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Search Results: 1 - 10 of 363973 matches for " Oscar D. Salomón "
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Lutzomyia longipalpis in Clorinda, Formosa province, an area of potential visceral leishmaniasis transmission in Argentina
Salomón, Oscar D;Orellano, Pablo W;
Memórias do Instituto Oswaldo Cruz , 2005, DOI: 10.1590/S0074-02762005000500005
Abstract: phlebotomine captures were performed during 2004 in clorinda, argentina. clorinda is located across the branches of the paraguay river in front of asunción city, paraguay. reports of canine and human visceral leishmaniasis in asunción have been increasing since 1997, however neither leishmaniasis cases nor sand flies were ever recorded from clorinda. light traps were located in migration paths (bridges, port), and peridomestic environments of clorinda and surrounding localities. lutzomyia longipalpis was found in clorinda and puerto pilcomayo, first report in a potential visceral leishmaniasis transmission area for argentina. active surveillance is required immediately in the localities involved and the surrounding area.
Ecological Aspects of Phebotomine (Diptera, Psychodidae) in an Endemic Area of Tegumentary Leishmaniasis in the Northeastern Argentina, 1993-1998
Salomón, Oscar D;Rossi, Gustavo C;Spinelli, Gustavo R;
Memórias do Instituto Oswaldo Cruz , 2002, DOI: 10.1590/S0074-02762002000200003
Abstract: the first epidemic tegumentary leishmaniasis′ outbreak in the province of misiones was recorded in 1998, in the locality of puerto esperanza. phlebotominae collected in the region, previously or simultaneously to the outbreak (september 1993-december 1998) showed that the species lutzomyia intermedia s. l. was prevalent (94%, n 6,150) at all the sites sampled with miniature light trap (10) and shannon trap (3). l. pessoai, l. whitmani, l. migonei, l. shannoni, l. fischeri, l. misionensis, brumptomyia avellari and b. guimaraesi were also captured. sand fly distribution in time and space suggests that in the province of misiones (1) the species already present before 1990 could give rise to the epidemic by the density/dispersion fluctuation of their local populations; (2) the abundance of l. intermedia s. l. was associated with environments with ecotones of primary-secondary vegetation, close to water bodies and with moderate human disturbance; (3) this species showed, towards the end of 1997, peaks of exceptional abundance, subsequent to rainfall peaks in 1996. this increase in abundance of potential vector sand fly populations close to houses with colonizable surroundings could have generated the 1998 epidemic outbreak.
Urban distribution of Phlebotominae in a cutaneous leishmaniasis focus, Argentina
Salomón, Oscar D;Quintana, María G;Zaidenberg, Mario;
Memórias do Instituto Oswaldo Cruz , 2008, DOI: 10.1590/S0074-02762008005000016
Abstract: urbanization and vector domestication are currently proposed as factors that contributed to the recent increase of american cutaneous leishmaniasis (acl). is likely also urban transmission? oran is the main city in the argentinean hyper-endemic area of acl, and human cases in urban residences are usually reported. in order to assess the spatial distribution of risk, phlebotomine traps were located in different environments of oran. a total of 7,787 sand flies were captured: lutzomyia neivai (98.1%), lutzomyia migonei (1.2%), lutzomyia cortelezzii (0.7%), and one lutzomyia shannoni. during the season of transmission (april-may) a single sand fly was obtained in one out of five urban sites, while a trap in a peri-urban pigsty captured up to 2,985 lu. neivai/night. captures performed in the other season of vector activity (september-october) revealed that small-scale changes in the pigsty environment resulted in noticeable changes in the abundance of lu. neivai. in addition, in a new neighbourhood, on the fringe of the city, 1,073 lu. neivai/site were captured in the forested edge but one in the yard of the houses. therefore, in this urban acl focus the human-vector effective contact risk is still associated with peri-urban vegetation and ecotone modifications despite the urban residence of the cases.
Ecological Aspects of Phebotomine (Diptera, Psychodidae) in an Endemic Area of Tegumentary Leishmaniasis in the Northeastern Argentina, 1993-1998
Salomón Oscar D,Rossi Gustavo C,Spinelli Gustavo R
Memórias do Instituto Oswaldo Cruz , 2002,
Abstract: The first epidemic tegumentary leishmaniasis outbreak in the province of Misiones was recorded in 1998, in the locality of Puerto Esperanza. Phlebotominae collected in the region, previously or simultaneously to the outbreak (September 1993-December 1998) showed that the species Lutzomyia intermedia s. l. was prevalent (94%, n 6,150) at all the sites sampled with miniature light trap (10) and Shannon trap (3). L. pessoai, L. whitmani, L. migonei, L. shannoni, L. fischeri, L. misionensis, Brumptomyia avellari and B. guimaraesi were also captured. Sand fly distribution in time and space suggests that in the province of Misiones (1) the species already present before 1990 could give rise to the epidemic by the density/dispersion fluctuation of their local populations; (2) the abundance of L. intermedia s. l. was associated with environments with ecotones of primary-secondary vegetation, close to water bodies and with moderate human disturbance; (3) this species showed, towards the end of 1997, peaks of exceptional abundance, subsequent to rainfall peaks in 1996. This increase in abundance of potential vector sand fly populations close to houses with colonizable surroundings could have generated the 1998 epidemic outbreak.
Nuevos registros de Phlebotominae (Diptera: Psychodidae) para la Argentina New records of Phlebotominae (Diptera: Psychodidae) from Argentina
Oscar D. Salomón,José D. Andrade Filho,María S. Fernández,Juan R. Rosa
Revista de la Sociedad Entomol?3gica Argentina , 2010,
Abstract: La presente nota informa sobre 5 nuevos registros de especies de Phlebotominae para Argentina: Micropygomyia oswaldoi (Mangabeira) y Pintomyia bianchigalatiae (Andrede-Filho, Aguiar, Dias & Falc o) en Iguazú, provincia de Misiones; Psathyromyia lanei (Barretto & Coutinho) en Posadas, Misiones; y Pintomyia torresi (Le Pont & Desjeux) en Nueva Pompeya, provincia de Chaco. Sciopemyia sordellii (Shannon & Del Ponte) y Brumptomyia brumpti (Larrouse), halladas en Iguazú, son nuevas citas para Misiones. The present paper provides 5 new records of phlebotomine sand flies for Argentina: Micropygomyia oswaldoi (Mangabeira) and Pintomyia bianchigalatiae (Andrade Filho, Aguiar, Dias & Falc o), collected in Iguazú, province of Misiones, Psathyromyia lanei (Barretto & Coutinho), from Posadas, Misiones; and Pintomyia torresi (Le Pont & Desjeux), from Nueva Pompeya, province of Chaco. Sciopemyia sordellii (Shannon & Del Ponte), and Brumptomyia brumpti (Larrouse), collected in Iguazú, are new records for the province of Misiones.
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.
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,
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.
Phlebotominae: Vectores de Leishmaniasis en las provincias de Santa Fe y Entre Ríos, Argentina
Salomón,Oscar D.; Mocarbel,Nicolás J.; Pedroni,Elena; Colombo,Javier; Sandillu,Mónica;
Medicina (Buenos Aires) , 2006,
Abstract: the transmission of tegumentary leishmaniasis (tl) has increased in 9 provinces of argentina since 1985. santa fe and entre ríos did not record in this period autochtonous probed cases: however, an epidemic outbreak took place in 2003 in bella vista, corrientes, located in an area with ecological continuity and contiguous to both provinces. in order to evaluate the potential risk of transmission of lt, phlebotominae were captured at locations close to and southern from bella vista during february 2004. the traps located on the shores of parana river in santa fe (el rabón, villa ocampo, cayastá), and entre ríos (la paz. la celina-villa urquiza) captured 860 individuals of lutzomyia neivai (99.5%) and lu. migonei (0.5 %), both species with vectorial capacity for leishmania (v.) braziliensis. in tartagal, santa fe, the captures were consistent with the residual ?chaco? landscape, 7 individuals of lu. nerivai, lu. migonei and lu. cortelezzii. the risk of lt epidemic transmission in these provinces is highlighted, mainly due to the progressive southern tropicalization of the paranaense gallery forest. clinical and entomological surveillance is recommended.
Visceral leishmaniasis in border areas: clustered distribution of phlebotomine sand flies in Clorinda, Argentina
Salomón, Oscar D;Quintana, María G;Bruno, Mario R;Quiriconi, Ricardo V;Cabral, Viviana;
Memórias do Instituto Oswaldo Cruz , 2009, DOI: 10.1590/S0074-02762009000500024
Abstract: three years after the first report of lutzomyia longipalpis in clorinda, argentina, a border city near asunción, paraguay, the city was surveyed again. lu. longipalpis was found clustered in the same neighbourhoods in 2007 as in 2004, even though the scattered distribution of canine visceral leishmaniasis was more related to the traffic of dogs through the border.
Sex pheromone and period gene characterization of Lutzomyia longipalpis sensu lato (Lutz & Neiva) (Diptera: Psychodidae) from Posadas, Argentina
Salomón, Oscar D;Araki, Alejandra S;Hamilton, James GC;Acardi, Soraya A;Peixoto, Alexandre A;
Memórias do Instituto Oswaldo Cruz , 2010, DOI: 10.1590/S0074-02762010000700016
Abstract: lutzomyia longipalpis s.l. is the primary vector of leishmania (l.) infantum in the new world. in this study, male lutzomyia longipalpis specimens from posadas, argentina were characterized for two polymorphic markers: the male sex pheromone and the period (per) gene. the male sex pheromone was identified as (s)-9-methylgermacrene-b, the same compound produced by lu. longipalpis from paraguay and many populations from brazil. the analysis of per gene sequences revealed that the population from argentina is significantly differentiated from previously studied brazilian populations. marker studies could contribute to the understanding of the distribution and spread of urban american visceral leishmaniasis, thus aiding in the design of regional surveillance and control strategies.
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