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effects of gamma radiation on development of brugia pahangi in a susceptible strain of aedes aegypti. 1976957050
effect of host infection with plasmodium gallinaceum on the reproductive capacity of aedes aegypti. 1976965781
observations on the basal follicle numbers developed per female of two strains of aedes aegypti after being fed on hosts with different levels of microfilariae of brugia pahangi. 1976965782
effects of larval treatment with the insect development inhibitor ph60:40 on the vectorial capacity of aedes aegypti (l.) for brugia pahangi (buckley and edeson).the effects of ph60:40, an insect development inhibitor, on fourth instar larvae of aedes aegypti were investigated. apart from delayed lethal action, possible effects on the vectorial capacity of brugia pahangi were investigated. two strains of a. aegypti were used, one ddt-susceptible and a good filarial vector and the other ddt-resistant and a refractory vector. a baseline exposure was found which caused only low mortalities in both strains. the treatments did not have any appreciable effect ...1976971004
ultrastructure of the atypic muscles associated with terminalial inversion in male aedes aegypti (l).two sets of opposed, crossed muscles are present in the rotating region of the abdomen in male a. aegypti. these muscles undergo changes during rotation of the genitalia that suggest they function as the driving force for rotation. during this rotation, one muscle of each set contracts and the opposed one becomes elongated. the contracting muscles are atypic physiologically. they contract from 300 mum to about 69 mum, and this requires a period of 18 to 24 hours. they shorten only once and those ...1976974162
some effects of juvenile hormone and analogues on ovarian follicles of the mosquito aedes aegypti (diptera: culicidae). 1976978693
field competitiveness of double translocation heterozygote males of aedes aegypti (l). 1976978694
infection of an aedes aegypti cell line with infectious arbovirus-antibody complexes.aedes aegypti cells exposed to infectious complexes of wn or yf virus and homologous antiserum produced lower yields of virus over a 10-day observation period than were produced by aedes aegypti cells treated with a comparable dose of virus mixed with non-immune serum. when ae. aegypti cells were infected with wn virus mixed with mve, nta, den-2 or yf antisera the virus yield over 10 days was lower than in cell cultures infected at similar titres with mixtures of wn virus with non-immune serum. ...1976982518
a receptor sensitive to oviposition site attractants on the antennae of the mosquito, aedes aegypti. 1976985640
endemic dengue virus infection in hispaniola. i. haiti.antibodies to group b arbovirus were common among coastal populations in the haitian part of the caribbean island of hispaniola. antibodies were present in 43% of children one to five years old; prevalence in older persons increased with age. in nine asymptomatic persons serodiagnostic changes indicative of group b arbovirus were detected during six of twelve consecutive months. in port cities where antibodies were common in children, aedes aegypti indices of 50%-70% were observed; in contrast, ...1976993618
[effect of dexonucleosis virus on the imago of aedes aegypti]. 20061004291
infection of culicoides variipennis, culicoides nubeculosus, culicoides riethi and aedes aegypti with mansonella ozzardi. 19761006770
insecticide susceptibility studies in populations of aedes aegypti from maharashtra state, india. 19761024076
[detection of infusoria tetrahymena stegomyiae (keilin) in the larvae of culex pipiens molestus and aedes aegypti]. 19761025470
[confinement effect on population and phenotypic characteristics in aedes aegypti (l.)]. 19761025993
[larval density and population dynamics of aedes aegypti (l.) in laboratory conditions (author's transl)]. 19761025994
observations on the breeding habitats of aedes aegypti (l.) in jakarta, indonesia.a one-year study was done of the breeding habitats of aedes aegypti (l.) and of the water storage habits of the inhabitants in four crowded districts of urban jakarta. immature mosquitoes were found in or near houses in containers of relatively clean water used for drinking or bathing purposes. an average of 185 containers were found per 100 houses, of which 60 were positive for aedes immatures, resulting in a container index of 32%. the mean potential water storage capacity per house was 173 li ...19761030846
[results of a survey of potential dengue vectors in the neo-caledonian archipelago].the author gives the results of an entomological survey in neo-caledonian archipelago (new caledonia and loyalty islands), november-december 1972. concerning the distribution and the abundance of aedes aegypti, the local dengue vector, this study shows the presence of this culicid not only in noumea, but also all along the western developped coast of new caledonia, and in ouvea island. this constitutes a great risk of outbreak extension from noumea if a dengue virus is again imported there.19761036473
the ovary as a source of alpha-ecdysone in an adult mosquito.the ovaries of the mosquito aedes aegypti cultured in vitro secrete material that behaves like ecdysone in a radioimmunoassay. the material was identified as alpha-ecdysone by high-resolution liquid and gas-liquid chromatography. secretion reached a maximum 16 hr after a blood meal as shown by bioassay and direct determination. ovariectomy reduced the concentration of ecdysone in the adult after a blood meal. qualitative analysis of whole-body extracts indicated beta-ecdysone to be the principal ...01059110
the effect of larval selection on adult resistance to ddt in two strains of the mosquito aedes aegypti (l).evidence is presented which confirms the influence of linkage group ii on adult ddt-resistance in one strain of aedes aegypti (bangkok-mr) but not in another strain (bangkok-hr).19761062367
a new sex-linked mutant short wing in aedes aegypti.a spontaneous recessive sex-linked mutant short wing has been discovered in the mosquito aedes aegypti. it is situated less than one cross-over unit from the sex determining locus. in homozygous females, flight is impaired and the survival and fecundity is markedly subnormal. two possible uses of this gene for genetic control operations are envisaged: (a) to provide automatic sexing of males for release and (b) enhancement of the population control potential of other available genetics systems.19761062368
in vivo behavior of a sindbis virus mutant isolated from persistently infected aedes aegypti cell cultures.a mutant of the sindbis virus sv-s was found to interfere with the regular course of infection by the wild strain of the virus sv-w in a. aegypti mosquitoes and in suckling mice. in mosquitoes, this result was manifested by a reduced titer of sv-w in the presence of sv-s and by a failure of the mosquitoes to transmit sv-w. in the brains of suckling mice, in the presence of sv-s, the growth of sc inoculated sv-w was suppressed, and as a result, the usually lethal course of infection by this virus ...19751072594
infection of the mosquito aedes aegypti with infectious west nile virus-antibody complexes.aedes aegypti fed through chick skin membranes on west nile virus-homologous antiserum mixtures shown by an anti-globulin neutralization test to be highly infectious complexes (in terms of plaque formation in tissue culture) failed to become infected. control mosquitoes fed on west nile virus--normal rabbit serum mixtures containing similar or smaller amounts of infectious virus were shown to become infected. mosquitoes ingesting suspensions of west nile virus previously incubated with murray va ...19751080913
studies on the mode of action of ecdysterone in adult female aedes aegypti.injection of ecdysterone into non-blood fed adult female aedes aegypti results in a marked stimulation of aromatic-l-amino-acid decarboxylase (formerly dopa-decarboxylase) activity (schlaeger and fuchs, 1974a). when the hormone and alpha-amanitin are injected either simultaneously or if the toxin is administered first no inhibition of subsequent enzymatic activity is observed and in fact substantial enhancement occurs. cordycepin injection along with ecdysterone gives results similar to alpha-am ...19761084837
lipid content of maturing ovaries of aedes aegypti mosquitoes. 19751116351
comparison of lipid composition of aedes aegypti and aedes albopictus cells obtained from logarithmic and stationary phases of growth.the total lipids, total neutral lipids, and total phospholipids from aedes aegypti and aedes albopictus cells cultivated in vitro in a medium containing fetal calf serum were analyzed. the mosquito cells were harvested in the logarithmic and stationary phases of growth. the fatty acid profiles of the lipids showed differences during the aging of the cells but not betweeen species. there was an increase in chain elongation and unsaturation of the fatty acids in the stationary phase when compared ...19751117810
permanent loss of male fecundity following sperm depletion in aedes aegypti (l.). 19751123830
the effect of fluctuating temperature and humidity on the adult life table characteristics of five strains of aedes aegypti. 19751123832
lipase activity and stimulation mechanism of esterases in the midgut of female aedes aegypti. 19751133492
renewable fecundity of male aedes aegypti following replenishment of seminal vesicles and accessory glands. 19751141702
fine structure of scolopidia in johnston's organ of female aedes aegypti compared with that of the male. 19881141704
morphometric differences in midgut epithelial cells between strains of female aedes aegypti (l.) (insecta, diptera).midgut epithelial cells of female aedes aegypti deriving from 2 different mosquito strains were compared morphometrically. one of the 2 strains was recently isolated from nature (east africa). the other strain is an old laboratory strain, reared under laboratory conditions for about 30 years. the quantitative morphological comparison demonstrates, that the ultrastructural composition of the midqut epithelial cells corresponds generally in both strains. it can be shown, however, that in the old s ...19751149093
brugia pahangi: effects upon the flight capability of aedes aegypti. 19751149863
neutralization of sindbis virus by antisera to antigens of vector mosquitoes.sindbis virus harvested from infected cultures of vero cells and from aedes aegypti mosquitoes was used in neutralization tests with sera obtained from guinea pigs immunized with ground a. aegypti and from guinea pigs repetitively bitten by mosquitoes. employing these antisera, more mosquito-propagated virus was neutralized than was virus grown in cultures of vero cells. the neutralizing activity resided in the immune globulin fraction and may reflect the production of antibody to vector antigen ...19751155692
bioassay of mosquito iridescent virus of aedes taeniorhynchus in cell cultures of aedes aegypti. 19751159310
melanotic encapsulation of the nematode neoaplectana carpocapsae by aedes aegypti larvae concurrently parasitized by the nematode reesimermis nielseni. 19751159314
uptake and metabolism of the chemosterilants hempa and thiohempa by larvae, pupae and adults of aedes aegypti (l.) (diptera: culicidae). 19751167184
the multiplication of nodamura virus in insect and mammalian cell cultures.nodamura virus multiplied in mosquito cell lines, as determined by infectivivity assays in adult honey bees (apis mellifera) and wax moth larvae (galleria mellonella). titres of more than 10-7 and 10-5 bee ld50 /ml were obtained in culture fluids of aedes albopictus and aedes aegypti cells respectively after 10 days. comparable titres were obtained after several months, during which the cultures were subdivided up to six times. nodamura virus also multiplied in bhk cells and yielded titres of 10 ...19751168239
diminution and enlargement of the mosquito rhabdom in light and darkness.the rhabdoms of the larval ocelli of the mosquito aedes aegypti undergo morphological light and dark adaptation over periods of hours. the rhabdom enlarges during dark adaptation and grows smaller during light adaptation. diminution is exponential, enlargement linear, and rates of change are proportional to log light intensity. rhabdoms maintained at a constant intensity level off at a constant volume proportional to log intensity. we argue that changes in rhabdom volume after changes in light i ...01176940
excretion of proteolytic enzymes by aedes aegypti after a blood meal. 19751181369
trisomy in aedes aegypti.a trisomic (2n=6+1) pupa of the yellow fever mosquito aedes aegypti has been found. the trisomy involved chromosome 3 which is intermediate in size between 1 and 2. the extra chromosome formed a univalent or a trivalent during meiosis.19751182593
internal regulation of rate of digestion of blood meals in the mosquito, aedes aegypti. 19751185004
developmental effects of brugia pahangi (nematoda: filarioidea) to high temperature in susceptible genotypes of aedes aegypti (diptera: culicidae). 19751195293
comparison of phospholipid composition of aedes aegypti and aedes albopictus cells obtained from logarithmic and stationary phases of growth.aedes aegypti and aedes albopictus cells were grown in tissue culture and harvested at logarithmic and stationary phases of development. the phospholipids were extracted, separated into lipid classes, and fatty acid composition of each fraction determined. the phosphatidylethanolamine fraction was the major lipid (42-54%). with aging, the a. aegypti cells showed an increase in polyenes in the phosphatidylcholine and phosphatidylethanolamine fractions and in monoenes and polyenes in the phosphati ...20051196018
plant-insect interactions. i. biological and phytochemical evaluation of selected plants.extracts from more than 325 different plants have been tested for their effects on larvae of aedes aegypti, and from these initial tests, 16 plants were selected for further study. extracts from plant parts of these 16 plants were screened using tlc and the results are tabulated along with the observed biological activity.20061202312
arbovirus growth in aedes aegypti mosquitoes throughout their viable temperature range.after intrathoracic inoculation of laboratory-bred aedes aegypti mosquitoes with 3 yukon isolates of california encephalitis (ce) virus (showshoe hare subtype), northway (nor) and murray valley encephalitis (mve) viruses, viral replication was observed following incubation at 13, 21, 35 and 39 degrees c, which constituted the full temperature range of viability of a. aegypti. rates of viral replication were reduced at low temperatures and accelerated at high temperatures. virus-specific immunope ...19751202569
effect of the environmental conditions on eggs and water living stages of aedes aegypti (linn.) and aedes albopictus (skuse), vectors of dengue haemorrhagic fever in viet-nam. 19751203600
linkage of a gene for ddt-resistance in adults of the mosquito aedes aegypti.the gene rddt2, which gives resistance to ddt in the imago of aedes aegypti l. has been mapped on linkage group iii with respect to six visible markers. the best interpretation of the order of the genes is:- blp - blt - co - fz - wi -rddt2 - min, but the order blp - blt - co - fz -rddt2 - wi - min is also possible.19751203761
linkage of the genes for ddt and dieldrin resistance in larvae of the mosquito aedes aegypti.the ddt resistance gene rddt1, and the dieldrin resistance gene rd1 have been mapped on linkage group ii with respect to visible markers, in the mosquito aedes argypti l. the best interpretation of the data gives the order wa - rdl - ds rddt1 - s - y but was - rdl -ds - y - s - rddt1 is also possible. h is very loosely linked with rddt1. the length of the linkage group has been considerably extended from previous studies.19751203767
suppression of pupal esterase activity in aedes aegypti (diptera: culicidae) by an insect growth regulator.changes in non-specific esterases of aedes aegypti were noted during pupal development. one esterase band was found to increase markedly within 3 h of pupation and this increase in activity was suppressed by prior treatment of larvae with an insect growth regulator, zr 515. it is suggested that the esterase activity may help to reduce endogenous levels of juvenile hormone during metamorphosis and that the growth regulator may prevent this normal regulation.19751204757
results of spraying with ultra-low-volume malathion at ground level in panama city.several ultra-low-volume (ulv) sprayings of technical malathion (95 per cent) were carried out in panama city. their purpose was to find out how useful this ulv technique could be in helping to combat mosquitoes, especially aedes aegypti. two residential areas were selected as sites for the trials. one of these was san francisco, a district near the shoreline of the bay of panama with many individual houses and a few tall buildings. the other was el cangrejo, a district further inland containing ...19751212538
observations on the re-establishment of aedes aegypti population in poona city and suburbs, maharashtra state, india. 19751213808
[a histological study of pathological changes in aedes aegypti l. larvae experimentally infected with mosquito densonucleosis virus]. 20051214642
[a rapid method for the diagnosis of densonucleosis in aedes aegypti larvae and its use in search for insects susceptible to this virus]. 20091219360
[pathogenicity of aedes aegypti l. mosquito densonucleosis virus to larvae of other species of blood-sucking mosquitoes].laboratory studies established that a. aegypti mosquito virus of densonucleosis was infectious for larvae of a. caspius dorsalis, a. vexans, a. cinereus and c. pipiens pipiens caught in natural water bodies. death rates of aedes and culex larvae experimentally were 46.3% on the average, while in control groups 19.7%. the external appearance of virus-infected larvae and pathological changes in nuclei of the cells of the fat body were identical to those previously described in a. aegypti larvae af ...20161220247
variation in filarial susceptibility among east african populations of aedes aegypti. 19751223294
structure-activity relationships of phosphorus amides in aedes aegypti and culex pipiens fatigans (diptera: culicidae). 19751223296
buoyancy and ventilation in aedes aegypti (l.) pupae (diptera: culicidae). 19751223305
distribution of aedes aegypti (linnaeus) and aedes albopictus (skuse) in small towns and villages of penang island, malaysia--an ovitrap survey.an ovitrap survey was carried out in april and may of 1975 at twenty-one locations scattered throughout penang island excluding the city of georgetown. the results showed the ubiquitous presence of ae. albopictus. ae. aegypti was recorded only in tanjung tokong lama, an area adjacent to the city of georgetown. in the survey, ae. albopictus females were found to prefer the outdoor ovitraps than indoor ones. the effectiveness of ovitrap in aedes survey was discussed.19751226538
pathology of mosquito iridescent virus of aedes taeniorhynchus in cell cultures of aedes aegypti. 19761245745
letter: aedes aegypti complex in africa. 19761250361
neutral lipids of aedes aegypti and aedes albopictus cells cultured in vitro. 19761254981
changes in volume of the rhabdom in the compound eye of aedes aegypti l.the volume of the rhabdom in compound eyes of mosquitoes decreases upon illumination. this decrease is probably mediated by a bleaching of the visual pigment, since blue light is most effective in producing the change and red light is least effective. the reduction in rhabdom volume appears to be a result of rhabdomal membrane loss to coated vesicles and multivesicular bodies. these organelles were seen most frequently in blue adapted eyes, markedly less frequently in red adapted eyes, and only ...19761255121
vector competence of mosquitoes as a marker to distinguish central american and mexican epizootic from enzootic strains of venezuelan encephalitis virus.two epizootic strains of venezuelan encephalitis (ve) virus from central america and mexico were transmitted by a colonized epizootic vector mosquito, aedes taeniorhynchus, at higher rates than were two enzootic strains when the mosquitoes were infected by intrathroacic inoculation or feeding of virus. differences in transmission rates also occurred with colonized aedes aegypti, but were less marked. following intrathoracic inoculation of a. taeniorhynchus or a. aegypti, epizootic strains grew t ...19761259093
studies with brugia pahangi 12. the activity of levamisole.the effects of levamisole on adults, third stage infective larvae, and microfilariae of brugia pahangi were studied in in vitro culture and in vivo against developing stages in the vector mosquito and in infected cats. in vitro the drug was effective only at dose levels much higher than can be tolerated by mammals. it was active against the developmental stages of the worm in the vector aedes aegypti. the drug was strongly microfilaricidal in cats but less effective against adult worms.19761262689
[effect of the densonucleosis virus of the mosquito aedes aegypti l. on vertebrate animals]. 19761264036
palp-antenna, a homeotic mutant in aedes aegypti.palp-antenna is a homeotic mutant of aedes aegypti that modifies the apex of the maxillary palps of both sexes into a variable number of antenna-like segments. the fine structure of the antenna, including sexual dimorphism, is apparent in the mutant palps. palp-antenna is a sex-linked recessive. a linkage distance of 27.9 +/- 0.45 crossover units from sex is estimated from f2 and backcross data. penetrance is complete; expressively is variable. the fitness of the mutant compares favorably with t ...20101270791
bacterial pathogens isolated from guppies (poecilia reticulata) used to control aedes aegypti in trinidad. 20041287947
the diel pattern of entry to outdoor oviposition sites by female aedes aegypti (l.) (diptera: culicidae) that then laid eggs there: a preliminary study.experimental observations, made outdoors during the dry and wet seasons in trinidad, demonstrate that more than 70% of female aedes aegypti that are destined to oviposit within the next two hours enter ovitraps during the first and last two-hour periods in the day, a finding consistent with the diel pattern of oviposition recorded earlier at the same site. it is possible that proportionately more eggs are laid in the morning peak during the dry season than the wet season. fewer eggs are laid wit ...19921288434
[the campaign against aedes aegypti]. 19921296682
importance of ecology in aedes aegypti control.aedes aegypti is one of the world's most widely distributed mosquitos and is of considerable medical importance as a vector of dengue and yellow fever. not surprisingly therefore there has been more written on its biology than any other mosquito. the present paper summarizes ecological studies undertaken on this vector, including those on pre-adult mortalities, life-tables, adult dispersal and survival rates. in discussing surveillance techniques it is pointed out there are still no reliable met ...19921298074
[observation on the effectiveness of repellent coating against mosquitoes].the present paper reports on the effectiveness of a repellent coating for the first time. the repellent coating was made by combining deta (n,n-diethyl-meta-toluamide) with slow-releasing reagent. with this coating employed in the laboratory against aedes aegypti, the rate of blood-sucking was 3.9-9.5% and the rate of protection was 88.9-95.3% for 1-720 days. during 1-77 days' field trial, the rpi (relative population index) was 0-8.98% in the day-time and 0.74-17.15 during the night-time agains ...19921307278
influence of short time exposure to an insect growth regulator, hexaflumuron, on mortality and adult emergence of vector mosquitoes.hexaflumuron, an insect growth regulator (igr), was found to greatly affect the development of immatures and emergence of adults of three species of vector mosquitoes, culex quinquefasciatus, aedes aegypti and anopheles stephensi, when larvae were subjected to short time exposure of < or = 1 h. this igr could completely prevent adult emergence even at a minimum exposure time of 10 min at 0.001, 0.01 and 0.1 mg/l. on treatment, larval and pupal mortality as well as varying degrees of morphogeneti ...20071308571
susceptibility of selected strains of aedes aegypti and aedes albopictus (diptera: culicidae) to chikungunya virus.the relative susceptibility of selected strains of aedes aegypti (l.) and aedes albopictus (skuse) fed on a viremic monkey to infection with chikungunya virus was determined. infection rates were consistently higher in 10 strains of ae. albopictus tested than in 7 strains of ae. aegypti tested, regardless of the geographic location from which the strains originated or the dose of virus ingested. similarly, virus dissemination rates were higher in the ae. albopictus strains compared with the ae. ...19921313111
generation of superoxide anion radical by alpha-terthienyl in the anal gills of mosquito larvae aedes aegypti: a new aspect in alpha-terthienyl phototoxicity.the present study documents that the secondary plant metabolites, especially alpha-terthienyl, exert phototoxic action through inhibition of certain enzymes and generation of singlet oxygen. some of the reports have emerged exhibiting involvement of free radical generation in vitro by alpha-terthienyl. we provide evidence for the generation of a free radical viz., superoxide anion radical, by alpha-terthienyl employing spin-trapping techniques, probably due to the extension of the latter reactio ...19921318115
the complete nucleotide sequence of cell fusing agent (cfa): homology between the nonstructural proteins encoded by cfa and the nonstructural proteins encoded by arthropod-borne flaviviruses.cell fusing agent (cfa) is an rna virus originally isolated from a line of aedes aegypti mosquito cells. although our characterization of the virus many years ago showed that it resembled the flaviviruses, there was no detectable serological cross-reaction with members of the genus flavivirus. furthermore, unlike the well-studied members of the genus flavivirus, cfa did not replicate in any of several vertebrate cell lines tested. we have now determined the nucleotide sequence of the cfa genome. ...19921322586
enzymes in saliva from four parasitic arthropods.enzyme assays and sds polyacrylamide gel electrophoresis were carried out on saliva and in some cases homogenates of salivary gland and gut from four parasitic arthropods (the cattle tick, boophilus microplus (canestrini); the mosquito, aedes aegypti (l.); non-parasitic adult and parasitic larval blowfly of sheep, lucilia cuprina (wiedemann); the buffalo fly, haematobia irritans exigua de meijere). saliva from all species showed large differences in the number and molecular weight of components, ...19921330086
[the action of phytobacteriomycin on the ultrastructure of the epithelial cells in the midgut of the mosquito aedes aegypti l]. 20091331734
isolation of getah virus from mosquitos collected on hainan island, china, and results of a serosurvey.an isolate of getah virus was obtained from culex mosquitos collected in mao'an village, baoting county, hainan province, china, in 1964. the virus (strain m-1) replicated in laboratory-bred aedes aegypti and cx. fatigans (= quinquefasciatus), and was transmitted by laboratory-bred ae. albopictus to healthy newborn albino mice. skeletal muscles of newborn albino mice experimentally infected with the virus showed degeneration, atrophy, necrosis, and inflammatory changes of muscle fibers. antibody ...19921338481
a new serotype of bacillus thuringiensis from colombia toxic to mosquito larvae.during a survey conducted in colombia a new isolate of bacillus thuringiensis that showed toxicity toward culex quinquefasciatus, cx. pipiens, aedes aegypti, and anopheles stephensi larvae was isolated. parasporal crystals were spherical in shape and showed a great degree of similarity with those produced by the reference strain of bacillus thuringiensis subsp. israelensis. supernatant fraction of the whole culture was not toxic, and heat-stable exotoxin production was negative. catalase, urease ...19921347310
laboratory colonization and maintenance of toxorhynchites moctezuma.a colony of toxorhynchites moctezuma was established at the caribbean epidemiology centre in trinidad in 1984. toxorhynchites moctezuma was maintained in cages with high humidities. eggs were deposited most frequently in a cut bicycle tire containing water. a minimum of 42 h was required for hatching, but 94% hatched between 43 and 51 h. aedes aegypti larvae were supplied as prey. larval development times varied with the quantity of prey offered, but when fed ad lib, peak developmental time was ...19921349915
[the efficacy of a combined preparation based on bacillus sphaericus and bac. thuringiensis h-14 against the larvae of blood-sucking mosquitoes].the optimal bactoculicide/sphaerolarvicide ratio in combination using against aedes aegypti larvae was established in laboratory by selection. the field trials of the selected bs/bt sample containing the ingredients in titer: bactoculicide-83, sphaerolarvicide-17 were conducted in the arid area of central asia. with 1 g/m2, complete mortality of culex, aedes and anopheles larvae was obtained with the residual larvicidal action of 15 days. it is recommended to carry out more large-scale trials of ...19921354836
identification of the abdominal-a homologue from aedes aegypti and structural comparisons among related genes. 01354853
comparison of bacillus thuringiensis subsp. israelensis cryiva and cryivb cloned toxins reveals synergism in vivo.when the gene for the mosquitocidal protein cryiva was expressed in two strains of bacillus thuringiensis (bt) cured of their resident delta-endotoxin genes, the protein accumulated as large inclusions. the inclusions produced in the bt subsp. kurstaki recipient strain were twice as soluble at alkaline ph as the inclusions produced in bt subsp. israelensis. solubilized protoxins were activated by treatment with mosquito gut extracts or trypsin for varying lengths of time and tested for in vitro ...19921355748
adulticidal effect of cyfluthrin against mosquitos of public health importance in malaysia.the efficacy of two formulations, wettable powder and emulsifiable concentrate, of cyfluthrin sprayed on plywood [10 mg (ai)/m2] was assessed against six species of mosquitos. the bioassay followed the who standard method, with some modification for the bioassay of insecticidal deposits on wall surfaces. the results indicated that these two formulations of cyfluthrin were effective against anopheles dirus and mansonia uniformis, moderately toxic to aedes aegypti and ae. albopictus in decreasing ...19921355928
infectivity and pathogenesis of iridescent virus type 22 in various insect hosts.this paper reports the results of a series of laboratory experiments to determine the infectivity and pathogenesis of iridescent virus type 22 (iv 22) for six species of mosquitoes, phlebotomine sand flies and triatomid bugs. following inoculation, iv 22 replicated in all of the species tested, without producing noticeable mortality within a 14 day observation period. examination of the infected insects by immunofluorescence demonstrated large amounts of viral antigen in many different organs. e ...19921355961
host range of clostridium bifermentans serovar. malaysia, a mosquitocidal anaerobic bacterium.clostridium bifermentans serovar. malaysia (c.b.m.) is toxic to mosquito larvae. in this study, we quantified its toxicity to the mosquitoes, aedes aegypti, ae. albopictus, ae. caspius, ae. detritus, anopheles stephensi, an. gambiae, culex pipiens and cx. quinquefasciatus. anopheles larvae are the most susceptible, followed by ae. detritus and ae. caspius, then culex and other aedes larvae. according to mosquito species, the lc50 varies from 7 x 10(3) to 1.3 x 10(6) cells/ml. three concentration ...19921357087
diel sugar-feeding and host-seeking rhythms in mosquitoes (diptera: culicidae) under laboratory conditions.mosquito sugar-feeding and host-seeking rhythms were recorded in the laboratory using remote sensors. in all five species studied, the two rhythms were nearly synchronous. in anopheles quadrimaculatus say, culex quinquefasciatus say, and aedes triseriatus (say), host-seeking activity increased slightly earlier than sugar feeding in the evening. the evening sugar-feeding period was longer than the evening host-seeking period in aedes aegypti (l.), but the two periods were of similar duration in a ...19921357175
virus-dependent mortality in rift valley fever, eastern equine encephalomyelitis, and chikungunya virus-inoculated mosquito (diptera: culicidae) larvae.the effect of inoculation of mosquito larvae with rift valley fever (rvf) virus on survival to the adult stage was evaluated in aedes aegypti (l.), ae. fowleri (charmoy), ae. mcintoshi huang, ae. taeniorhynchus (wiedemann), ae. triseriatus (say), eretmapodites quinquevittatus theobald, anopheles albimanus wiedemann, and culex pipiens l. pupation rates were similar for rvf virus-inoculated and diluent-inoculated larvae of all mosquito species tested except cx. pipiens. however, with the exception ...19921357176
effects of toxorhynchites moctezuma larval predation on aedes aegypti populations: experimental evaluation.predatory larvae of the mosquito toxorhynchites moctezuma were used experimentally to control a standing crop of larvae of the dengue vector mosquito ae.aegypti. each week, fifty ae.aegypti first instar larvae were introduced to each of five water-filled drums (220 litres) of the type commonly used for domestic water storage in caribbean dwellings. at the beginning of the fourth week, a certain number (0, 1, 2, 5 or 10) of first instar tx.moctezuma larvae were introduced to each drum and the dai ...19921358268
suppression of aedes aegypti by predatory toxorhynchites moctezuma in an island habitat.larval populations of the mosquito aedes aegypti were suppressed by predatory toxorhynchites moctezuma mosquito larvae released systematically in a village on union island (saint vincent and the grenadines) during march-december 1988. eggs and larvae of tx.moctezuma were transported from trinidad and introduced into all semi-permanent and permanent water-holding containers in the experimental village at clifton. the semi-isolated village of ashton served as control. base-line ae.aegypti indices ...19921358269
beta-cyfluthrin, a synthetic pyrethroid for mosquito control.beta-cyfluthrin (oms 3051), a new synthetic pyrethroid and one of the stereoisomers of cyfluthrin, was studied for insecticidal activity against eight mosquito species. its larvicidal activity with lc50 values of 5.62 x 10(-5) and 1.19 x 10(-4) mg/l respectively for culex quinquefasciatus and aedes aegypti was comparable with that of deltamethrin. this pyrethroid was more effective against the larvae of armigeres subalbatus (lc50 - 7.76 x 10(-7)) and the adults of anopheles culicifacies lt50 - 2 ...19921359650
reduced mosquito production in cemetery vases with copper liners.water-holding stone vases were sampled in 4 central florida cemeteries to compare the prevalence of mosquitoes in containers with and without metallic liners. overall, immature mosquitoes were found in more than 60% of the vases lacking liners and in more than 50% of the vases with aluminum liners. significantly fewer vases with copper liners were positive for mosquitoes. high mortality and a lack of development were observed in a field test involving the introduction of aedes aegypti larvae int ...19921361942
cannibalism and carnivory in toxorhynchites splendens (diptera: culicidae).laboratory reared larvae of toxorhynchites splendens, which were previously starved for 24 hours, cannibalized eggs of their own kind or preyed upon the eggs of other species (aedes aegypti and anopheles stephensi) present on the surface of water in small containers. second and third instars consumed eggs faster than first and fourth instars. the first instar consumed larvae of its own kind faster than the other instars, in the absence of other prey. however, when prey larvae were provided, ther ...19921362626
evaluation of the residual efficacy of permethrin-impregnated screens used against mosquitoes in marigat, baringo district, kenya.insecticide-impregnated screens and bednets are gradually finding wider use in malaria control programmes. the efficacy of these devices is dependent on the method of application, the acceptability by the people and effectiveness of the insecticide used. the present studies were carried out to determine the duration of the effectiveness of a permethrin-impregnated wall cloth (mbu cloth) used in the marigat area of baringo district, kenya in order to ensure its effective use. cotton cloth impregn ...19921363445
[susceptibility of thirty-one species of mosquitoes to romanomermis yunanensis].a new species of mermithidae was found parasitizing the larvae of culex tritaeniorhynchus and culex fatigans in henan, china and then named romanomermis yunanensis. thirty-one species of mosquitoes involving six genera have been tested for susceptibility to r. yunanensis and culicinae mosquito have consistently been highly susceptible. at a 1:5 ratio of mosquito larvae to nematode juveniles, the parasitisms of aedes aegypti, ae. albopictus, culex fatigans, culex tritaeniorhynchus, anopheles sine ...19921363920
sequence and secondary structure comparisons of its rdna in mosquitoes (diptera: culicidae).sequences of the internal transcribed spacers (its1 and its2) of the mosquito aedes aegypti, and the its2 of six related species, a. simpsoni, a. albopictus, a. vexans, a. triseriatus, haemagogus mesodentatus, and psorophora ferox are reported. intraspecific variation in a. aegypti its1 is 1.07% among four clones from three individuals, and in the its2 is 1.17% among 15 clones from four individuals. in a. simpsoni, intraspecific its2 variation is 0.46% among 10 clones from a single individual. a ...19921364170
expression and secretion of a functional scorpion insecticidal toxin in cultured mouse cells.we have expressed a synthetic gene encoding the insecticidal neurotoxin of scorpion androctonus australis (aait) in nih/3t3 mouse fibroblast cells under the transcriptional control of a murine retroviral long terminal repeat. the secretion of the toxin into the culture medium was directed by the signal peptide of human interleukin-2. the recombinant aait produced was selectively toxic to yellow-fever mosquito larvae and harmless to mice.19901366462
characterization of a vasodilator from the salivary glands of the yellow fever mosquito aedes aegypti.salivary gland homogenates and oil-induced saliva of the mosquito aedes aegypti dilate the rabbit aortic ring and contract the guinea pig ileum. the vasodilatory activity is endothelium-dependent, heat-stable, sensitive to both trypsin and chymotrypsin treatments, and both smooth muscle activities cross-desensitize to the tachykinin peptide substance p. both bioactivities co-elute when salivary gland homogenates are fractionated by reversed-phase hplc. molecular sieving chromatography indicates ...19921375258
[effect of sublethal concentrations of abate on biological parameters of aedes aegypti].the effect of abate (temephos) applied at the rate of 0.016, 0.020 and 0.025 mg/l on fourth stadium larvae and its effect upon pupae weight, adult weight, ingested blood weight and longevity of aedes aegypti were investigated. the insecticide was applied on f2 generation larvae that were fed an artificial diet under laboratory conditions, from larvae collected at urban level in monterrey, n.l., mexico. in relation to the adult, females were fed with a 10 per cent honey solution and rabbit blood ...19921380186
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