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Search Results: 1 - 10 of 28 matches for " Feliciangeli "
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Control de la enfermedad de chagas en Venezuela: Logros pasados y retos presentes
Feliciangeli,M. Dora;
Interciencia , 2009,
Abstract: chagas disease is a "neglected disease" affecting millions of people in latin america. a review is made of the past successes and current challenges of the chagas disease control program in venezuela (pcech), and results of recent research are presented. officially implemented in the decade of 1960 with the aim of interrupting the intra-domestic transmission maintained by rhodnius prolixus, the pcech was mainly based on the large-scale use of insecticide spraying, the construction or improving of rural houses and the introduction of routine screening in public hospital blood banks for trypanosoma cruzi using the elisa test. after four decades, a drastic reduction of the prevalence of infection from 44.5% to 8.9% has been achieved. however, the pressure of house re-infestation by sylvan r. prolixus, and trends of domestication of other sylvan species, such as panstrongylus geniculatus, have given rise to new epidemiological scenarios that pose new challenges. because of this situation, re-examining how best to target monitoring and control efforts on scientific bases is of great urgency. additionally, efforts to improve health education and community participation for a more efficient epidemiological surveillance as well as medical attention to chagas patients, not undertaken in the past, are currently considered as a new and urgent priority of a comprehensive chagas disease control program policy in venezuela.
Taxonomy and distribution of phlebotomine sandflies in Venezuela: II. The subgenus Trichopygomyia of the genus Lutzomyia (Diptera: Psychodidae)
Feliciangeli, M. Dora;
Memórias do Instituto Oswaldo Cruz , 1989, DOI: 10.1590/S0074-02761989000400014
Abstract: species of sandflies in the subgenuys trichopygomyia of the genus lutzomyia occurring in venezuela are reviewd. a new species, lutzomyia pinna n. sp. is described. a distribution map and a pictorial key for maleds are provided with remarks on the ecological data collected in venezuela.
Taxonomy and distribution of phlebotomine sandflies in Venezuela: I. The Oswaldoi species group of the genus Lutzomyia (Diptera: Psychodidae)
Feliciangeli, M. Dora;
Memórias do Instituto Oswaldo Cruz , 1989, DOI: 10.1590/S0074-02761989000300007
Abstract: species of sandflies in the oswaldoi-group of the genus lutzomyia occuring in venezuela are reviewed. a new species, lutzomyia saccai n. sp. is described. a distribution map and pictorial keys for males and females are provided with notes on biological and ecological data collected in venezuela.
Ecology of sandflies Diptera: Psychodidae) in a restricted focus of cutaneous leishmaniasis in Northern Venezuela: IV. Sandfly monthly fluctuation and leishmaniasis incidence relationship
Feliciangeli, M. Dora;
Memórias do Instituto Oswaldo Cruz , 1987, DOI: 10.1590/S0074-02761987000200004
Abstract: an attempt has been made to correlate the monthly incidence of human leishmaniasis with the temporal distribution of sandfly species at san esteban, northern venezuela. upon statistical analysis, the seasonal fluctuation of l. ovallesi population correlated strongly with the human disease, while the dynamics of l. panamensis, generally believed to be the vector in the central area of the country, showed only a very weak correlation. these findings support the hypothesis that l. panamensis might not be the main or unique species responsible for the transmission in this area and that l. ovallesi and additionally l. olmeca bicolor might be involved in the epidemiology of the disease.
Ecology of sandflies (Diptera: Psychodidae) in a restricted focus of cutaneous leishmaniasis en Northern Venezuela: I. Description of the study area, catching methods and species composition
Feliciangeli, M. Dora;
Memórias do Instituto Oswaldo Cruz , 1987, DOI: 10.1590/S0074-02761987000100019
Abstract: a study on the ecology of phlebotomine sandfly fauna in a restricted focus of cutaneous leishmaniasis in northern venezuela was undertaken in order to investigate the species responsible for the transmission. the study area and catching methods for phlebotomine sandflies are described. a total of 9,061 females and 1,662 males were collected during a year-term study. 12 species of lutzomya and 1 species of brumptomya sp. were identified. absolute and relative abundance and ocurrence for each species were determined. the rel ative occurrence allowed to distinguish the common species, viz. l. panamensis, l. ovallesi, l. gomezi, l. tinidadensis, l. atroclavata, l. cayennensis, l. shannoni and l. olmeca bicolor from the rare species vis., l. punctigeniculata, l. rangeliana, l. evansi and l. dubitans. general comments on the species composition of the sandfly fauna in this locality are made.
Taxonomic review of Lutzomyia walkeri (Newstead, 1914) [= Lutzomyia marajoensis (Damasceno & Causey, 1944)] and the resurrection of Lutzomyia dubitans (Sherlock, 1962) (Diptera: Psychodidae)
Feliciangeli, M. Dora;
Memórias do Instituto Oswaldo Cruz , 1985, DOI: 10.1590/S0074-02761985000300006
Abstract: examination of the holotype of lutzomyia marajoensis (damasceno & causey, 1944) shows this species to be identical to lutzomyia walkeri (newstead, 1914). the name lutxomyia dubitans (sherlock, 1962) is resurrected for another sand fly which has been incorrectly named l. marajoensis since 1961. newly discovered structural differences between males and females of l walkeri from l. dubitans are presented.
Ecology of sandflies (Diptera: Psychodidae) in a restricted focus of cutaneous leishmaniasis in Northern Venezuela: III. Seasonal fluctuation
Feliciangeli, M. Dora;
Memórias do Instituto Oswaldo Cruz , 1987, DOI: 10.1590/S0074-02761987000200003
Abstract: a one year-long study (march 1979-march 1980) was carried out at san esteban, an endemic focus of cutaneous leishmaniasis in northern venezuela, with the aim of observing the seasonal fluctuation of the local phlebotomine sandflies species. the influence of climatic factors (temperature, relative humidity and rainfall) on population dynamics was analyzed in three collecting sites - a house, a peridomestic area and a sylvatic region. among anthropophilic species, l. panamensis behaved as a wetseason species, the mean minimum relative humidity being the critical factor influencing the total number of individuals. when the population density of this fly decreased, it was successfully replaced by l. ovallesi, a dry-season species. on the other hand, seasonal variations of l. gomezi were more strongly affected by the temperature.
Ecology of sandflies (Diptera: Psychodidae) in a restricted focus of cutaneous leishmaniasis in Northern Venezuela: II. Species composition in relation to habitat, catching method and hour of catching
Feliciangeli, M. Dora;
Memórias do Instituto Oswaldo Cruz , 1987, DOI: 10.1590/S0074-02761987000100020
Abstract: the ecology of phlebotomine sandflies in an endemic focus of cutaneous leishmaniasis in northern venezuela (san esteban, carabobo state) was investigated through a year-term study. three different habitats: viz. a house, a pridomestic area and a sylvatic area, were covered and the species composition, the abundance and occurrence of each species were analyzed in relation to the habitats, catching methods and hour of catching. l. panamensis, l. gomezi and l. ovallesi are the species which bite man, although almost exclusively at night. all of them hide by day and are common in the sylvatic area. moreover, l. panamensis and l. gomezi successfully approach the house and seem to settle in the peridomestic area. l. shannoni and l. olmeca bicolor also approach and accidentally bite man. l. trinidadensis, l. atroclavata and l. cayennensis are the common non-antrhopophilic species in the area.
Bound on four-dimensional Planck mass
Xavier Calmet,Marco Feliciangeli
Physics , 2008, DOI: 10.1103/PhysRevD.78.067702
Abstract: In this note we derive a bound using data from cosmic rays physics on a model recently proposed to solve the hierarchy problem by lowering the Planck scale to the TeV region without the introduction of extra-dimensions. We show that the non observation of small black holes by AGASA implies a model independent limit for the four-dimensional reduced Planck mass of roughly 488 GeV.
Esculpido exocoriónico del huevo de dos poblaciones de Lutzomyia longipalpis s.l. (Diptera: Psychodidae) de Venezuela
Oviedo,Milagros; Feliciangeli,M. Dora;
Boletín de Malariología y Salud Ambiental , 2007,
Abstract: scanning electron microscope (sem) studies of eggshell morphology have shown that differences between related species of insects are reliable taxonomic markers. in the present study, the eggshell fine structure of two venezuelan populations of lutzomyia longipalpis s.l., vector of american visceral leishmaniasis, was examined by sem. newly laid eggs of l. longipalpis s.l.were obtained from a colony from trujillo state a nd from field females collected in guárico state. the chorionic egg sculpturing of both populations was characterized as a pattern of parallel ridging, but in the population from trujillo the pattern was irregular and the ridges appeared connected, while those from guarico were more regular and no connections were observed. as l. longipalpis s.l. is recognised as a species complex, further studies are needed to compare the chorionic sculpturing of eggs from different populations of l. longipalpis in venezuela and other neotropic countries, including l. pseudolongipalpis, the first described species in the complex, in order to clarify the significance of such differences and the usefulness of the eggshell chorionic sculpturing as a taxonomic tool in the complex.
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