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Search Results: 1 - 10 of 413 matches for " lutzomyia "
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Correlation of male genital filaments and female spermathecal ducts in New World sand flies of the Lutzomyia intermedia species complex (Diptera: Psychodidae, Phlebotominae)
Marcondes, Carlos Brisola;Alexander, Bruce;
Memórias do Instituto Oswaldo Cruz , 2003, DOI: 10.1590/S0074-02762003000500005
Abstract: the lengths of the male genital filaments and female spermathecal ducts were measured in phlebotomine sand flies of the lutzomyia intermedia species complex and the ratios between these characters calculated. ratios for l. intermedia s. s. from northeast vs southeast brazil (espírito santo and minas gerais), espírito santo/minas gerais vs rio de janeiro/s?o paulo and l. intermedia vs l. neivai were significantly different at p < 0.1, 0.05 and 0.01 respectively when compared using anova. the spermathecal ducts and genital filaments of l. intermedia were significantly longer than those of l. neivai (p < 0.01) and could be used to differentiate these species. the taxonomic and biological significance of these differences is discussed.
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.
Sand flies of Nicaragua: a checklist and reports of new collections
Raymond, Russell W;McHugh, Chad P;Kerr, Sara F;
Memórias do Instituto Oswaldo Cruz , 2010, DOI: 10.1590/S0074-02762010000700008
Abstract: sand flies within the genus lutzomyia serve as the vectors for all species of the protozoan parasite leishmania in the new world. in this paper, we present a summary of the 29 species of lutzomyia and one of brumptomyia previously reported for nicaragua and report results of our recent collections of 565 sand flies at eight localities in the country from 2001-2006. lutzomyia longipalpis was the predominant species collected within the pacific plains region of western nicaragua, while lutzomyia cruciata or lutzomyia barrettoi majuscula were the species most frequently collected in the central highlands and atlantic plains regions. the collection of lutzomyia durani (vargas & nájera) at san jacinto in july 2001 is a new record for nicaragua. leishmaniasis is endemic to nicaragua and occurs in three forms: cutaneous, mucocutaneous and visceral leishmaniasis. cutaneous infections are the most prevalent type of leishmaniasis in nicaragua and they occur in two different clinical manifestations, typical cutaneous leishmaniasis and atypical cutaneous leishmaniasis, depending on the species of the infecting leishmania parasite. the distribution of sand flies collected during this study in relation to the geographic distribution of clinical forms of leishmaniasis in the country is also discussed.
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.
Aislamiento reproductivo asimétrico entre Lutzomyia pseudolongipalpis y Lutzomyia longipalpis (especie C2), vectores neotropicales de leishmaniasis visceral (Diptera: Pshychodidae)
Arrivillaga,Jazzmin; Salerno,Patricia; Rangel,Yadira;
Revista de Biología Tropical , 2009,
Abstract: asymmetric reproductive isolation between lutzomyia pseudolongipalpis and lutzomyia longipalpis (species c2), neotropical vectors of visceral leishmaniasis (diptera: pshychodidae). lutzomyia pseudolongipalpis and lutzomyia longipalpis (species c2, l. sp n.) are two endemic species of phlebotominae sand fly vectors from venezuela. the two insects are sympatric and monophyletic but have deeply diverging, morphological differences. they belong to the l. longipalpis complex. a study of their reproductive isolation is necessary to understand the process of speciation and maintenance of the two sister species as two discrete taxonomic and biological entities. cross-mating tests were conducted (homo and hetero-specific) and monitored under two criteria: biological (presence of copulation and offspring) and genetic (using two isozymic markers diagnostic for the l. longipalpis complex; enzyme diagnosis ak and hk). results indicate reproductive isolation, with an asymmetrical genetic exchange in a direction of hybridization between the two species under experimental conditions, and production of a low number of heterozygotes. these findings support the existence of negative selection on hybrids, and explain the absence of hybrids under natural conditions, in the sympatric locality. rev. biol. trop. 57 (1-2): 23-31. epub 2009 june 30.
Anomalías morfológicas en diferentes estructuras de cinco especies de Lutzomyia (Diptera: Psychodidae) Morphological abnormalities in different structures of five species of Lutzomyia (Diptera: Psychodidae)
Daniela Vergara,Eduar Elías Bejarano,Iván Darío Vélez
Revista de la Sociedad Entomol?3gica Argentina , 2008,
Abstract: Se describen e ilustran diversos casos de anomalías morfológicas de cinco diferentes especies de Lutzomyia Fran a (Diptera Psychodidae). Estas teratologías se observan en varias estructuras importantes para la identificación taxonómica de dichas especies. Los diferentes individuos pertenecientes a las especies L. columbiana, L. hartmanni, L. reburra, L. ayrozai y L. panamensis fueron capturados en diversos departamentos en Colombia. Diverse morphological anomalies in five different species of Lutzomyia Fran a (Diptera: Pychodidae) are described and illustrated. These theratologies are observed in various structures important for the taxonomic identification of the species. The different individuals that belong to the species L. columbiana, L. hartmanni, L. reburra, L. ayrozai and L. panamensis were captured in diverse departments in Colombia.
Correlation of male genital filaments and female spermathecal ducts in New World sand flies of the Lutzomyia intermedia species complex (Diptera: Psychodidae, Phlebotominae)
Marcondes Carlos Brisola,Alexander Bruce
Memórias do Instituto Oswaldo Cruz , 2003,
Abstract: The lengths of the male genital filaments and female spermathecal ducts were measured in phlebotomine sand flies of the Lutzomyia intermedia species complex and the ratios between these characters calculated. Ratios for L. intermedia s. s. from Northeast vs Southeast Brazil (Espírito Santo and Minas Gerais), Espírito Santo/Minas Gerais vs Rio de Janeiro/S o Paulo and L. intermedia vs L. neivai were significantly different at P < 0.1, 0.05 and 0.01 respectively when compared using ANOVA. The spermathecal ducts and genital filaments of L. intermedia were significantly longer than those of L. neivai (P < 0.01) and could be used to differentiate these species. The taxonomic and biological significance of these differences is discussed.
Sand flies fauna involved in the transmission of cutaneous leishmaniasis in Afro-Colombian and Amerindian communities of Choco, Pacific Coast of Colombia
Duque, Patricia;Vélez, Ivan D.;Morales, Marcela;Sierra, Diana;
Neotropical Entomology , 2004, DOI: 10.1590/S1519-566X2004000200018
Abstract: a prospective study was conducted on the diversity of phlebotomine in the pacific coast of colombia and its relationship with the eco-epidemiology of leishmaniasis. a total of 5,365 phlebotomines were collected on light traps, in human baits also standing still on walls, trees and mammalian caves. in total, 42 phlebotomine species were identified belonging to the genera lutzomyia, brumptomyia and warileya. among these, the highly anthropophilic vector species lutzomyia gomezi (nitzulescu), lu. hartmanni (fairchild & hertig) and lu. trapidoi (fairchild & hertig). leishmania panamensis was the main parasite species affecting the population, with a prevalence of 57% in indians and 26% in black people. in the indian community no difference was found in the skin test (montenegro) between sexes, being positive in 57% of indian males and 58.5% in indian females. in contrast, 39% of black males and 10% black females were found to be positive in the skin test. these results confirm that the transmission of l. panamensis in the studied area is restricted to the rural areas and linked to people activities and the location of their homes.
Sand flies (Diptera: Psychodidae) in a cerrado area of the Maranh?o state, Brazil
Silva, Francinaldo S;Carvalho, Luis P C de;Cardozo, Francisco P;Moraes, Jorge L P;Rebêlo, José M M;
Neotropical Entomology , 2010, DOI: 10.1590/S1519-566X2010000600028
Abstract: the present paper aims to increase the knowledge on the sand fly fauna in the cerrado areas of maranh?o state in urban, rural and forest environments. the research was carried out from october 2007 to september 2008, between 18:00h and 06:00h, in the municipality of chapadinha, northeast maranh?o. for insect sampling, cdc light traps were set up in peridomicile and domicile areas of urban and rural zones as well as in cerrado and gallery forests. the total of 1,401 specimens belonging to 17 species were sampled, all within the genus lutzomyia. lutzomyia longipalpis (lutz & neiva) (52.5%), lu. evandroi (costa lima & antunes) (18.3%), lu. whitmani (antunes & coutinho) (12.1%), lu. lenti (mangabeira) (4.7%) and lu. termitophila (martins, falc?o & silva) (4.0%) were the most frequently collected. from an epidemiological viewpoint, five from all of the collected species are vectors of leishmaniasis: lu. longipalpis, lu. whitmani, lu. flaviscutellata (mangabeira), lu. gomezi (nitzulescu) and lu. chagasi (costa lima). lutzomyia chagasi was registered for the first time in maranh?o state and lu. saulensis (floch & abonnenc), lu. monstruosa (floch & abonnenc) and lu. gomezi were found for the first time in the eastern part of the state, since they had been reported only in the amazonian region of maranh?o. regarding to the studied environments, the urban chicken house had the highest number of specimens collected (801), while the gallery forest was the most diverse (15 species). this study demonstrates that the northeast cerrado exhibits a mixed sand fly fauna characterized by an extremely important species vectors assortment involved in the epidemiological cycle of leishmaniasis in maranh?o state.
A First Record of Phlebotominae from Argentinean Patagonia (Diptera: Psychodidae: Phlebotominae)
Muzón, Javier;Spinelli, Gustavo R;Salomón, Oscar D;Rossi, Gustavo C;
Memórias do Instituto Oswaldo Cruz , 2002, DOI: 10.1590/S0074-02762002000600008
Abstract: a species of the lutzomyia oswaldoi group is recorded from the valcheta stream basin, somuncura plateau, patagonia. it represents the world southermost record of a species of phlebotominae, apparently supporting the hypothesis about the relictual character of several components of the somuncura plateau biota, particularly for those species belonging to the paranaense lineages.
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