had mar ...19852906663
occurrence and seasonal incidence of mosquitoes on indian reservations in iowa, nebraska and south dakota during 1983.a mosquito surveillance program designed to prevent future human cases of western equine encephalitis or saint louis encephalitis was established in 1983 on indian reservations under the jurisdiction of the aberdeen area indian health service in iowa, nebraska and south dakota. standard new jersey light traps were operated on all reservations throughout the summer season while cdc miniature and encephalitis virus surveillance traps were employed for shorter periods of time on 4 reservations. aed ...19862906969
effects of larval nutrition on the host-seeking behavior of adult aedes aegypti mosquitoes.adult female aedes aegypti that were reared on a suboptimal diet as larvae were less likely to engage in host-seeking behavior than were adults derived from larvae reared on an optimal diet. a postemergence carbohydrate diet of either 1 or 10% sucrose solution did not affect this response. when the progeny of field-collected aedes vexans were reared in the laboratory, the adults were significantly larger than their parents. this indicated that the larvae of the field population were not as adequ ...19883193101
efficacy of two formulations of bacillus thuringiensis var. israelensis (h-14) against aedes vexans and safety to non-target macroinvertebrates.an experimental sandoz formulation of bacillus thuringiensis var. israelensis (san 402 sc 98) was several times more effective than abbott abg 6188 against larvae of aedes aegypti and ae. vexans in the laboratory. field applications of san 402 sc 98 at 0.25 liter/ha and abg 6188 at 1.00 liter/ha resulted in more than 97% control of ae. vexans larvae after 48 hours, with residual activity of 24 hours or less. the amphipod, hyallela azteca, and 4 species of water beetles were apparently unaffected ...19883199115
assay of lipids, glycogen and sugars in individual mosquitoes: correlations with wing length in field-collected aedes vexans. 19883225576
[isolation of strains of negishi virus in khabarovsk territory].two virus strains isolated from aedes vexans nipponi and aedes vexans vexans in 1976 and 1978, respectively, in khabarovsk territory were identified as negishi virus. among 176 human sera, 22.7% were found to contain complement-fixing antibodies to negishi virus soluble antigen.19873554754
partly colored larva, an autosomal recessive lethal mutation in the floodwater mosquito aedes vexans.a first mutation in a laboratory strain of the floodwater mosquito aedes vexans is described. partly colored larva (pcl) is inherited monofactorially as a recessive autosomal lethal, causing only dark coloration of the head capsule, the saddle on abdominal segment x and the respiratory siphon during the 4th larval stage. all mutants die in the 4th larval (49%) or pupal stage. the sex-linked mutant white eye (w) was used in crosses to show autosomal inheritance.19853880210
[sensitivity of aedes vexans meig. mosquitoes to some insecticides in the khabarovsk region]. 19714105482
quantitative relationships of tahyna virus and the mosquito aëdes vexans. 19664380773
ii. morphological and cultural characteristics of culiseta inornata and aedes vexans mosquito cell lines. 19714401113
photoperiod and temperature influences on diapause in eggs of the floodwater mosquito aedes vexans (meigen) (diptera: culicidae). 19724654693
[detection of parasitic fungus coelomomyces psorophorae couch (phycomycetes: blastocladiales) in mosquitoes, aedes vexans meigen, in the astrakhan region]. 19734769396
the aedes vexans problem. 19675617577
fluctuations in distribution and abundance of aedes vexans (meigen) in salt lake county. 19675617579
mermithid parasites of the mosquito aedes vexans meigen in british columbia. 19685725461
uptake, transfer, and loss of p32 during metamorphosis, mating, and oviposition in aedes vexans. 19665976100
[remarks on the biometry of the imagos of aedes vexans meig. in the hodonin region in the year of 1966]. 19676062269
[pathogenic properties of the leiv23 astrakhan strain of batai virus for primates].pathogenic properties of batai virus, leiv23 astrakhañ strain, isolated from aedes vexans mosquitoes in astrakhañ region were studied comparatively. the degree of susceptibility to the virus of green monkeys and rodents (white mice, syrian hamsters), and the pattern of lesions produced by the virus in organs of these animals were established. the virus was shown to have a comparatively wide host range affecting phylogenetically far distant animals. monkeys were found to have virus-carrier state ...19836230800
getah virus in aedes vexans nipponii and culex tritaeniorhynchus: vector susceptibility and ability to transmit.vector competences of aedes (ae.) vexans nipponii (nip.) and culex (cx.) tritaeniorhynchus to getah virus were assessed by using a membrane feeding technique. the getah virus was present at high titer in both species of mosquitoes after 21 days of extrinsic incubation at 28 degrees c. infection rates on 21 post-feeding were 100 per cent (4/4) for ae. vexans nip. at a virus dosage of 10(5.3) pfu/ml and 60 per cent (3/5) for cx. tritaeniorhynchus at similar virus dosage. more than 10(3.5) pfu of v ...19836312927
[finding of the subspecies aedes vexans nipponii theobald 1907 in georgia]. 19826460926
variations in the blood-feeding patterns of aedes vexans and aedes trivittatus (diptera: culicidae). 19846694179
aedes vexans and aedes sierrensis (diptera: culicidae): potential vectors of dirofilaria immitis in tehama county, northern california, usa. 19827120293
response of iowa mosquito populations to unusual precipitation patterns as measured by new jersey light trap collections.new jersey light trap data from 1993, a year with unusually high amounts of precipitation, and 1994 were compared with mean light trap counts for the previous 8-10 years in each of 6 locations. the study took place in iowa. in 1993, aedes trivittatus and culex tarsalis populations were unchanged. anopheles punctipennis and culex pipiens complex populations were significantly higher, and aedes vexans populations increased in all 6 sites, significantly so in 2 sites. species composition was unchan ...19957595446
dependence of co2-baited suction trap captures on temperature variations.in order to provide better standardized co2-baited trap samples, the relationship between sample size and evening temperatures was studied. adult mosquitoes were collected for 3 h centered on sunset by an automatic interval suction trap baited with co2 in the upper rhine valley, germany. aedes vexans females were most abundant, and their blood-seeking activity showed a significant correlation with the evening's average temperature (r = 0.76, p < or = 0.05). a higher degree of correlation was obt ...19957616192
potential mosquito vectors of dirofilaria immitis in bernalillo county, new mexico.the susceptibility of aedes vexans, culex quinquefasciatus, and culex tarsalis to dirofilaria immitis infections was evaluated in bernalillo co., new mexico. mosquitoes that had taken a blood meal from a d. immitis-infected dog were dissected and observed for developing larvae. infection rates for ae. vexans, cx. quinquefasciatus, and cx. tarsalis were 68.9, 40.6, and 30.2%, respectively. infective d. immitis larvae developed after a minimum of 8 days in ae. vexans vs. 14 days in both cx. quinqu ...19957616197
[method of determining the actual fertility of female blood-sucking mosquitoes with the example of aedes vexans meigen (diptera, culicidae)]. 19806445480
records of mosquito-parasitic mermithid nematodes in the northcentral united states.mermithid parasites (nematoda: mermithidae) were observed in 11 mosquito species in 22 counties of indiana, michigan, minnesota, ohio and wisconsin. natural hosts included adult aedes vexans, ae. canadensis, ae. cinereus, ae. diantaeus, ae. punctor, anopheles punctipennis and coquillettidia perturbans and larvae of ae. abserratus, ae. canadensis, ae. cinereus, ae. communis, ae. diantaeus, ae. provocans, ae. punctor, ae. stimulans and cq. perturbans. these are the first records of such parasites ...19937902415
use of granulated fertilizers with actellic ec 50 insecticide in the control of mosquito larvae.granulated fertilizers [ammonium nitrate, synthetic fertilizer] were used as carriers to prepare an insecticide granulate suitable for the control of aedes cantans and aedes vexans mosquito larvae under field conditions. the insecticide granulate was obtained by mixing 1 volume unit of actellic ec 50 with 50 volume units of fertilizer. the optimal dose required to ensure and effective control of aedes mosquito larvae was 2--5 g of granulate per 1 m3 of water [i.e. 2--5 kg/ha per each 1- cm depth ...19816262402
malathion resistance in mosquitoes from charleston and georgetown counties of coastal south carolina.susceptibility tests were conducted using the world health organization diagnostic test procedure on strains of aedes taeniorhynchus, aedes sollicitans, aedes vexans, and culex nigripalpus collected from several localities in charleston and georgetown counties of south carolina. aedes taeniorhynchus was resistant to malathion (mortality 1.0-54.4%) but not to propoxur, permethrin, or fenitrothion. there also were indications that ae. sollicitans and cx. nigripalpus were resistant to malathion, bu ...19947912262
host range tests with edhazardia aedis (microsporida: culicosporidae) against northern nearctic mosquitoes.twelve species of northern nearctic mosquitoes representing five genera (aedes, anopheles, culex, culiseta, and psorphora) were bioassayed for susceptibility to edhazardia aedis, an exotic, heterosporous, microsporidian parasite of the yellow fever mosquito, aedes aegypti. infections were achieved in aedes atropalpus, aedes triseriatus, and aedes vexans following oral ingestion of uninucleate spores obtained from patently infected ae. aegypti larvae. the microsporidium underwent normal vegetativ ...19947914904
comparison of recapture patterns of marked and released aedes vexans and ae. melanimon (diptera: culicidae) in the sacramento valley of california.recapture patterns of aedes vexans (meigen) and aedes melanimon dyar were compared in a mark-release-recapture study conducted on the colusa national wildlife refuge, colusa county, california, from 15 august to 2 september 1988. the 2.0% recapture rate for ae. vexans females was significantly greater than the 0.9% rate for ae. melanimon females. daily survivorship of 0.70 for ae. vexans females was significantly lower than the 0.84 estimate for ae. melanimon. the two species had different patte ...19947932608
aedes vexans and other potential mosquito vectors of dirofilaria immitis in minnesota. 19665969120
investigations on possible resistance in aedes vexans field populations after a 10-year application of bacillus thuringiensis israelensis.in the upper rhine valley (germany), bacillus thuringiensis var. israelensis has been widely used against floodwater mosquitoes over an area of approximately 500 km2 for more than 10 years. the susceptibility of larvae of aedes vexans field populations in 3 untreated (lake constance) and 3 treated areas (upper rhine valley) was assessed by means of bioassays with b.t.i. (bactimos wp, 6,000 aau/mg), following who guidelines. log-probit analyses and statistical evaluations of the data showed that ...19938350079
sampling studies with aedes vexans and some other wisconsin aedes (diptera: culcidae). 19655835304
characterization of cell lines derived from culiseta inornata and aedes vexans mosquitoes. 19704393461
immunoblot analysis of ige and igg binding antigens in extracts of mosquitos aedes vexans, culex tarsalis and culiseta inornata.extracts of one globally distributed mosquito species (aedes vexans) and two north american species (culex tarsalis and culiseta inornata) were prepared from heads and thoraxes. proteins of the three extracts were separated by 12% sds-page and transferred to nitrocellulose membranes for immunoblotting. immunoblotting was completed by sequential incubations of the membranes with a pooled human serum from subjects allergic to mosquito bites, monoclonal antibodies to human ige or igg, and goat anti ...19968645977
feeding rate of larval aedes vexans stimulated by food substances.feeding rates of fourth instar larvae of aedes vexans were compared by counting substrate filled gut segments after exposure to food or inert particles. food particles (wheat flour, fishmeal or yeast) were ingested approximately 3 times faster than inert particles (kaolin, pumice or synthetic cellulose). aqueous fishmeal extract accelerated ingestion of inert particles to the level of ingestion of food particles, demonstrating gustatory stimulation of larvae. absolute amounts of ingested materia ...19853880266
efficacy of bacillus sphaericus and bacillus thuringiensis var. israelensis for control of culex pipiens and floodwater aedes larvae in iowa.granular and flowable concentrate formulations of bacillus thuringiensis var. israelensis provided a 90-100% reduction in aedes vexans and culex spp. larvae in natural larval habitats. a briquet formulation of b. thuringiensis was less effective, providing a 12-76% reduction. no residual activity occurred in sites treated with b. thuringiensis. granular formulations of bacillus sphaericus (2.78-8.42 kg/ha) caused a 100% reduction in culex pipiens larvae in natural sites and artificial pools. bac ...19873504943
simulating development and survival of aedes vexans (diptera: culicidae) preimaginal stages under field conditions.ecology and population dynamics of aedes vexans (meigen), were studied for 3 yr in southern switzerland. demographic data were compiled into single and multicohort stage-frequency lifetables that indicated variability in individual developmental times and losses caused by mortality. the structure of life table matrices suggested an analysis using a timevarying distributed delay model with attrition. field data then were used to construct and validate a simulation model that input the number of 1 ...19968906902
habitat selection strategies of mosquitoes inhabiting citrus irrigation furrows.the mosquitoes aedes vexans, psorophora columbiae and psorophora howardii have recently extended their habitat distribution into citrus irrigation furrows in coastal southeastern florida. oviposition site selection was examined by correlating species abundances with water depths due to rainfall or flood irrigation. psorophora columbiae and ps. howardii oviposited low in furrows, shared similar distributional relationships to water depths and were hatched by rainfall or irrigation. aedes vexans o ...19852906662
parasitism of adult aedes vexans by a mermithid (nematoda: mermithidae) in iowa. 19892584980
host preference of mosquitoes in bernalillo county, new mexico.host preference of mosquitoes was determined using animal-baited traps. hosts used in the study were cattle, chickens, dogs, and horses. ten mosquito species representing 4 genera were collected from the animal-baited traps. aedes vexans, aedes dorsalis, culex quinquefasciatus. culex tarsalis, and culiseta inornata were used as indicator species for data analysis. greater numbers of ae. vexans, ae. dorsalis, and cs. inornata were collected from cattle and horses than from chickens or dogs. in ad ...19979152878
experimental vertical transmission of japanese encephalitis virus by culex tritaeniorhynchus and other mosquitoes.vertical transmission of japanese encephalitis virus to the f1 adult stage was demonstrated in culex tritaeniorhynchus, cx. annulus, cx. quinquefasciatus, and armigeres subalbatus. transmission to the f1 larval stage was demonstrated in cx. pipiens, aedes vexans, ae. alcasidi, and a. flavus. in cx. tritaeniorhynchus, vertical transmission rates (the percentage of parent females transmitting to progeny) varied (12-100%). filial infection rates (the percentage of progeny infected) for a given mosq ...19892567124
isolation of the spirochaete borrelia afzelii from the mosquito aedes vexans in the czech republic.during the years 1993-1995, a total of 3580 culicine mosquitoes of six species were collected in south moravia, czech republic, and examined by dark-field microscopy for the presence of borreliae. females of aedes cantans, ae. sticticus, ae. vexans, culex pipiens and cx pipiens biotype molestus (but not ae. geniculatus or culiseta annulata) harboured spirochaetes, the frequencies ranging from 0.7% to 7.8%. one isolate (br-53) from ae. vexans was identified as borrelia afzelii genospecies. the po ...19989513946
characterization of a new continuous cell line from the flood water mosquito, aedes vexans.a new cell line, um-ave1, was established from embryos of the mosquito aedes vexans. banding patterns for the isozymes lactate dehydrogenase (ldh), malate dehydrogenase (mdh), isocitrate dehydrogenase (idh), xanthine dehydrogenase (xdh), and esterases were compared with those of larval aedes vexans tissues as well as those of four other mosquito cell lines and one moth cell line. karyotype analyses confirmed that the dipteran cell lines were not contaminated with lepidopteran cells, because in a ...19911367156
[the minimum effective dosages of repellents].method of thin-layer chromatography was used to estimate threshold dosages of diethytoluamide, benzoylhexamethylene, dihexamethylenecarbamide, diethilamide of phenoxyacetic acid and dimethylphthalate for repelling of mosquitoes (aedes hexodontus, aedes vexans, aedes caspius caspius), simuliids (simulium venustrum), midges (culicoides obsoletus) and sand-flies (phlebotomus papatsi). maximum sensitivity to all the preparations studied was shown by sand-flies (phlebotomus papatasi, and most sensiti ...19751190554
multiple isolations of eastern equine encephalitis and highlands j viruses from mosquitoes (diptera: culicidae) during a 1996 epizootic in southeastern connecticut.thirty-six isolations of eastern equine encephalitis virus were obtained from 8 species of mosquitoes collected from 5 september through 18 october 1996 during an epizootic in southeastern connecticut. these included culiseta melanura (coquillett) (19 isolates), culex pipiens l. (8), culiseta morsitans (theobald) (3), aedes sollicitans (walker) (2), aedes cantator (coquillett) (1), aedes trivittatus (coquillett) (1), aedes vexans (meigen) (1), and coquillettidia perturbans (walker) (1). isolatio ...19989615549
[discovery of aedes vexans nipponi theobald (diptera, culicidae) in the ukraine]. 19751113703
[inventory of the culcinae in balagne (corsica)].we have drawn up the faunistic inventory of culicinae in balagne (corsica) in late summer. the list shows the following species (in order of frequency): culex hortensis, culex pipiens, culex impudicus, culex territans (?), culiseta longiareolata, culiseta annulata, culiseta subochrea, aedes mariae, aedes caspius, aedes vexans, anopheles claviger, anopheles maculipennis. we have observed the important recession of the maculipennis complex (only one female catched indoor) and the abundance of anop ...1978754888
cyt1aa protein of bacillus thuringiensis is toxic to the cottonwood leaf beetle, chrysomela scripta, and suppresses high levels of resistance to cry3aathe insecticidal activity of bacillus thuringiensis is due primarily to cry and cyt proteins. cry proteins are typically toxic to lepidopterous, coleopterous, or dipterous insects, whereas the known toxicity of cyt proteins is limited to dipterans. we report here that a cyt protein, cyt1aa, is also highly toxic to the cottonwood leaf beetle, chrysomela scripta, with a median lethal concentration of 2.5 ng/mm2 of leaf surface for second-instar larvae. additionally, we show that cyt1aa suppresses ...19989797292
cultural control of larval mosquito production in a fallow citrus grove used for disposal of secondary-treated sewage effluent.larval mosquito production was monitored for 16 months in the furrows of a 13.4-ha citrus grove in east-central florida used for disposal of secondary-treated sewage effluent. twenty-one species of mosquito were collected, and the 2 most abundant species were culex nigripalpus and aedes vexans. an unplanned removal of all brush and trees from the site during the study resulted in an overall decline in larval production, but species diversity remained the same.199910342271
[case of discovery of coelomomyces psorophrae couch (phycomycetes, blastocladiales) in larvae of aedes vexans in the tuva assr]. 1975234571
seasonal incidence and geographical variation of nebraska mosquitoes, 1994-95.a mosquito survey was conducted in nebraska during 1994-95. mosquitoes were collected by co2-baited cdc light traps at 11 localities throughout nebraska. total mosquitoes collected was 685,581 per trap (mean = 790) and 1,163,741 per trap (mean = 1,372) during 1994 and 1995, respectively. twenty-seven mosquito species representing 8 genera were collected. the most abundant mosquitoes collected statewide were aedes vexans at 74% of the 2-year total, culex tarsalis at 11%; aedes trivittatus, 5%; ae ...199910480112
experimental transmission of tahyna virus (california group) to wild rabbits (oryctolagus cuniculus) by mosquitoes.two wild rabbits (oryctolagus cuniculus) were subcutaneously infected with a dose of 2.6 dex. i.c. ld50/0.02 ml of extraneurally passaged tahyna virus strain "236". during the 24-72 hours interval p.i. viremia was demonstrated in both animals ranging from 1.0 to 3.42 dex. i.e. ld50/0.02. mosquitoes aedes vexans, which had fed on them, transmitted the virus to one of three other rabbits. during 24-96 hours interval after terminated feeding of infectious mosquitoes viremia was detected in this ani ...197936333
isolation of west nile virus from mosquitoes, crows, and a cooper's hawk in connecticut.west nile (wn) virus, a mosquito-transmitted virus native to africa, asia, and europe, was isolated from two species of mosquitoes, culex pipiens and aedes vexans, and from brain tissues of 28 american crows, corvus brachyrhynchos, and one cooper's hawk, accipiter cooperii, in connecticut. a portion of the genome of virus isolates from four different hosts was sequenced and analyzed by comparative phylogenetic analysis. our isolates from connecticut were similar to one another and most closely r ...199910600741
toward the incrimination of epidemic vectors of eastern equine encephalomyelitis virus in massachusetts: abundance of mosquito populations at epidemic foci.putative epidemic/epizootic eastern equine encephalomyelitis virus (eee) vector populations were compared at 15 recent (1982-90) human and horse case sites in bristol and plymouth counties in southeastern massachusetts. carbon dioxide-baited american biophysics corporation light traps were used for trapping adult mosquitoes to estimate biting risk in these foci of known transmission. population data suggest that coquillettidia perturbans, aedes canadensis, and culex salinarius are more likely ve ...199910612612
arbovirus isolations from mosquitoes in south slovakia.in the years 1973 and 1975 mosquitoes and some other diptera (tabanidae, simuliidae, hippoboscidae) were tested for virus. 13,924 mosquitoes, 75 horseflies and 60 blackflies were processed in 1973. five strains of tahyna virus were isolated from mosquito species aedes vexans. 3,378 mosquitoes and 12 sheep keds were tested for virus in 1975. twelve strains of calovo virus were isolated from anopheles maculipennis and one strain of tahyna virus was obtained from aedes vexans mosquitoes.197828998
mosquito surveillance in the demilitarized zone, republic of korea, during an outbreak of plasmodium vivax malaria in 1996 and 1997.since 1993, more than 2,000 cases of vivax malaria have occurred in the republic of korea in an epidemic that ended nearly 20 malaria-free years. most malaria has occurred in the northwestern part of the country, mainly affecting korean military personnel. as a part of an operational surveillance effort, we sampled mosquitoes in and near the demilitarized zone (paju county, kyonggi province) during the last 2 wk of july in 1996 and from may 15 to september 10 in 1997. the 1st year, landing colle ...200010901633
recovery and identification of west nile virus from a hawk in winter.west nile virus was recovered from the brain of a red-tailed hawk that died in westchester county, n.y., in february 2000. multiple foci of glial cells, lymphocytes, and a few pyknotic nuclei were observed in the brain. three to 4 days after inoculation of vero cells with brain homogenates, cytopathic changes were detected. the presence of west nile virus antigen in fixed cells or cell lysates was revealed by fluorescent antibody testing or enzyme-linked immunosorbent assay, respectively. furthe ...200010921991
measurement of mosquito aedes vexans salivary gland-specific ige and igg antibodies and the distribution of these antibodies in human sera.lack of sensitive, reproducible, and specific immunoassays has hampered the evaluation and immunotherapy of mosquito allergy.19957889383
west nile virus investigations in south moravia, czechland.seven virus isolates were obtained from 11,334 mosquitoes after the 1997 morava river flooding in south moravia (czech republic): 6 strains of tahyna bunyavirus, california antigenic group (5 from aedes vexans, 1 from ae. cinereus), and 1 strain of west nile flavivirus (wnv) from culex pipiens. in 1999, one isolate of tahyna virus from ae. vexans and one isolate of wnv from cx. pipiens were recovered from a total of 14,354 mosquitoes examined in the same area, whereas no virus was detected there ...200011192289
species composition and seasonal dynamics of mosquitoes in the belek region of turkey.the species composition and seasonal population dynamics of mosquitoes trapped in the belek region of turkey are described. eight traps (four new jersey light traps and four co2 baited traps) were activated weekly at four different sampling sites (wooded area, open field, village, and road edge). between may and december, 1997, 4,542 specimens representing seven species (culex pipiens, culex tritaeniorhynchus, aedes caspius, aedes cretinus, aedes dorsalis, aedes vexans, and culiseta annulata) we ...200011217213
vector competence of north american mosquitoes (diptera: culicidae) for west nile virus.we evaluated the potential for several north american mosquito species to transmit the newly introduced west nile (wn) virus. mosquitoes collected in the new york city metropolitan area during the recent wn virus outbreak, at the assateague island wildlife refuge, va, or from established colonies were allowed to feed on chickens infected with wn virus isolated from a crow that died during the 1999 outbreak. these mosquitoes were tested approximately 2 wk later to determine infection, disseminati ...200111296813
mosquito allergy: recombinant mosquito salivary antigens for new diagnostic tests.in patients with mosquito allergy, lack of a readily available, sensitive, specific, safe test is the major obstacle to accurate diagnosis. three recombinant mosquito salivary antigens, raed a 1 (68 kd), raed a 2 (37 kd) and raed a 3 (30 kd), from aedes aegypti have been cloned, expressed, purified and characterized. all three recombinant antigens are shared by aedes vexans and other mosquito species, and all have been found to have biologic activity in humans. in recent studies, 43% of 28 mosqu ...200111307029
short report: rift valley fever in western africa: isolations from aedes mosquitoes during an interepizootic period.thirteen strains of rift valley fever virus were isolated from aedes vexans and ae. ochraceus mosquitoes collected in october and november 1993 in northern senegal. entomologic and serologic data show that the risk of a new epizootic is increasing in this region.19957771605
protocol for the introduction of new bacillus thuringiensis israelensis products into the routine mosquito control program in germany.the efficacy of new and frequently used formulations of bacillus thuringiensis israelensis (b.t.i.) has been evaluated in the laboratory and in the field conditions under which they will be used in germany. the principles governing the successful introduction of new formulations of microbial control agents into routine programs have been highlighted. the potency of the formulations in use (teknar, bactimos, and vectobac) and their efficacy against the indigenous mosquito species aedes vexans, ae ...19947707059
cyt1ab1 and cyt2ba1 from bacillus thuringiensis subsp. medellin and b. thuringiensis subsp. israelensis synergize bacillus sphaericus against aedes aegypti and resistant culex quinquefasciatus (diptera: culicidae).the interaction of two cytolytic toxins, cyt1ab from bacillus thuringiensis subsp. medellin and cyt2ba from bacillus thuringiensis subsp. israelensis, with bacillus sphaericus was evaluated against susceptible and resistant culex quinquefasciatus and the nonsensitive species aedes aegypti. mixtures of b. sphaericus with either cytolytic toxin were synergistic, and b. sphaericus resistance in c. quinquefasciatus was suppressed from >17,000- to 2-fold with a 3:1 mixture of b. sphaericus and cyt1ab ...200111425753
natural transmission of dirofilaria immitis by aedes vexans.aedes vexans mosquitoes were reared in the laboratory from field-collected fourth instar larvae. mosquitoes were allowed to feed on dogs which were infected with dirofilaria immitis and then the mosquitoes were housed in an environmental chamber with an ambient air temperature of approximately 26 c and a relative humidity of approximately 80%. incandescent lighting was used to simulate daylight. on the 17th, 19th, 21st, and 28th day after their infected blood meal, the mosquitoes were allowed to ...19807447120
reproductive physiology of aedes (aedimorphus) vexans (diptera: culicidae) in relation to flight potential.total protein, lipid, and glycogen of aedes vexans (meigen) were related linearly to body size at eclosion. starvation after emergence led to the determination of minimal irreducible amounts of protein, lipid, and glycogen and the availability of the teneral reserves, whereas access to sucrose revealed the potential for reserve synthesis. glycogenesis and lipogenesis increased reserves approximately 10-fold the teneral value within 1 and 2 wk after emergence, respectively. carbohydrate feeding w ...200111476336
isolation of japanese encephalitis virus from mosquitoes collected in northern taiwan between 1995 and 1996.mosquito collections were carried out from may to october in 1995 and 1996 at yingko and sanhsia of taipei county and chunan of miaoli county. a grand total of 13,576 mosquitoes consisting of 13 species in 407 pools were processed and inoculated into aedes albopictus clone c6/36 cell cultures. one hundred thirty seven pools of these showed the presence of viral antigens in the infected c6/36 cell lysates which were identified by the indirect fluorescent antibody test using a monoclonal antibody ...199911561572
west nile virus infection in mosquitoes, birds, horses, and humans, staten island, new york, 2000.west nile (wn) virus transmission in the united states during 2000 was most intense on staten island, new york, where 10 neurologic illnesses among humans and 2 among horses occurred. wn virus was isolated from aedes vexans, culex pipiens, cx. salinarius, ochlerotatus triseriatus, and psorophora ferox, and wn viral rna was detected in anopheles punctipennis. an elevated weekly minimum infection rate (mir) for cx. pipiens and increased dead bird density were present for 2 weeks before the first h ...200111589172
a phylogenetic approach to following west nile virus in connecticut.the 1999 outbreak of west nile (wn) virus in the northeastern united states was the first known natural occurrence of this flavivirus in the western hemisphere. in 1999 and 2000, 82 independent connecticut wn virus isolates were cultured from nine species of birds, five species of mosquitoes, and one striped skunk. nucleotide sequences obtained from these isolates identified 30 genetic changes, compared with wn-ny99, in a 921-nt region of the viral genome beginning at nucleotide position 205 and ...200111606791
using a dynamic hydrology model to predict mosquito abundances in flood and swamp water.we modeled surface wetness at high resolution, using a dynamic hydrology model, to predict flood and swamp water mosquito abundances. historical meteorologic data, as well as topographic, soil, and vegetation data, were used to model surface wetness and identify potential fresh and swamp water breeding habitats in two northern new jersey watersheds. surface wetness was positively associated with the subsequent abundance of the dominant floodwater mosquito species, aedes vexans, and the swamp wat ...200211749741
bloodmeal sources of aedes triseriatus and aedes vexans in a southern wisconsin forest endemic for la crosse encephalitis virus.the micro enzyme-linked immunosorbent assay (elisa) was used to specifically identify bloodmeal sources of aedes triseriatus say and aedes vexans meigen collected at a site endemic for la crosse (lac) encephalitis virus. deer were the source of 65% of ae. triseriatus and 94% of aedes vexans bloodmeals, respectively. chipmunks and tree squirrels, which are considered to be the major vertebrate amplifying hosts of lac virus, were the sources of 8% and 16%, respectively, of the bloodmeals of ae. tr ...19827072901
a whole-person sampler for assessing numbers of host-seeking adult mosquitoes.the whole-person bag sampler (wpbs) is a human-baited drop-net mosquito trap for evaluating an individual's exposure to nuisance mosquitoes. a diagram of wpbs construction is given, with results from field tests. trap operator exposures of 2, 4, and 8 min did not result in a corresponding increase in mosquitoes caught in the wpbs, although simultaneous captures using a sweep net or nasci aspirator increased with the sample duration. the person baiting and operating the trap did not have a signif ...19947912259
late season commercial mosquito trap and host seeking activity evaluation against mosquitoes in a malarious area of the republic of korea.field trials evaluating selected commercially available mosquito traps variously baited with light, carbon dioxide, and/or octenol were conducted from 18-27 september 2000 in a malarious area near paekyeon-ri (tongil-chon) and camp greaves in paju county, kyonggi province, republic of korea. the host-seeking activity for common mosquito species, including the primary vector of japanese encephalitis, culex tritaeniorhynchus giles, was determined using hourly aspirator collections from a human and ...200211949213
identification of a strain of infectious bursal disease virus isolated from mosquitoes.the becht strain of infectious bursal disease virus was compared with a virus isolated from aedes vexans mosquitoes and designed 743 virus. the viruses were compared with respect to cell culture host range, cellular changes resulting from viral infections, growth curves, antigenic relationship, and physicochemical characteristics. the viruses are closely comparable in all these properties, and they are considered to be strains of the same virus. in cross comparisons by the enzyme-linked immunoso ...19816280817
eastern equine encephalitis virus in ohio during 1991.during august and september of 1991, an epizootic of eastern equine encephalitis (eee) virus in horses occurred in wayne and holmes countries, oh. this was the first recorded epizootic of eee virus in the state. twelve horses were confirmed positive for eee virus through virus isolation or seroconversion, and seven additional horses with compatible symptoms were in close spatial and temporal proximity to the confirmed cases and were presumed to have died from eee virus. the outbreak was centered ...19938094461
phylogenetic relationships of southern african west nile virus isolates.phylogenetic relationships were examined for 29 southern african west nile virus (formal name west nile virus [wnv]) isolates from various sources in four countries from 1958 to 2001. in addition, sequence data were retrieved from genbank for another 23 wnv isolates and kunjin and japanese encephalitis viruses. all isolates belonged to two lineages. lineage 1 isolates were from central and north africa, europe, israel, and north america; lineage 2 isolates were from central and southern africa a ...200212141968
potential vectors of dirofilaria immitis in macon county, alabama.a study was conducted in macon county, alabama (east-central) during the mosquito breeding seasons of 1978 and 1979 to determine the potential vector(s) of dirofilaria immitis. live mosquitoes were collected with co2-baited, miniature light traps, and small hand aspirators. these mosquitoes were subsequently dissected to determine whether immature stages of the heartworm were present. specific communities were selected based on their having at least 4 known cases of d immitis infection present i ...19826129822
strain typing of borrelia burgdorferi, borrelia afzelii, and borrelia garinii by using multiple-locus variable-number tandem repeat analysis.human lyme borreliosis (lb) is the most prevalent arthropod-borne infection in temperate climate zones around the world and is caused by borrelia spirochetes. we have identified 10 variable-number tandem repeat (vntr) loci present within the genome of borrelia burgdorferi and subsequently developed a multiple-locus vntr analysis (mlva) typing system for this disease agent. we report here the successful application of mlva for strain discrimination among a group of 41 globally diverse borrelia is ...200212454161
vector competence of california mosquitoes for west nile virus.to identify the mosquito species competent for west nile virus (wnv) transmission, we evaluated 10 california species that are known vectors of other arboviruses or major pests: culex tarsalis, cx. pipiens pipiens, cx. p. quinquefasciatus, cx. stigmatosoma, cx. erythrothorax, ochlerotatus dorsalis, oc. melanimon, oc. sierrensis, aedes vexans, and culiseta inornata. all 10 became infected and were able to transmit wnv at some level. ochlerotatus, culiseta, and aedes were low to moderately efficie ...200212498652
isolation and genetic characterization of rift valley fever virus from aedes vexans arabiensis, kingdom of saudi arabia.an outbreak of rift valley fever in the kingdom of saudi arabia and yemen in 2000 was the first recognized occurrence of the illness outside of africa and madagascar. an assessment of potential mosquito vectors in the region yielded an isolate from aedes vexans arabiensis, most closely related to strains from madagascar (1991) and kenya (1997).200212498669
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