Publications
| Title | Abstract | Year Filter | PMID(sorted descending) Filter |
|---|
| identification of three allatostatins and their cdna from the mosquito aedes aegypti. | three allatostatins have been isolated from the mosquito aedes aegypti. these peptides have the following structures: ser-pro-lys-tyr-asn-phc-gly-leu-amide, leu-pro-his-tyr-asn-phe-gly-leu-amide, and arg-val-tyr-asp-phe-gly-leu-amide. a cdna encoding these peptides was isolated from an abdominal ganglia cdna library and sequenced. it was found to encode two additional allatostatins: ala-ser-ala-tyr-arg-tyr-his-phe-gly-leu-amide and leu-pro-asn-arg-tyr-asn-phe-gly-leu-amide. northern analysis of ... | 1997 | 9357049 |
| mosquito transferrin, an acute-phase protein that is up-regulated upon infection. | when treated with heat-killed bacterial cells, mosquito cells in culture respond by up-regulating several proteins. among these is a 66-kda protein (p66) that is secreted from cells derived from both aedes aegypti and aedes albopictus. p66 was degraded by proteolysis and gave a virtually identical pattern of peptide products for each mosquito species. the sequence of one peptide (31 amino acids) was determined and found to have similarity to insect transferrins. by using conserved regions of ins ... | 0 | 9356450 |
| selected lines of aedes aegypti with persistently distorted sex ratios. | a breeding scheme to isolate x chromosomes sensitive to drive by the t8 (trinidad) y chromosome of aedes aegypti (the md haplotype) is reported. crosses with an australian strain th.i (thursday island) revealed not only sensitive and resistant x chromosomes but also some with the capacity to drive against the t8 y chromosome. four strains were created in which sex ratio was male-distorted (28-36 per cent female) for 10 generations, with no regression towards sexual parity. the proportion of fema ... | 1997 | 9353868 |
| impact of dengue virus infection and its control. | dengue virus infection has been counted among emerging and re-emerging diseases because of (1) the increasing number of patients, (2) the expansion of epidemic areas, and (3) the appearance of severe clinical manifestation of dengue hemorrhagic fever (dhf)/dengue shock syndrome (dss), which is often fatal if not properly treated. in the meantime, there are no effective dengue control measures: a dengue vaccine is still under development and vector control does not provide a long-lasting effect. ... | 1997 | 9348165 |
| [reflection on 2 current viral diseases: yellow fever and dengue]. | yellow fever and dengue are two current viral diseases induced by flaviviruses and usually transmitted by the same mosquito vector, aedes aegypti. from 1987 to 1991, 18,753 cases of yellow fever, mainly from africa, have been notified to who, leading to 4,522 deaths. on the other hand, who estimates that 2.5 billions individuals living in tropical areas are at risk to contract dengue fevers. in fact, 500,000 patients are hospitalized each year for dengue hemorrhagic fever/dengue shock syndrome a ... | 1997 | 9347008 |
| cloning, expression and toxicity of a mosquitocidal toxin gene of bacillus thuringiensis subsp. medellin. | bacillus thuringiensis (bt) subsp. medellin (btmed) produces parasporal crystalline inclusions which are toxic to mosquito larvae. it has been shown that the inclusions of this bacterium contain mainly proteins of 94, 68 and 28-30 kda. ecori partially digested total dna of btmed was cloned by using the lambda zap ii cloning kit. recombinant plaques were screened with a mouse polyclonal antibody raised against the 94 kda crystal protein of btmed. one of the positive plaques was selected, and by i ... | 1997 | 9332588 |
| structure of the gypsy moth vitellogenin gene. | genomic clones containing the vitellogenin (vg) gene from the gypsy moth were isolated from two genomic libraries and characterized. the nucleotide sequence of a 16,132 bp region of the gypsy moth genome was determined which included a 3,666 bp region upstream from the transcription initiation site and 499 bp region downstream from the transcribed region. primer extension analysis was performed to identify the transcription initiation site. gene sequence confirmed the sequence of vgmrna recently ... | 1997 | 9327584 |
| midgut-specific immune molecules are produced by the blood-sucking insect stomoxys calcitrans. | we have cloned and sequenced two defensins, smd1 and smd2, from anterior midgut tissue of the blood-sucking fly stomoxys calcitrans. the dna and n-terminal protein sequences suggest both are produced as prepropeptides. smd1 differs from the classic defensin pattern in having an unusual six-amino acid-long n-terminal sequence. both smd1 and smd2 have lower pi points and charge than insect defensins derived from fat body/hemocytes. northern analysis shows both of these defensin molecules are tissu ... | 1997 | 9326639 |
| immune responsiveness in vector insects. | 1997 | 9326575 | |
| dengue infection in paracambi, state of rio de janeiro, 1990-1995. | a seroepidemiological survey was carried out during 1994 in the municipality of paracambi, state of rio de janeiro. haemagglutination inhibition test positivity was detected in 145 out of 370 (39.2%) schoolchildren. the frequency of positive test by sex was 53.8% (78/145) female and 46.2% (67/145) male. distribution by age showed the increasing of antibody positivity in older children. strains of dengue virus type 1 and dengue virus type 2 were isolated before (1990) showing the co-circulation o ... | 1997 | 9322424 |
| (2,4-cis and trans)-gigantecinone and 4-deoxygigantecin, bioactive nonadjacent bis-tetrahydrofuran annonaceous acetogenins, from goniothalamus giganteus. | two new acetogenins, (2,4-cis and trans)-gigantecinone (1), isolated as a mixture, and 4-deoxygigantecin (2), a known acetogenin whose absolute stereochemistry has not been determined previously, were isolated using activity-directed fractionation, from the bark of goniothalamus giganteus. a key step in solving their absolute stereochemistries was the preparation of 1,4-diol formaldehyde acetal derivatives (1b and 2a). using the advanced mosher ester method and circular dichroism, the absolute s ... | 1997 | 9322367 |
| does transovarial transmission of dengue virus occur in malaysian aedes aegypti and aedes albopictus? | 1997 | 9322311 | |
| detection of dengue virus from field aedes aegypti and aedes albopictus adults and larvae. | mosquito adults and larvae were collected from dengue high risk areas and transported to the laboratory for identification. identified mosquitos were pooled according to the species, date and locality and stored at -70 degrees c. a total of 1,385 pools of aedes albopictus and 267 pools of ae. aegypti were collected from major towns in 12 states in peninsular malaysia. virus isolation was carried out using cell culture (c6/36 clone) of ae. albopictus and detection of dengue virus by the peroxidas ... | 1997 | 9322296 |
| activity of dengue-2 virus and prevalence of aedes aegypti in the chirimiri colliery area, madhya pradesh, india. | repeated outbreaks of a suspected viral fever in chirimiri colliery area, madhya pradesh were reported since 1990. the area consists of an agglomeration of sprawling settlements at varying altitudes of 816 to 890 m and it has partial sylvan cover. during a 1992 outbreak 25 patients' sera were tested, of which 13 showed seropositivity to dengue (den) by mac-elisa test; den-2 was isolated from aedes aegypti collected from two of the eight settlements of the area. the principal vector, ae. aegypti, ... | 1997 | 9322295 |
| leucokinin increases paracellular permeability in insect malpighian tubules | there are two major transport pathways across epithelia: a transcellular pathway through cells and a paracellular pathway between cells. previous electrophysiological studies in mosquito malpighian tubules suggested that the neuropeptide leucokinin-viii (lk-viii) increases the chloride permeability of the paracellular pathway. to test the effect of lk-viii on the paracellular pathway further, we measured transepithelial permeabilities of inulin and sucrose in isolated malpighian tubules from the ... | 1996 | 9320463 |
| central projections of the maxillary and antennal nerves in the mosquito aedes aegypti | in the mosquito aedes aegypti, co2-sensitive receptor neurones are located together with two other types of chemoreceptor neurones in club-shaped sensilla basiconica on the most distal segment of the maxillary palps. in order to identify the central target neuropiles of these neurones and to determine whether antennal receptor neurones project into the same area, the palpal and antennal nerves were labelled by anterograde staining with horseradish peroxidase and by experimentally induced degener ... | 1997 | 9319784 |
| factors influencing the duration of blood-feeding by laboratory-reared and wild aedes aegypti (diptera: culicidae) from trinidad, west indies. | the time taken by aedes aegypti to take a bloodmeal was determined under laboratory and field conditions in trinidad. eggs from field-collected females were reared under nutrient-limited (low diet) and nutrient-adequate (high diet) conditions. blood-feeding times indicated that 71% of the females from the low-diet group were fast feeders (< 2 min) compared with 40% of the female from the high-diet group. subsequent tests of the f1 and f2 progeny of the fast-feeding females indicated that the fas ... | 1997 | 9307662 |
| a fitness advantage for aedes aegypti and the viruses it transmits when females feed only on human blood. | literature on arthropod-borne diseases has traditionally supported the notion that mosquito vectors maintain a feeding duality that includes vertebrate blood meals for egg development and sugar meals from plants for the synthesis of flight and survival energy reserves. aedes aegypti was found to deviate from that feeding pattern by obtaining a reproductive advantage when feeding only on human blood. female mosquitoes fed human blood alone had a greater net replacement rate and intrinsic rate of ... | 1997 | 9288822 |
| venereal and vertical transmission of the aedes albopictus parvovirus in aedes aegypti mosquitoes. | following per oral infection of aedes aegypti larvae with aedes albopictus parvovirus (aapv), infected males and females adults were tested for their ability to transmit the virus venereally and vertically, respectively. both types of transmission were observed. a low percentage (2.2%) of aapv-free females were found contaminated by the virus after mating with aapv-infected males. although no significant difference was observed in the fecundity of orally infected and virus-free females, 17.1% of ... | 1997 | 9288802 |
| impact of dengue virus infection on feeding behavior of aedes aegypti. | in addition to heavily infecting the salivary glands of aedes aegypti (l.) mosquitoes, dengue viruses produce a significant infection of the nervous system, involving the brain, johnston's organ, compound eye, and thoracic and abdominal ganglion. to determine if dengue infection affects feeding behavior of ae. aegypti we measured feeding times, counted the number of feeding delays or interruptions, and by in situ immunocytochemistry techniques determined the spatial and temporal distribution of ... | 1997 | 9288801 |
| characterization and biological activity of a brazilian isolate of bacillus sphaericus (neide) highly toxic to mosquito larvae. | primary powders of bacillus sphaericus strain s2 isolated from soil samples in brazil, and strain 2362 were produced in a 14 liter fermentor. growth patterns and sporulation observed in three trials with strains s2 and 2362 in the fermentor were similar. second-instar larvae of culex quinquefasciatus, anopheles albimanus, anopheles quadrimaculatus, and aedes aegypti exposed for 48 hr to strain s2 responded with lc50 values of 0.25, 5.95, 12.28 and 140.0 ppb of lyophilized primary powder, respect ... | 1996 | 9283664 |
| the white gene from the yellow fever mosquito, aedes aegypti. | we report the cloning and primary characterization of both cdna and genomic fragments from the white gene of the yellow fever mosquito, aedes aegypti. comparisons of the conceptual translation product with white genes from four other species within the order diptera show that the ae. aegypti gene is most similar to the white gene of the mosquito vector of human malaria, anopheles gambiae (86% identity and 92% similarity). the analysis of the primary sequence of genomic dna at the 5'-end of the c ... | 1997 | 9272447 |
| isolation and properties of drosophila melanogaster ferritin--molecular cloning of a cdna that encodes one subunit, and localization of the gene on the third chromosome. | ferritin was purified from iron-fed drosophila melanogaster extracts by centrifugation in a gradient of potassium bromide. on polyacrylamide gel electrophoresis, the product showed two protein bands corresponding to the ferritin monomer and dimer. electrophoresis following dissociation with sds and 2-mercaptoethanol revealed three strong bands of approximately 25, 26, and 28 kda. n-terminal amino acid sequences were identical for the 25-kda and 26-kda subunits, but different for the 28-kda subun ... | 1997 | 9266686 |
| [a description of aedes aegypti colonization in the region of são josé do rio preto, são paulo]. | the aim of this study is to describe the colonization by the aedes aegypti in the region. a survey carried out in 1985 detected the species in são josé do rio preto. the mosquito has spread and reached the 30 countries of the region till 1988. in the district and rural areas, the first vector focus was found out in 1987 in one of the 29 districts and rural areas, having spread to the others till 1991. the foci have been mainly identified through larval researches in locations with a great concen ... | 1997 | 9265223 |
| efficacy of altosid pellets and granules against aedes aegypti in ornamental bromeliads. | the tank bromeliad billbergia pyramidalis was treated with 2 doses (0.5 and 2 g) of altosid granules or pellets for the control of aedes aegypti l. emergence inhibition (ei) for all mosquito pupae (including natural populations) in the center wells and leaf axils was > 90% for at least 6 and 12 months for both doses of granules and pellets, respectively. no significant difference in %ei was found between center wells and leaf axils. | 1997 | 9249661 |
| effect of ebastine on mosquito bites. | mosquito bites usually cause wealing and delayed bite papules. cetirizine decreases wealing, bite papules and pruritus but the effect of other antihistamines on mosquito bites is unknown. we studied the effect of ebastine in 30 mosquito bite-sensitive adult subjects. ebastine 10 mg or 20 mg and placebo were given for 4 days in a cross-over fashion. aedes aegypti bites were given on forearms. the size of the bite lesions and pruritus (visual analogue score) were measured at 15 min, 2, 6, and 24 h ... | 1997 | 9228228 |
| transposable elements as sources of variation in animals and plants. | a tremendous wealth of data is accumulating on the variety and distribution of transposable elements (tes) in natural populations. there is little doubt that tes provide new genetic variation on a scale, and with a degree of sophistication, previously unimagined. there are many examples of mutations and other types of genetic variation associated with the activity of mobile elements. mutant phenotypes range from subtle changes in tissue specificity to dramatic alterations in the development and ... | 0 | 9223252 |
| reduced transfer of male accessory gland proteins and monandry in female aedes aegypti mosquitoes. | we examined whether female aedes aegypti (l.) mosquitoes would remate after they first mated with a male that was reared on a suboptimal larval diet and that as a result, transferred reduced amounts of male accessory gland proteins. accessory gland proteins from males labeled with 3h leucine were not detected in females allowed to male mate with the labeled males after they first mated with either low diet or high diet males. the amount of the male accessory gland protein transferred by smaller, ... | 1997 | 9221745 |
| infection and transmission of plasmodium gallinaceum (eucoccida: plasmodiidae) in aedes aegypti (diptera: culicidae): effect of preinfection sugar meals and postinfection blood meals. | frequency of sugar feeding and blood feeding can have an impact on the infection by and transmission of malaria parasites. data presented here indicate that frequent blood feeding has a deleterious effect on infection by malaria parasites in aedes aegypti. in addition, mosquitoes that do not blood feed, but instead feed on sugar alone after an infected blood meal, have a higher rate of parasite transmission than mosquitoes fed additional blood meals. | 1997 | 9221737 |
| mixed-species plasmodium infections of anopheles (diptera:culicidae) | mixed-pathogen infections of vectors rarely are considered in the epidemiological literature, although they may occur in nature. a review of published reports shows that many anopheles species are capable of carrying sporozoites of > 1 plasmodium species, of doing so simultaneously in field conditions, and of acquiring and transmitting these in experimental situations. mixed-species infections in mosquito populations occur at frequencies greater than or equal to the product of the constituent sp ... | 1997 | 9220675 |
| transposition of the hermes element in embryos of the vector mosquito, aedes aegypti. | using a plasmid-based transpositional recombination assay in vivo, we have demonstrated that hermes, a short inverted repeat type transposable element from musca domestica, can transpose in aedes aegypti embryos. hermes transpositions in ae. aegypti have all the characteristics observed during hermes transposition in its host m. domestica and in related species. these characteristics include an absolute dependence on the expression of the hermes transposase and a preference for the integration s ... | 1997 | 9219363 |
| molecular characterization of a defensin gene from the mosquito, aedes aegypti. | insect immune proteins, defensins, are inducible anti-gram-positive bacterial peptides. we report here the identification of two defensin genes from the mosquito, aedes aegypti, which encode a large 541 bp transcript (aadef ala) and a small 473 bp transcript (aadef asm). the cdna corresponding to aadef ala was cloned, sequenced, and compared with the previously reported aadef asm cdna. the aadef ala gene was isolated through genomic library screening and characterized. it putative regulatory reg ... | 1997 | 9219362 |
| characterization of bacillus thuringiensis isolated from infections in burn wounds. | four strains of bacillus thuringiensis were isolated from infections in burn wounds and from water used in the treatment of burn wounds. the strains produced large parasporal inclusion bodies composed of 141, 83, and 81 kda protoxins. the four strains were tested for insecticidal activity against larvae of pieris brassicae and aedes aegypti but showed no activity; vero cell assays for the production of enterotoxins were also negative. attempts to classify the strains according to flagellar h-ser ... | 1997 | 9215586 |
| experimental transmission of nocturnally periodic wuchereria bancrofti to indian leaf monkey (presbytis entellus). | successful experimental transmission of the human lymphatic dwelling nocturnal periodic strain of wuchereria bancrofti has been achieved from man to indian leaf monkey (presbytis entellus) through a susceptible strain of aedes aegypti. the prepatent period varied between 195 and 240 days. microfilaria (mf) levels were in general low and the peak count was attained at 1800 hr. of the adult worms 5-12.5% were recovered from male langur while females revealed poor (2.54%) recovery. this host--paras ... | 1997 | 9207745 |
| three novel families of miniature inverted-repeat transposable elements are associated with genes of the yellow fever mosquito, aedes aegypti. | three novel families of transposable elements, wukong, wujin, and wuneng, are described in the yellow fever mosquito, aedes aegypti. their copy numbers range from 2,100 to 3,000 per haploid genome. there are high degrees of sequence similarity within each family, and many structural but not sequence similarities between families. the common structural characteristics include small size, no coding potential, terminal inverted repeats, potential to form a stable secondary structure, a+t richness, ... | 1997 | 9207116 |
| the reemergence of aedes aegypti in arizona. | 0 | 9204311 | |
| failure of aedes aegypti to become infected by feeding on dengue virus-infected immuno-comprised nude mice. | 1997 | 9199718 | |
| zebedee: a novel copia-ty1 family of transposable elements in the genome of the medically important mosquito aedes aegypti. | we have utilised pcr to directly identify a novel family of copia-ty1 retrotransposable elements (rtps) in the genome of the mosquito aedes aegypti. two members of the family have been sequenced in their entirety and their structural characteristics determined. zebedeei is 3505 bp long and appears to be flanked by 21bp direct repeat sequences. a single open reading frame (orf) of 972 amino acids has the coding potential for a polyprotein with homology corresponding to the conserved amino acid mo ... | 1997 | 9197409 |
| insecticide impregnated cotton fabrics of different hydrophobicity against aedes aegypti (diptera:culicidae). | residual efficacy of synthetic pyrethroids, viz, permethrin, deltamethrin, lambdacyhalothrin and an insect repellent depa in cotton fabrics of different hydrophobicity was tested against aedes aegypti. amino silicone was used for enhancing the hydrophobicity of the fabrics. the results showed that there was an increasing trend in repellency/feeding deterrency with the increase in hydrophobicity up to 17.5 weeks at an optimum level of 30g/l. the adulticidal effect lasted for 1 to 4 weeks and this ... | 1996 | 9185280 |
| analysis of molecular forms and pharmacological properties of acetylcholinesterase in several mosquito species. | two acetylcholinesterases (ache1 and ache2) have recently been characterized in the common mosquito culex pipiens. this situation appeared to be an exception among insects, where only one acetylcholinesterase gene had previously been repeatedly reported. in the present study, acetylcholinesterase was studied in five mosquito species: aedes aegypti, anopheles gambiae, anopheles stephensi, culiseta longeareolata and culex hortensis, in order to test whether or not two different acetylcholinesteras ... | 1997 | 9185166 |
| comparisons of genetic variability and genome structure among mosquito strains selected for refractoriness to a malaria parasite. | restriction fragment length polymorphism (rflp) markers were used to evaluate aedes aegypti genome structure and genetic variability within and between substrains selected for different levels of refractoriness to the malaria parasite, plasmodium gallinaceum. the moyo-r substrain was previously selected for complete refractoriness and the moyo-is substrain for intermediate susceptibility from the moyo-in-dry (moyo) strain by selective inbreeding (f = 0.5). eighteen mapped rflp markers were used ... | 1997 | 9183846 |
| investigation of mosquito-specific larvicidal activity of a soil isolate of bacillus thuringiensis serovar canadensis. | the lc50 value of alkali-solubilized parasporal inclusion proteins of a diptera-specific strain, belonging to bacillus thuringiensis serovar canadensis, was 2.4 microg/ml for larvae of the mosquito, aedes aegypti. a significant loss in larvicidal activity occurred when solubilized inclusion proteins were treated with a. aegypti larval gut extract, silkworm (bombyx mori) larval gut juice, and the proteinase k. approximately 90% of the larvicidal activity was destroyed upon treatment with protease ... | 1997 | 9175558 |
| inheritance of larval resistance to permethrin in aedes aegypti and association with sex ratio distortion and life history variation. | the genetic mechanisms that confer larval permethrin resistance were investigated in two strains of aedes aegypti, vectors of yellow fever and dengue hemorrhagic fever. larval resistance to permethrin in an ae. aegypti field-collected resistant couva (r) strain was associated with the sex-determining locus by analysis of backcrosses to the susceptible rockefeller (s) strain. the median lethal concentrations (lc50s) of these strains were 23.1 (95% confidence interval = 22.0-24.3) and 2.2 (2.0-2.3 ... | 1997 | 9158058 |
| efficacy of carbon dioxide, 1-octen-3-ol, and lactic acid in modified fay-prince traps as compared to man-landing catch of aedes aegypti. | the attractants 1-octen-3-ol and lactic acid significantly decreased catches of aedes aegypti in townsville, australia, by 50% in a controlled laboratory environment and by 100% in the field when compared to carbon dioxide baited bidirectional fay-prince trap catches. evaluation of an omnidirectional alteration on a bidirectional fay-prince trap revealed no significant improvement in catch size when compared to both the bidirectional trap and man-landing catch (mlc). cumulative evening mlc (1730 ... | 1997 | 9152877 |
| effects of two insect growth regulators on the susceptibility of aedes aegypti (diptera:culicidae) to molinema dessetae (nematoda:filarioidea). | the effects of 2 growth regulators, diflubenzuron (dfb) and oms 2017, on the ability of females aedes aegypti to become infected with molinema dessetae was studied under laboratory conditions. oms 2017 and dfb had no effect on either the amount of blood ingested or the microfilarial load. the infective potential of females that survived dfb treatment was significantly greater than untreated females, but there was no difference between oms 2017-treated and control females. the percentage of infec ... | 1997 | 9152874 |
| attractant resting boxes for rapid collection and surveillance of aedes aegypti (l.) inside houses. | three different resting station designs made of cardboard covered with black cloth were evaluated for their attractiveness to aedes aegypti populations resting inside houses in thailand. box designs attracted more females (but not males) than an open-panel design. thirty to 60% of all adult ae. aegypti resting inside houses were collected by aspirating from 2-4 resting boxes placed inside houses. tall boxes (90 cm) did not attract more females or males than short boxes (45 cm). forty-two percent ... | 1997 | 9152871 |
| evaluation of caribbean strains of macrocyclops and mesocyclops (cyclopoida:cyclopidae) as biological control tools for the dengue vector aedes aegypti. | fifteen caribbean strains of copepods were assessed for their predation ability against mosquito larvae. macrocyclops albidus from nariva. mesocyclops aspericornis from oropouche, and mesocyclops longisetus from e1 socorro, trinidad, were most effective against aedes aegypti but not against culex quinquefasciatus. mesocyclops longisetus and me. aspericornis prevented any mosquito survival over 25 wk of observation despite weekly challenges with ae. aegypti. the copepods were tolerant to dosages ... | 1997 | 9152870 |
| methoprene affects the rotation of the male terminalia of aedes aegypti mosquitoes. | the rotation of the male terminalia of aedes aegypti mosquitoes was investigated with chemical surgical, and mechanical methods. neither decapitation nor ventral nerve cord transection affected the postemergence rotation, but methoprene administered to 4th-instar larvae and early instar pupae slowed rotation significantly and, in the case of pupal treatment, also interfered with successful insemination. methoprene appeared to interfere with the developmental maturation of the cross muscles locat ... | 1997 | 9152867 |
| factors favoring houseplant container infestation with aedes aegypti larvae in marília, são paulo, brazil. | since reinvasion of são paulo state by the aedes aegypti (l.) mosquito in 1985, flower pots and vases have been important larval habitats despite educational messages focusing on their control. the objectives of this study were to characterize flower pots and vases as larval habitats with respect to the quantities present and infested, the types of plants involved, and the specific locations of the mosquito larvae; to explore local names for houseplants; and to examine factors affecting acceptan ... | 1997 | 9149524 |
| biological effects of canatoxin in different insect models: evidence for a proteolytic activation of the toxin by insect cathepsinlike enzymes. | canatoxin is a toxic protein isolated from the jackbean, canavalia ensiformis. the toxin injected intraperitoneally is lethal for mice and rats; however, it is inactive if given orally. in this study, manduca sexta (l.) (lepidoptera), schistocerca americana (drury) (orthoptera), drosophila melanogaster (l.) (diptera), aedes aegypti (l.) (diptera), rhodnius prolixus (stål) (hemiptera), and callosobruchus maculatus (f.) (coleoptera) were fed on canatoxin-containing diets. no effects were seen in m ... | 1997 | 9145031 |
| an ultrastructural study on the early cellular response to dirofilaria immitis (nematoda) in the malpighian tubules of aedes aegypti (refractory strains). | dirofilaria immitis living in aedes aegypti refractory strains were studied in relation to ultrastructural events in primary cells of malpighian tubules and to defense mechanisms activated by host-cells. when the microfilaria reaches the malpighian cells, its intracellular development is blocked by defense mechanisms activated by the host, resulting in lysis of the outermost cuticle of the parasite without melanin involvement. ultrastructural evidence suggests that lysis is brought about by malp ... | 1994 | 9140500 |
| rapid and efficient removal of immature aedes aegypti in metal drums by sweep net and modified sweeping method. | a modified sweeping method was developed using a cotton sweep net for control of ae. aegypti immatures in 200 liter (44 gallon) metal drums which are major sources of breeding in yangon. laboratory experiments revealed that with only 4 sweeps (approximately 10 minutes duration), the mean % removal (+/- sd) of ae. aegypti fourth stage larvae was 88.5% +/- 1.47. this was followed by a field study undertaken in sanchaung township, yangon. twenty-eight drums with moderate (< 500 immatures) to high ( ... | 1995 | 9139390 |
| the 1993 epidemic of dengue fever in mangalore, karnataka state, india. | an epidemic of febrile illness with hemorrhagic manifestations occurred in certain parts of mangalore city, karnataka state, india, from the last week of july 1993. the epidemic reached its peak by mid-august and then started declining. sporadic cases, however, continued to occur till early december. about 200 cases were reported covering all age groups and both sexes. the cases presented with pyrexia, myalgia, arthralgia and headache. palatal petechiae, magenta colored tongue with central coati ... | 1995 | 9139379 |
| analysis of the mosquito lysosomal aspartic protease gene: an insect housekeeping gene with fat body-enhanced expression. | in the fat body of insects with cyclic egg maturation, lysosomes play a critical role in the termination of vitellogenesis by selectively degrading the secretory machinery involved in the massive production of yolk protein precursors. to investigate this fat body-specific lysosomal activity in the mosquito, a cathepsin d-like aspartic protease (lap) was previously purified and its cdna cloned. here we report the isolation of the aalap gene from an aedes aegypti genomic library. the transcribed r ... | 1997 | 9134712 |
| cdna cloning and pattern of expression of an adult, female-specific chymotrypsin from aedes aegypti midgut. | a cdna for a midgut chymotrypsin, induced by a blood meal, has been cloned and sequenced from the mosquito aedes aegypti. the 938 base sequence codes for a 268 amino acid protein, which contains an 18-residue signal peptide and a seven-residue activation peptide. the deduced amino acid sequence contains several features typical of chymotrypsin proteases, including the catalytic triad of serine proteases and the residues that determine the chymotrypsin substrate specificity pocket. the chymotryps ... | 1997 | 9134710 |
| effects of the neem tree compounds azadirachtin, salannin, nimbin, and 6-desacetylnimbin on ecdysone 20-monooxygenase activity. | the effects of azadirachtin, salannin, nimbin, and 6-desacetylnimbin on ecdysone 20-monooxygenase (e-20-m) activity were examined in three insect species. homogenates of wandering stage third instar larvae of drosophila melanogaster, or abdomens from adult female aedes aegypti, or fat body or midgut from fifth instar larvae of manduca sexta were incubated with radiolabeled ecdysone and increasing concentrations (from 1 x 10(-8) to 1 x 10(-3) m) of the four compounds isolated from seed kernels of ... | 1997 | 9131784 |
| the feasibility of eradicating aedes aegypti in the americas. | 1997 | 9128110 | |
| domestic breeding sources and their contribution in anopheles stephensi breeding in dindigul, tamil nadu. | longitudinal study taken up for one year in 10 different types of breeding habitats in dindigul town, tamil nadu, revealed that out of 51,785 habitats 225 (0.43%) were found positive for anopheles stephensi immatures. the overall positivity varied between 0.03 to 1.31% with peak density during july. the observed habitat-wise positivity was overhead tanks 0-7.07%; wells 0-1.69%; under ground tanks 0-2.26%; tappits 0-2.36%; outside tanks (permanent) 0-2.42%; outside tanks (temporary) 0-0.39%; insi ... | 1996 | 9125833 |
| 4-deoxyannomontacin and (2,4-cis and trans)-annomontacinone, new bioactive mono-tetrahydrofuran annonaceous acetogenins from goniothalamus giganteus. | 4-deoxyannomontacin (1) and a mixture of (2,4-cis and trans)-annomontacinone (2), new bioactive mono-tetrahydrofuran (thf) gamma-lactone and keto-lactone acetogenins, respectively, as well as five known mono-thf acetogenins [xylomaticin, longifolicin, longicoricin, (2,4-cis and trans)-gigantetrocinone, and (2,4-cis and trans)-gigantetroneninone], were isolated from the bark of goniothalamus giganteus (annonaceae) by activity-directed fractionation using the brine shrimp lethality test (bst). the ... | 1997 | 9113333 |
| parasites of the asian tiger mosquito and other container-inhabiting mosquitoes (diptera:culicidae) in northcentral florida. | seven microorganisms including 4 protozoans, 2 fungi, and a bacterium infected aedes albopictus (skuse) larvae collected from 12 counties in northecentral florida. ae albopictus and 14 other species of mosquitoes were collected from tires, flower-holding vases in cemeteries, other types of artificial containers, and treeholes. ascogregarina taiwanensis (lien & levine) was the most common parasite of ae. albopictus throughout the year. the microsporidium vavraia culicis (weiser) infected aedes ae ... | 1997 | 9103767 |
| a single cdna encodes all three aedes leucokinins, which stimulate both fluid secretion by the malpighian tubules and hindgut contractions. | a cdna encoding preproleucokinin was isolated from a cdna library of the mosquito aedes aegypti. the deduced amino acid sequence of aedes preproleucokinin contains a putative signal peptide of 18 amino acid residues and a 210-amino acid residue proleucokinin. within the proleucokinin are encoded one copy each of the aedes leucokinins 1, 2, and 3 isolated previously from this species (veenstra, j. a. (1994) biochem. biophys. res. commun. 202, 715-719). all three aedes leucokinins depolarize the t ... | 1997 | 9099680 |
| fish landmarks for aedes aegypti chromosomes. | aedes aegypti metaphase chromosome landmarks have been developed so that each chromosome of the haploid genome can be unambiguously identified and oriented by fluorescence in situ hybridization (fish) and digital imaging microscopy. the fish tags were derived from three cosmids that contain repetitive ae. aegypti sequences and their unique fish tagging characteristics are demonstrated. the sequence of the three chromosomal tags revealed that the chromosome 1 tag is an 18s fragment from the ribos ... | 1997 | 9099584 |
| insulin-mediated secretion of ecdysteroids from mosquito ovaries and molecular cloning of the insulin receptor homologue from ovaries of bloodfed aedes aegypti. | the reproductive cycle of female mosquitoes is activated by ingestion of blood from vertebrate hosts. shortly after feeding, neurohormones are released from the brain neurosecretory system and stimulate the ovaries to secrete ecdysteroids, which are necessary for vitellogenesis by the fat body. because bombyxins, which are insulin-like peptides, stimulate ecdysteriodgenesis in silkworm larvae, we tested porcine insulin and found that it activates ecdysteroidogenesis and protein synthesis in ovar ... | 1997 | 9099579 |
| cloning and analysis of the locus for mosquito vitellogenic carboxypeptidase. | vitellogenic carboxypeptidase is a 53 kda yolk protein produced by the fat body of the female mosquito, aedes aegypti, in response to a blood meal. its expression is sex-, stage- and tissue-specific and is identical to that of the major yolk protein, vitellogenin. the gene is intronless and two alleles have been cloned and sequenced, including more than 1.5 kb on both sides of the coding region. a capsite consensus recently identified as an arthropod initiator is present at the start site of tra ... | 1993 | 9087558 |
| isolation, sequencing and characterization of two cdna clones coding for trypsin-like enzymes from the midgut of aedes aegypti. | in order to understand the regulation of trypsin genes by the blood meal, we constructed a cdna library from mrna isolated from midguts of blood-fed female aedes aegypti. the library was screened with a drosophila melanogaster trypsin-like gene; twelve cdnas were isolated and sequenced. two clones were 846 bp and 788 bp long with 762 bp and 716 bp open reading frames, respectively. the cdnas were identified as coding for serine proteases by the presence of conserved serine, histidine and asparti ... | 1993 | 9087545 |
| a comparison of three methods for isolating rna from mosquitoes. | the two most common protocols for rna isolation, chirgwin et al., 1979, and chomczynski & sacchi, 1987, were compared with a protocol using glass powder. the quality of the recovered rna was tested using agarose gels and northern hybridization. with the glass powder protocol, we consistently obtained intact rna, whereas with the other protocols we often obtained degraded rna. using specific radioactive probes, we measured ribosomal rna and trypsin mrna recovered from fed adult aedes aegypti fema ... | 1993 | 9087539 |
| cloning and sequencing of the blood meal-induced late trypsin gene from the mosquito aedes aegypti and characterization of the upstream regulatory region. | a 4.1 kb genomic clone of the late trypsin gene from the mosquito aedes aegypti was isolated, mapped and subcloned. a 1.6 kb subclone, corresponding to 1.1 kb of upstream regulatory region and 0.5 kb of coding region, was sequenced. the gene has no introns within the coding region. the 5' end of the mature mrna was mapped using primer extension analysis. a tata box consensus sequence (tataaa) was found at position -31 from the 5' end of the mature mrna. a cluster of five repeat sequences homolog ... | 1993 | 9087537 |
| pupal survey: an epidemiologically significant surveillance method for aedes aegypti: an example using data from trinidad. | this report documents the results of a country-wide pupal survey of aedes aegypti (l.) conducted in trinidad. the survey was designed to identify the important ae. aegypti-producing containers, importance being a function of a container's abundance and its productivity. results are summarized on a country-wide basis and by county: urban versus rural comparisons are also made. numerically, the most common water-filled containers positive for the larvae or pupae of ae. aegypti (foci) were outdoor ... | 1997 | 9080874 |
| the putative cell cycle gene, enhancer of rudimentary, encodes a highly conserved protein found in plants and animals. | the enhancer of rudimentary gene, e(r), in drosophila melanogaster encodes a protein, er, whose function has been implicated in pyrimidine biosynthesis and the cell cycle (wojcik et al. (1994) genetics 138, 1163-1170). in order to identify conserved regions of the protein and potentially important functional domains, the e(r) gene was cloned and sequenced from two other insects (drosophila virilis and aedes aegypti) and three vertebrates (homo sapiens, mus musculus, and brachydanio rerio) and se ... | 1997 | 9074495 |
| biochemical, molecular, and phylogenetic analysis of pyruvate carboxylase in the yellow fever mosquito, aedes aegypti. | pyruvate carboxylase (pc, pyruvate: carbon dioxide ligase [adp-forming], ec 6.4.1.1) was purified from the yellow fever mosquito, aedes aegypti. the purified pc showed two polypeptides of similar m(r) (133 and 128 k). the n-terminal sequences of both polypeptides were shown to be very similar, if not identical. a polyclonal antiserum against the 133 kda polypeptide cross-reacted strongly with the 128 kda polypeptide. pc was found in all tissues examined. using a semi-quantitative western blot as ... | 1997 | 9066123 |
| virulence, parasite mode of transmission, and host fluctuating asymmetry. | horizontally transmitted parasites are broadly predicted to be more virulent, or costly to host fitness, than those with vertical transmission. this is mainly because vertical transmission, from host parent to offspring, explicitly links the reproductive interests of both parties. underlying this prediction is a general assumption that parasite transmission success is positively correlated with its virulence. we report results where infection of larval yellow fever mosquitoes aedes aegypti with ... | 1997 | 9061958 |
| lipophorin levels in the yellow fever mosquito, aedes aegypti, and the effect of feeding. | high density lipophorin (hdlp) is the major lipid transport vehicle in insect hemolymph. using an indirect elisa, levels of hdlp were measured in the yellow fever mosquito, aedes aegypti. the level of lipophorin, when normalized to the total weight of the insect, was similar in the different developmental stages. starvation (access to water only) of adult females did not affect the level of hdlp nor its density when compared to sugar-fed females. on the other hand, blood feeding (of normally sug ... | 1997 | 9055439 |
| newsletters as a channel for communication in a community-based aedes aegypti control program in marília, brazil. | in marília, brazil, community newsletters were established in a pilot project on community-based aedes aegypti control. the newsletters were an excellent way of promoting communication between community members and project personnel. while people might not have attended a dengue meeting, they did turn up at meetings to plan the newsletters. during these meetings project staff obtained information about the communities that was crucial for planning a community-based recycling project that targete ... | 1996 | 9046485 |
| ultralow volume application of bacillus thuringiensis ssp. israelensis for the control of mosquitoes. | evaluation of the effectiveness of bacillus thuringiensis ssp. israelensis (b.t.i.) against mosquito larvae dispersed by ultralow volume (ulv) spraying was conducted in simulated field trials. effectiveness was measured using 3 different indicators: larval mortality, colony-forming unit enumeration, and droplet analysis. b.t.i. was dispersed with a ulv generator using 2 different flow rates: 0.3 and 0.5 liter/min on 2 different days. based on the results of this study, it can be concluded that a ... | 1996 | 9046471 |
| dengue vector mosquitos at a tourist attraction, ko samui, in 1995. | on ko samui, thailand there were two epidemics of dengue hemorrhagic fever (dhf) in 1966 and 1967, followed by endemics up to 1994. aedes aegypti and aedes albopictus were the vectors. from january to july 1995, 51 cases of dhf were reported, out of these were many foreigners who still suffer from dengue fever and return home with negative impression. we carried out an entomological survey around the island and collected the mosquitos to detect dengue virus by digoxigenin-cdna probe. the data re ... | 1996 | 9031420 |
| toxicity of insecticides to toxorhynchites splendens and three vector mosquitos and their sublethal effect on biocontrol potential of the predator. | toxicity of six larvicides ie fenthion, temephos, malathion, deltamethrin, alphamethrin (fendona), oms 3031 and five adulticides ie malathion, fenitrothion, propoxur, deltamethrin, permethrin to aedes aegypti, culex quiquefasciatus, anopheles stephensi and the predator, toxorhynchites splendens was studied for evaluating safety margin. concentrations of alphamethrin that killed 50% larvae of t. splendens were 53 and 12 times more than that which killed cx. quinquefasciatus and ae. aegypti. in ca ... | 1996 | 9031419 |
| characterization of aedes communis, aedes aegypti and anopheles stephensi mosquito saliva antigens by immunoblotting. | mosquito bites cause immediate wheals and delayed bite papules in sensitized subjects having saliva-specific ige and igg4 antibodies. at present, mosquito saliva antigens are not well characterized. | 1997 | 9030098 |
| [detection of aedes aegypti and aedes albopictus, in an urban zone of the municipality of catanduva, sp, after control of a dengue epidemic]. | after the realization of control research that had in view the transmission of dengue virus, we started to monitor two kinds of entomological vigilance, breteau index and ovitrap. we intended to evaluate the necessary time elapsed before aedes sp mosquitoes were again detected at the urban area of catanduva s town (sp). the ovitraps showed positiveness for the aedes aegypti two months after the control research, while the breteau index became positive only at the fourth month after the end of th ... | 1996 | 9026829 |
| identification of a gene for cyt1a-like hemolysin from bacillus thuringiensis subsp. medellin and expression in a crystal-negative b. thuringiensis strain. | a gene designated cyt1ab1, encoding a 27,490-da protein, was isolated from bacillus thuringiensis subsp. medellin (h30 serotype) by using an oligonucleotide probe corresponding to the cyt1aa1 gene. the sequence of the cyt1ab1 protein, as deduced from the sequence of the cyt1ab1 gene, was 86% identical to that of the cyt1aa1 protein and 32% identical to that of the cyt2aa1 protein from b. thuringiensis subsp. kyushuensis. the cyt1ab1 gene was flanked upstream by a p21 gene, in the same orientatio ... | 1997 | 9023925 |
| transovarial transmission of dengue 3 virus by aedes aegypti. | 1996 | 9015501 | |
| bioactive compounds from taiwania cryptomerioides. | two new sesquiterpenes, 10 alpha-hydroxyamorphan-4-en-3-one (1) and 4 alpha-methylcadinane-4 alpha-methyl-1 alpha,2 alpha,10 alpha-triol (2), together with four known compounds, sesquiterpenes 10 alpha-hydroxycadinan-4-en-3-one (3) and alpha-cadinol (4), diterpene ferruginol and lignan helioxanthin, were isolated from the whole plant of taiwania cryptomerioides under bioassay-guided fractionations. the structures of 1 and 2 were elucidated mainly by the nmr spectroscopic analyses. bioactivities ... | 1997 | 9014350 |
| juvenile hormone controls early trypsin gene transcription in the midgut of aedes aegypti. | early trypsin is a female-specific protease present in the aedes aegypti midgut during the first few hours after ingestion of a blood meal. the enzymatic activity of early trypsin plays an essential role in the transcriptional activation of the late trypsin gene, which encodes the major midgut endoprotease involved in blood meal protein digestion. transcription of the early trypsin gene is part of the normal post-emergence maturation of the midgut in the adult female. abdominal ligation within 1 ... | 1997 | 9013256 |
| mosquito hexamerins: characterization during larval development. | we report here the first examination of hexamerins expressed during mosquito larval development. haemolymph proteins from fourth-instar larvae of six species representing the two major subfamilies of mosquitoes were characterized by immunoblotting using antisera to calliphorin, the major hexamerin of the blowfly. calliphora vicina, or to lsp1 or lsp2, the two distinct hexamerins of drosophila melanogaster. in each mosquito species the antisera demonstrated the presence of multiple abundant hexam ... | 1997 | 9013251 |
| [description of the colonization of aedes albopictus (diptera: culicidae) in the region of saõ josé do rio preto, sp, 1991-1994]. | this study aims to describe and analyze the colonization of aedes albopictus whose presence was detected in 1991 in the area of sào josé do rio. preto already colonized by the aedes aegypti. year and month of occurrence, counties, composition and location of larval samples, kinds of containers, average number of larvae an breteau index bare been analyzed from the information obtained in measurements of larval density by superintendência de controle de endemias (sucen). the presence of aedes albo ... | 1996 | 9011878 |
| nad(p)h-dependent production of oxygen reactive species by the salivary glands of the mosquito anopheles albimanus. | salivary gland homogenates of the adult female mosquito anopheles albimanus, but not those of aedes aegypti, induced light production in the presence of nadph and luminol, indicating a nadph oxidase activity producing reactive oxygen species (superoxide anion) by the anopheline salivary homogenate. superoxide production by the anopheline salivary homogenate was also confirmed by the nadph-dependent, superoxide dismutase inhibitable, reduction of cytochrome c. the nadph oxidase reaction measured ... | 1996 | 8995793 |
| in vivo effect of a natural aedes aegypti defensin on brugia pahangi development. | 1996 | 8994145 | |
| the effect of chitin synthesis inhibitors on the development of brugia malayi in aedes aegypti. | two chitin synthesis inhibitors (csis) viz., triflumuron and hexaflumuron interfere++ with the development of brugia malayi in aedes aegypti (a black-eyed liverpool strain). the development of b. malayi was slow in both the treated populations and the infection rate, infectivity rate and l3 load per mosquito decreased significantly (p < 0.001) in comparison with untreated controls. hexaflumuron was found to be more inhibiting than triflumuron. | 1996 | 8984113 |
| [the yeast flora of blood-sucking mosquitoes]. | yeast flora composition has been studied in natural populations of blood-sucking mosquitoes of genera aedes. anopheles and culex dwelling in the territory of ukraine. the authors have distinguished 18 yeast species belonging to 7 genera. species candida famata, c. (yarrowia) lipolytica as well as the yeast of genera rhodotorula and cryptococcus dominate on the larvae and imago of mosquitoes. the distinguished strains are the components of normal microflora of blood-sucking mosquitoes and take no ... | 1996 | 8983519 |
| disposable containers as larval habitats for aedes aegypti in a city with regular refuse collection: a study in marília, são paulo state, brazil. | in marília, brazil, refuse is collected at least every other day, yet non-useful, non-returnable containers such as cans, plastic bottles and tires account for almost half of the container habitats found positive for the aedes aegypti mosquito. a study was therefore conducted to investigate why these containers exist despite regular refuse collection and a high level of awareness of dengue prevention, and how the control program could most effectively respond. differing community perceptions as ... | 1996 | 8971274 |
| changes in ribosomal protein rpl8 mrna during the reproductive cycle of the mosquito, aedes aegypti. | changes in the abundance of ribosomal protein rpl8 mrna were compared with 18s rrna and vitellogenin mrna in fat body from adult female aedes aegypti during the reproductive cycle. levels of rpl8 mrna began to increase within 2 h after adult eclosion, peaked at about 24 h post-eclosion, and remained high throughout the next 48 h. during this same period, rrna abundance increased about 2-fold. after the bloodmeal, levels of rpl8 mrna gradually decreased over the next 48 h, while rrna levels incre ... | 1996 | 8969467 |
| endogenous regulation of the attraction of aedes aegypti mosquitoes. | even when host attractants are present, there are times when endogenous physiological mechanisms prevent female mosquitoes from responding to them and engaging in host-seeking behavior. these times include a brief postemergence period, periods of the day determined by a circadian clock, and following a blood meal before and after eggs develop, which are controlled by nervous and humoral mechanisms. other factors such as age, nutrition, and mating status can further modulate host-seeking behavior ... | 1994 | 8965086 |
| sensory bases of attractancy: morphology of mosquito olfactory sensilla-- a review. | the internal and external ultrastructure of virtually all of the olfactory sensilla of the mosquitoes aedes aegypti and anopheles stephensi have been described. many other mosquitoes have had their olfactory complements partially described. this review summarizes ultrastructural features and suspected biological roles of the small sensilla coeloconica, large sensilla coeloconica, sensilla ampullaceae, grooved pegs and sensilla trichodea of mosquito antennae, and the capitate pegs of mosquito pal ... | 1994 | 8965084 |
| muscle actin gene from aedes aegypti (diptera:culicidae). | a recombinant phagemid containing a 1,240-bp insert encoding an actin was isolated from a yellow fever mosquito, aedes aegypti (l.), complementary dna library. this insert (pbs-act35) contained an open reading frame of 822 bp whose deduced amino acid sequence exhibited > 95% homology with the carboxyl terminal 274 amino acids of drosophila melanogaster meigen and silkworm, bombyx mori (l.), actin genes. reverse transcriptase-polymerase chain reaction was used to clone and determine the sequence ... | 1996 | 8961646 |
| peritrophic matrix proteins of anopheles gambiae and aedes aegypti. | little is known about the composition and function of the mosquito peritrophic matrix (pm), a physical barrier that pathogens must traverse to complete their life cycles. anopheles gambiae and aedes aegypti pm proteins induced by blood or by a protein-free meal have been characterized by the use of 2-d gel electrophoresis and lectin-binding affinity assays. more than forty proteins have been identified in both species. over half of the pm proteins of both mosquitoes migrate identically. many pm ... | 1996 | 8933177 |
| pathogenicity of the aedes albopictus parvovirus (aapv), a denso-like virus, for aedes aegypti mosquitoes. | aapv, a denso-like virus isolated from a c6/36 clone of the aedes albopictus cell line, proved to be very pathogenic for aedes aegypti first and third instar larvae following per os infection. the mortality reached 90% in 10 days for larvae infected at the first instar. several factors, such as temperature, larval density and stage, and duration of contact with infectious particles, influenced infection. the virus titer in females surviving infection at the third larval instar reached 10(8) tcid ... | 1996 | 8931366 |
| dengue fever at the u.s.-mexico border, 1995-1996. | dengue is a mosquito-transmitted acute disease caused by any of four virus serotypes (den-1, den-2, den-3 and den-4) and is characterized by acute manifestations that can include fever, headache, myalgia, arthralgia, rash, nausea, and vomiting. on august 25, 1995, public health authorities in mexico notified the texas department of health (tdh) of an ongoing outbreak of dengue fever in the state of tamaulipas, which borders south texas. because of the year-round presence of the aedes aegypti mos ... | 1996 | 8927003 |
| apyrase and alpha-glucosidase in the salivary glands of aedes albopictus. | an apyrase and an alpha-glucosidase were detected in the salivary glands extracts of adult aedes albopictus. the apyrase is a 61,000 da secreted protein that hydrolyses atp and adp. this protein is synthe-sized in adults and is preferentially accumulated in the distal lateral lobes of the female salivary glands. the alpha-glucosidase is a secreted 67,000 da protein. this enzyme is synthesized during adult life and accumulated in the proximal-lateral lobes of both males and females. the results a ... | 1996 | 8925436 |
| [dengue in french guiana. history and present status]. | the evolution of dengue in french guiana has the same trend as in most tropical american countries, with emergence of dengue hemorrhagic fever (dhf) and endemicity of the disease. during the 1940's, several dengue-like outbreaks were reported from french guiana. then, the only dengue vector, aedes aegypti, was eradicated between 1950 and 1963, when it started to reinfest the country. by the end of the 1960's, new dengue epidemics with serological confirmation were described. after 1970, the firs ... | 1996 | 8924782 |
| [dengue in the americas]. | dengue fever is endemic from argentina to mexico, where serotypes 1, 2 and 4 are in wide circulation. after an absence of almost 20 years, serotype 3 arrived in central america in late 1994. over the past decade dengue has become a major public health problem in many of these countries, with an increase in the prevalence of dengue haemorrhagic fever and in the number of fatal cases. the situation is not new; there is evidence of a least eight pandemics from the early 19th century until the initi ... | 1996 | 8924781 |
| [the situation of dengue in the world]. | the situation of dengue in the world can be summarized as follows: 2,5 billions persons at risk, 60 millions cases per year, and 30 000 deaths per year. the four dengue serotypes, den-1, den-2, den-3 and den-4 are nearly human-specific. clinical symptoms of dengue vary from unapparent infection, mild febrile manifestations to hemorrhagic forms with or without shock syndrome. dengue viruses are transmitted by aedes mosquitoes, the most important vectors being aedes aegypti and aedes albopictus. t ... | 1996 | 8924780 |