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Wyświetlanie 1-15 z 34
Tytuł:
Anopheline mosquitoes and the malaria scourge
Autorzy:
Nwabor, ---
Forstinus, O.
Powiązania:
https://bibliotekanauki.pl/articles/970630.pdf
Data publikacji:
2015
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
mosquito
malaria
larviciding
environmental sanitation
insecticides
Opis:
The high prevalence of malaria in Africa has defiled many strategies aimed at its eradication. Researchers from various fields have tried without success in this fight against mosquito and its malaria disease. Annually billions of dollars are spent in the design of programs which are aimed at combating this dreaded disease. However all this spending seems to go down the drain as malaria and its vector mosquitoes celebrate their unflinching victory. Current control measures focusing on ways of preventing the disease vis- a -vis, protect man from the vectors “anopheline mosquito” are the mainstay of malaria prevention and control. Many of these control measures are operational with each contributing in its little way. The use of Long Lasting Insecticide Treated Nets (LLITN) and Indoor Residual Sprays (IRS) are well established strategies with global recognition and currently ongoing in Africa. However, as a result of shortcomings in these major control measures, new strategies with hopes of blissful success are been sought after. Larviciding (abortion of metamorphosis) and constant and adequate environmental sanitation seems to be the next option available for use. This article therefore takes a look at the vector- anopheline mosquito, its ecology, productivity and distribution. It also considers malaria and the various control and preventive measures currently targeted at its eradication.
Źródło:
International Letters of Natural Sciences; 2015, 46
2300-9675
Pojawia się w:
International Letters of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Binding of Aedes aegypti trypsin modulating oostatic factor [Aea-TMOF] to its receptor stimulates phosphorylation and protease processing of gut-membrane proteins
Autorzy:
Borovsky, D.
Hamdaoui, A.
Powiązania:
https://bibliotekanauki.pl/articles/55079.pdf
Data publikacji:
2008
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
protease processing
Aedes aegypti
electrophoresis
trypsin modulating oostatic factor
phosphorylation
mosquito
insect
larva
gut-membrane protein
fluorography
gut receptor
Opis:
The binding of TMOF to its gut receptor was followed by incubating guts removed from male and female Aedes aegypti. TMOF at physiological concentrations, in the presence of [γ32P]ATP, causes phosphorylation and release of gut-membrane protein (45 kDa) that is further processed by proteolysis. In the presence of protease inhibitors only the 45 kDa protein was released. The phosphorylation and processing of the 45 kDa protein does not happen in the absence of TMOF. Both larvae and adult guts release the protein in the presence of TMOF. Male Ae. aegypti do not synthesize trypsin in their gut and do not release the 45 kDa protein in the presence of TMOF because a TMOF receptor is probably absent. Homogenized guts do not release the 45 kDa protein, indicating that the protease processing or the ecto-protein kinase activity is probably reduced after breaking the tissue. The 45 kDa phosphorylated protein can be dephosphorylated by alkaline phosphatase and protein phosphatase, indicating that the phosphate group is covalently linked to either a serine or a tyrosine moiety. This is the first report that shows that in insects, binding of a peptide hormone activates its receptor by proteolysis.
Źródło:
Pestycydy; 2008, 1-2; 13-25
0208-8703
Pojawia się w:
Pestycydy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bloodsucking arthropods: the danger for travellers and hazard of vector travelling
Autorzy:
Alekseev, A
Dubinina, H.
Powiązania:
https://bibliotekanauki.pl/articles/840237.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
malaria
zoonosis
leishmaniasis
HIV carrier
sand-fly
ehrlichiosis
dog
arthropod
mosquito
borreliosis
anthroponosis
tick
Opis:
The newly obtained data supplemented our knowledge about risk for travellers, tourists and natives of Europe connected with malaria, leishmaniasis and other tropical diseases. It was discovered that healthy carriers of Epstein-Barr virus (nearly 90% of human population) have a great risk to get chronic Burkitt lymphoma disease as a result of Plasmodium falciparum (tropical malaria agent) infection. HIV carriers being occasionally in contact with visceral leishmaniasis vectors (sand-flies infected on dogs in the Mediterranean area) not only got a heavy form of disease but became a source of infection for healthy people. Airport malaria and outbreaks of dengue fever sometimes were (and are) connected with an import of infective Anopheles or Aedes mosquitoes. The high risk of borreliosis and ehrlichiosis infection exists in the forested European areas along the highways, where picnics and other types of recreation of travellers and tourists are typical and where the anthropogenically changed Ixodes ticks subpopulations are distributed. Such physiologically changed part of tick population is more aggressive and «changed ticks» more often are vectors of one, two or even more agent species simultaneously.
Źródło:
Annals of Parasitology; 2001, 47, 1
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bloodsucking arthropods: the danger for travellers and hazard of vector travelling
Autorzy:
Alekseev, A.
Dubinina, H.
Powiązania:
https://bibliotekanauki.pl/articles/2147852.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
malaria
zoonosis
leishmaniasis
HIV carrier
sand-fly
ehrlichiosis
dog
arthropod
mosquito
borreliosis
anthroponosis
tick
Opis:
The newly obtained data supplemented our knowledge about risk for travellers, tourists and natives of Europe connected with malaria, leishmaniasis and other tropical diseases. It was discovered that healthy carriers of Epstein-Barr virus (nearly 90% of human population) have a great risk to get chronic Burkitt lymphoma disease as a result of Plasmodium falciparum (tropical malaria agent) infection. HIV carriers being occasionally in contact with visceral leishmaniasis vectors (sand-flies infected on dogs in the Mediterranean area) not only got a heavy form of disease but became a source of infection for healthy people. Airport malaria and outbreaks of dengue fever sometimes were (and are) connected with an import of infective Anopheles or Aedes mosquitoes. The high risk of borreliosis and ehrlichiosis infection exists in the forested European areas along the highways, where picnics and other types of recreation of travellers and tourists are typical and where the anthropogenically changed Ixodes ticks subpopulations are distributed. Such physiologically changed part of tick population is more aggressive and «changed ticks» more often are vectors of one, two or even more agent species simultaneously.
Źródło:
Wiadomości Parazytologiczne; 2001, 47, 1; 33-37
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Control of Aedes aegypti larvae with Aea-TMOF mimics: aromatic derivatives of enoic acid
Autorzy:
Borovsky, D.
Powiązania:
https://bibliotekanauki.pl/articles/55331.pdf
Data publikacji:
2008
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
insecticide
insect growth inhibition
enoic acid
Aedes aegypti
bioorganic insecticide
trypsin biosynthesis
trypsin modulating oostatic factor
mosquito
insect
organic mimics
larva
gut receptor
Opis:
Based on the 3D conformation of the N-terminus of TMOF in solution, six aromatic derivatives of enoic acid: 7-biphenyl-4-yl-hept-4-enoic acid (BPHE), 7-(4-butyl-phenyl)-hept-4-enoic acid (BuPHE), 7-cyclohexyl-hept-4-enoic acid (CyHE), 10-phenyl-dec-7-enoic acid (PDE), 7-p-tolyl-hept-2-enoic acid ethyl ester (THEEE) and 7-(4-methoxy-phenyl)-hept-2-enoic acid ethyl ester (MPEEE) were computer-modeled and synthesized. Treating first instar Aedes aegypti larvae with different concentrations of the TMOF mimics showed that addition of butyl to the benzyl ring, use of p-tolyl or converting the benzyl ring into cyclohexane increased the biological activity of the mimics by 5.2, 5.0 and 3.8-fold, respectively. Esterifying the carboxyl terminus into ethyl ester and addition of a methoxy group to the benzyl ring also increased, by 2-fold, the biological activity of the derivative. The position of the double bond in the aliphatic chain is important for enhanced biological activity. Aea-TMOF and CyHE fed to mosquito larvae equally inhibited trypsin biosynthesis in larvae for the first 24 h. The biological activity of CyHE, however, rapidly declined 2-3 days later, whereas TMOF activity stayed stable. These results indicate that TMOF organic mimics, although potent, need to be formulated in order to be more stable for future field applications.
Źródło:
Pestycydy; 2008, 1-2; 27-34
0208-8703
Pojawia się w:
Pestycydy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Control of mosquito larvae with TMOF and 60 kDa Cry4Aa expressed in Pichia pastoris
Autorzy:
Borovsky, D.
Nauwelaers, S.
Van Mileghem, A.
Meyvis, Y.
Laeremans, A.
Theunis, C.
Bertier, L.
Boons, E.
Powiązania:
https://bibliotekanauki.pl/articles/55188.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
mosquito
mosquito control
larva
Pichia pastoris
genetic engineering
biological control
Cry4Aa 678 fragment
human disease
malaria
insecticide
trypsin modulating oostatic factor
Bacillus thuringiensis ssp.israelensis
Cry toxin
Opis:
Cry4Aa 678 amino acids fragment (60 kDa) was cloned into Escherichia coli. After induction with IPTG the 60 kDa Cry4Aa fragment was purified by Ni chromatography, separated by SDS PAGE and identified by mass spectrometry (MS/MS). The 60 kDa Cry4Aa fragment exhibited high toxicity towards Ae. aegypti larvae. The earlier results [1] show that Pichia pastoris yeast cells expressing tmfA (synthetic gene coding for the Trypsin Modulating Oostatic Factor of Ae. aegypti) together with E. coli cells expressing Bti toxin genes (cry4Aa, cry11Aa, cyt1Aa and p20) are synergistic. Therefore, P. pastoris, which synthesizes high amounts of heterologous proteins was genetically engineered to produce TMOF and Cry4Aa. Codon-optimized synthetic genes, cry4Aa-tmfA, gst-cry4Aa-tmfA, tmfA and gfptmfA that were expressed by P. pastoris and fed to Ae. aegypti larvae caused 90% mortality. GST (glutathione-S-transferase) enhanced the activity of Cry4Aa-TMOF and protected it from heat denaturation and GFP (Green Fluorescent Protein)- TMOF allowed us to follow yeast cells consumption by individual larva using fluorescent microscopy. This report shows for the first time that 60 kDa Cry4Aa and TMOF expressed together in P. pastoris are highly toxic to Ae. aegypti larvae.
Źródło:
Pestycydy; 2011, 1-4
0208-8703
Pojawia się w:
Pestycydy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detection of Setaria tundra microfilariae in mosquito populations from irrigated fields in Wroclaw (Poland)
Autorzy:
Rydzanicz, K.
Lonc, E.
Masny, A.
Golab, E.
Powiązania:
https://bibliotekanauki.pl/articles/5818.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
detection
Setaria tundra
microfilaria
filariasis
mosquito
animal population
irrigated field
Wroclaw city
Polska
Źródło:
Annals of Parasitology; 2016, 62, Suppl.
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Do ownership of mosquito nets, dwelling characteristics and mothers’ socio-economic status influence malaria morbidity among children under the age of 5 in Cameroon?
Autorzy:
Oyekale, Abayomi S.
Powiązania:
https://bibliotekanauki.pl/articles/2177342.pdf
Data publikacji:
2015-04-17
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
malaria
mosquito nets
under-5 children
Cameroon
Opis:
Objectives This study analyzed the effect of the number of mosquito nets that are owned by households, dwelling characteristics and maternal demographic characteristics on malaria infections. Material and Methods The 2011 Demographic and Health Survey (DHS) data for children under 5 years of age were used. The children were subjected to haemoglobin test and rapid diagnostic test (RDT) to ascertain the presence of malaria parasites. Data were analyzed using probit regression method. Results It was found that 2.43% and 8.68% of the children were living in houses that were prone to landslide and flooding, respectively. Also, 19.93%, 17.08% and 16.26% of the children lived in houses without windows, with broken windows, and with a hole in the roof, respectively. Only 5.59% and 23.96% of the children lived in houses with window and door nets, respectively. Mosquito nets were owned by 64.03% of the households, where Adamawa Region had the lowest coverage (52.23%). Reasons for not owning mosquito nets by all the households included: lack of financial means (25.17%), using something else (1.80%) and not having many mosquitoes in the vicinity (5.53%). In the probit regression, variables that significantly reduced malaria infections among the children (p < 0.05) included: the number of mosquito nets, urban residence, improved toilet, ownership of a radio, residence in flood-prone area, mother’s secondary education, mother’s tertiary education and residence in areas with not many mosquitoes, while infections increased along with the household size, residence in areas prone to landslide, severe anaemia, moderate anaemia, mild anaemia and age of the children. Conclusions Ownership of mosquito nets and dwelling characteristics are critical factors influencing infections with malaria. There is a need to ensure compliance with its use since there are disparities between access and actual usage. Also, addressing malaria problem in Cameroon should consider regional disparity in malaria incidence rates and more engagement of the media, among others, for appropriate sensitization.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2015, 28, 3; 479-497
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Epidemiology of tree-hole breeding mosquitoes in the tropical rainforest of Imo State, South-East Nigeria
Autorzy:
Anosike, J C
Nwoke, B.E.B.
Okere, A.N.
Oku, E.E.
Asor, J.E.
Emmy-Egbe, I.O.
Adimike, D.A.
Powiązania:
https://bibliotekanauki.pl/articles/50771.pdf
Data publikacji:
2007
Wydawca:
Instytut Medycyny Wsi
Tematy:
ecology
South-East Nigeria
yellow fever
mosquito
epidemiology
tree hole
Nigeria
human disease
Imo State
forest reserve
disease vector
rural area
tropical region
Opis:
The study of tree-hole breeding mosquitoes was carried out in the tropical rainforest of Imo State Nigeria (two rural areas and two forest reserves in some parts of Orlu Senatorial Zone) between May – October 2002. Using standard entomological procedures, two macrohabitats (natural tree-holes and bamboo traps) and two microhabitats (leaf axils of cocoyams/pineapples and leaf axils of plantain/banana) were sampled for various mosquito species. Mosquitoes were recovered from all the various biotypes sampled. Types of mosquitoes species encountered, their relative abundance, as well as genera varied signifi cantly during the study (p<0.05). Four genera of mosquitoes: Aedes, Culex, Anopheles and Toxorhynchites were recovered while 16 species of mosquitoes encountered include: Aedes aegypti, Ae. africanus, Ae. simpsoni, Ae. albopictus, Ae. stokesi, Ae. taylori, Ae. apicoargenteus, Culex quinquefasciatus, Cx. nebulosus, Cx. trigripes, Cx. decens, Anopheles gambiae, An. funiestus, An. coustani and Toxorhynchites viridibasis. Most of the mosquitoes showed oviposition preferences for one or more habitats. The presence of Ae. africanus, Ae. simpsoni and Ae. aegypti indicate that the study areas were at risk of yellow fever epidemic. The presence of Anopheles and Culex species ensured endemicity of malaria and fi lariasis, while the recovery of Ae. albopictus in this region suggests a possible outbreak of dengue fever in future if not properly controlled.
Źródło:
Annals of Agricultural and Environmental Medicine; 2007, 14, 1
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 34

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