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Search Results: 1 - 10 of 473693 matches for " Nataly A;Andrade-Coelho "
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Seasonality of Lutzomyia intermedia and Lutzomyia whitmani (Diptera: Psychodidae: Phlebotominae), occurring sympatrically in area of cutaneous leishmaniasis in the State of Rio de Janeiro, Brazil
Souza Nataly A,Andrade-Coelho Claudia A,Vilela Maurício L,Peixoto Alexandre A
Memórias do Instituto Oswaldo Cruz , 2002,
Abstract: Lutzomyia intermedia and Lutzomyia whitmani occur sympatrically in the district of Posse, municipality of Petrópolis, in the State of Rio de Janeiro (114 km from the city of Rio de Janeiro), where sand flies were captured weekly for three consecutive years in both the peridomicile and forest, in two first years from 18:00 to 22:00 h, using a Shannon trap and CDC light traps. The anthropophilic habit was assessed by recording the specimens that bit the human captors. Considering the different capture types and sites, the following species were identified: Brumptomyia brumpti, B. cardosoi, B. guimaraesi, Lutzomyia amarali, L. longipalpis, L. microps, L. costalimai, L. edwardsi, L. firmatoi, L. migonei, L. termitophila, L. tupynambai, L. fischeri, L. pessoai, L. lutziana, L. shannoni, L. barrettoi, L. intermedia, L. whitmani, L. lloydi, and L. minasensis. L. intermedia (38.3%) and L. whitmani (38.6%) predominated. L. intermedia predominated in the peridomicile, where it displayed more intense anthropophily, while L. whitmani displayed greater density in the banana plantations and forest, preferential sites for biting humans. Studies on seasonality showed that while L. intermedia displayed greater density in the hottest months of the year (December, January, and February), L. whitmani was abundant in the coolest months (June, July, and August), although both occurred throughout the year.
Molecular polymorphism, differentiation and introgression in the period gene between Lutzomyia intermedia and Lutzomyia whitmani
Camila J Mazzoni, Nataly A Souza, Claudia Andrade-Coelho, Charalambos P Kyriacou, Alexandre A Peixoto
BMC Evolutionary Biology , 2006, DOI: 10.1186/1471-2148-6-85
Abstract: We analyzed the molecular variation within the clock gene period (per) of these two species in five different localities in Eastern Brazil. AMOVA and Fst estimates showed no evidence for geographical differentiation within species. On the other hand, the values were highly significant for both analyses between species. The two species show no fixed differences and a higher number of shared polymorphisms compared to exclusive mutations. In addition, some haplotypes that are "typical" of one species were found in some individuals of the other species suggesting either the persistence of old polymorphisms or the occurrence of introgression. Two tests of gene flow, one based on linkage disequilibrium and a MCMC analysis based on coalescence, suggest that the two species might be exchanging alleles at the per locus.Introgression might be occurring between L. intermedia and L. whitmani in period, a gene controlling behavioral rhythms in Drosophila. This result raises the question of whether similar phenomena are occurring at other loci controlling important aspects of behavior and vectorial capacity.The Phlebotominae sand flies Lutzomyia intermedia Lutz & Neiva 1912 and Lutzomyia whitmani Antunes & Coutinho 1912 are vectors of cutaneous leishmaniasis in Brazil. These are closely related species that can be only distinguished by a few morphological differences [1] and both show high anthropophily and reported natural infections with Leishmania in different regions of Brazil [2].Despite their importance as vectors, only a handful of studies have been carried out in these two species using molecular techniques [3-6]. One of the most important findings from an epidemiological perspective is the evidence obtained for introgression between the two species using mitochondrial DNA [4]. This was particularly interesting because apparently, only lineages of L. whitmani sympatric with L. intermedia have been involved in cutaneous leishmaniasis transmission in the peridomestic enviro
A new larval diet for colonization of phlebotominae sand flies
Souza Nataly A,Andrade-Coelho Claudia A,Vilela Maurício L,Barbosa André F
Memórias do Instituto Oswaldo Cruz , 1999,
Abstract:
Moonlight and blood-feeding behaviour of Lutzomyia intermedia and Lutzomyia whitmani (Diptera:Psychodidae:Phlebotominae), vectors of American cutaneous leishmaniasis in Brazil
Souza, Nataly A;Andrade-Coelho, Cláudia A;Silva, Vanderlei C;Peixoto, Alexandre A;Rangel, Elizabeth F;
Memórias do Instituto Oswaldo Cruz , 2005, DOI: 10.1590/S0074-02762005000100007
Abstract: lutzomyia intermedia (lutz & neiva, 1912) and l. whitmani (antunes & coutinho, 1939) (diptera: psychodidae: phlebotominae), two important vectors of american cutaneous leishmaniasis in brazil, occur in sympatry in the locality of posse county, petrópolis municipality, state of rio de janeiro, brazil. we investigated the influence of the lunar cycle on the frequency of specimens of the two species caught while attempting to bite the collectors and in cdc light traps. analysis of the numbers of sand flies captured in different lunar phases for two consecutive years in the peridomestic site and forest shows that there is a significant positive correlation between moonlight intensity and the numbers of l. intermedia and l. whitmani females collected while blood-feeding, whereas the opposite was observed for the cdc traps.
Reproductive isolation between sympatric and allopatric Brazilian populations of Lutzomyia longipalpis s.l. (Diptera: Psychodidae)
Souza, Nataly A;Andrade-Coelho, Claudia A;Vigoder, Felipe M;Ward, Richard D;Peixoto, Alexandre A;
Memórias do Instituto Oswaldo Cruz , 2008, DOI: 10.1590/S0074-02762008000200017
Abstract: lutzomyia longipalpis s.l., the main vector of leishmania chagasi in latin america, is a species complex although the exact number of siblings is yet unknown. in brazil, the siblings differ in male copulatory courtship songs and pheromones that most certainly act as pre-zygotic reproductive barriers. here we analysed the reproductive isolation between three allopatric and two sympatric populations of lu. longipalpis s.l. from brazil. the results indicate a strong copulatory and pre-mating isolation between the three allopatric populations. in addition, the results also indicate a stronger pre-mating isolation between the two sympatric siblings than between the three allopatric ones, suggesting a role for reinforcement in the speciation of the lu. longipalpis s.l. complex.
Seasonality of Lutzomyia intermedia and Lutzomyia whitmani (Diptera: Psychodidae: Phlebotominae), occurring sympatrically in area of cutaneous leishmaniasis in the State of Rio de Janeiro, Brazil
Souza, Nataly A;Andrade-Coelho, Claudia A;Vilela, Maurício L;Peixoto, Alexandre A;Rangel, Elizabeth F;
Memórias do Instituto Oswaldo Cruz , 2002, DOI: 10.1590/S0074-02762002000600001
Abstract: lutzomyia intermedia and lutzomyia whitmani occur sympatrically in the district of posse, municipality of petrópolis, in the state of rio de janeiro (114 km from the city of rio de janeiro), where sand flies were captured weekly for three consecutive years in both the peridomicile and forest, in two first years from 18:00 to 22:00 h, using a shannon trap and cdc light traps. the anthropophilic habit was assessed by recording the specimens that bit the human captors. considering the different capture types and sites, the following species were identified: brumptomyia brumpti, b. cardosoi, b. guimaraesi, lutzomyia amarali, l. longipalpis, l. microps, l. costalimai, l. edwardsi, l. firmatoi, l. migonei, l. termitophila, l. tupynambai, l. fischeri, l. pessoai, l. lutziana, l. shannoni, l. barrettoi, l. intermedia, l. whitmani, l. lloydi, and l. minasensis. l. intermedia (38.3%) and l. whitmani (38.6%) predominated. l. intermedia predominated in the peridomicile, where it displayed more intense anthropophily, while l. whitmani displayed greater density in the banana plantations and forest, preferential sites for biting humans. studies on seasonality showed that while l. intermedia displayed greater density in the hottest months of the year (december, january, and february), l. whitmani was abundant in the coolest months (june, july, and august), although both occurred throughout the year.
The influence of sugars and amino acids on the blood-feeding behaviour, oviposition and longevity of laboratory colony of Lutzomyia longipalpis (Lutz & Neiva, 1912) (Diptera: Psychodidae, Phlebotominae)
Souza, Nataly A.;Andrade-Coelho, Claudia A.;Barbosa, André F.;Vilela, Mauricio L.;Rangel, Elizabeth F.;Deane, Maria P.;
Memórias do Instituto Oswaldo Cruz , 1995, DOI: 10.1590/S0074-02761995000600017
Abstract: schneider's drosophila medium, a complex amino acid rich medium was tested alone and with seven different sugars for some aspects of the biology of lutzomyia longipalpis. statistically significant results were obtained when sucrose was used alone, indicating that among the sugars tested, this is still the most suitable and practical one for the maintenance of l. longipalpis colonies. however, the addition of schneider's medium to a pool of different sugars, was suggested to be related with the acceptance of the first and second blood meals and to longevity, these being, obviously, quite relevant aspects when tansmission experiments are contemplated.
The sand fly fauna (Diptera: Psychodidae: Phlebotominae) of a focus of cutaneous leishmaniasis in Ilhéus, state of Bahia, Brazil
Azevedo, Alfredo CR;Vilela, Maurício L;Souza, Nataly A;Andrade-Coelho, Claudia A;Barbosa, André F;Firmo, Ant?nio LS;Rangel, Elizabeth F;
Memórias do Instituto Oswaldo Cruz , 1996, DOI: 10.1590/S0074-02761996000100012
Abstract: the municipality of ilhéus, state of bahia, has a focus of cutaneous leishmaniasis where entomological studies were carried out to determine the sand fly species and their habits. lutzomyia migonei, l. sallesi, l. tupynambai, l. schreiberi, l. intermedia, l. whitmani, l. yuilli yuilli, l. fischeri, l. pessoai, l. shannoni and l. misionensis were identified. lutzomyia whitmani was the predominant species. specimens were collected indoors, at peridomestic sites, in the cocoa plantations and in other types of collections. females fed readily on humans and were attracted to domestic animals. our evidence suggests that l. whitmani is a probable vector.
The Phlebotominae sand fly (Diptera: Psychodidae) fauna of two Atlantic Rain Forest Reserves in the State of Rio de Janeiro, Brazil
Souza, Nataly A;Andrade-Coêlho, Claudia A;Vilela, Maurício L;Rangel, Elizabeth F;
Memórias do Instituto Oswaldo Cruz , 2001, DOI: 10.1590/S0074-02762001000300006
Abstract: during two consecutive years, studies on the sand fly fauna in po?o das antas and fazenda bom retiro, two atlantic rain forest reserves from the state of rio de janeiro, were performed using shannon traps, cdc light traps and human bait collections. eleven species were identified; lutzomyia longipalpis, l. migonei, l. edwardsi, l. intermedia, l. whitmani, l. fischeri, l. shannoni, l. ayrozai, l. hirsuta, l. monticola and l. misionensis (first occurrence in the state of rio de janeiro). l. intermedia and l. whitmani were the predominant anthropophilic species around houses, while l. hirsuta predominated in the forest.
Biologia de Lutzomyia intermedia Lutz & Neiva, 1912 e Lutzomyia longypalpis Lutz & Neiva, 1912 (Diptera, Phychodidae), em condi??es experimentais. I. aspectos da alimenta??o de larvas e adultos
Rangel, Elizabeth F.;Souza, Nataly A.;Wermelinger, Eduardo D.;Barbosa, André F.;Andrade, Claudia A.;
Memórias do Instituto Oswaldo Cruz , 1986, DOI: 10.1590/S0074-02761986000400010
Abstract: to improve our knowledge on the breeding and behaviour of sandflies in captivity, we established closed colonies of lutzomyia intermedia and lutzomyia longipalpis. data are here presented on the feeding preferences of larvae and adults and their influence on the development and survival of each species. fish food is accepted by the larvae of both species; it is easily available, unexpensive and does not encourage the growth of fungi. the larvae of both species, in all stages accepted food of vegetal and mixed origin, but the 1st and 2nd stage larvae of l. intermedia preferred vegetal food, while the 3rd and 4th stage larvae of l. longipalpis showed a discreet preference for mixed food. previous feeding on sugar was not necessary to induce a blood meal. both species can feed on man, dog, hamster and bird, but better development was obtained when the females was fed on hamster. the female of l. longipalpis were more resistant to the absence of blood meal than those of l.intermedia, although 70% of both were able to survive on a sugar meal up to seven days.
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