34 research outputs found

    The molecular phylogenetics of the genus Oligoryzomys (Rodentia: Cricetidae) clarifies rodent host-Hantavirus associations

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    Several species of the genus Oligoryzomys are natural hosts of different hantavirus genotypes affecting humans. The systematics of the genus is confusing, which complicates the identification of the rodent host and hence the potential endemic areas of hantavirus pulmonary syndrome. In this study, we analyse molecular data to infer phylogenetic relationships among Central and South American specimens of Oligoryzomys, and compare our results with previously published data on karyotypic, geographic distribution and host鈥搗irus associations to solve contradictory taxonomic reports. We identified 25 clades, each one corresponding to a different putative species. The phylogenetic trees show that Oligoryzomys longicaudatus is strongly related to the Oligoryzomys flavescens complex, which comprises four clades; Oligoryzomys nigripes is related to Oligoryzomys stramineus, Oligoryzomys vegetus is related to Oligoryzomys fulvescens from Central America, and Oligoryzomys brendae is the sister species of Oligoryzomys aff. destructor. We identified the following rodent host鈥揾antavirus genotype relationships: O.鈥塴ongicaudatus鈥揂ndes; O.鈥塮lavescens 鈥榃est'鈥揃ermejo; O.鈥塮lavescens 鈥楨ast'鈥揕echiguanas; O.鈥塶igripes鈥揓uquitiba; Oligoryzomys microtis鈥揜io Mamore and Rio Mamore-3; Oligoryzomys chacoensis鈥揙ran; Oligoryzomys costaricencis鈥揅hoclo; Oligoryzomys delicatus鈥揗aporal; Oligoryzomys utiaritensis鈥揅astelo dos Sonhos; Oligoryzomys鈥塻p. RT2012鈥揜io Mamore-4; Oligoryzomys鈥塻p. (and not Oligoryzomys fornesi)鈥揂najatuba. This work, besides contributing to the development of prevention programmes for hantavirus epidemiology in Latin America, represents a comprehensive update of the systematics of the genus Oligoryzomys.Fil: Gonz谩lez Ittig, Ra煤l Enrique. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Cordoba. Instituto de Diversidad y Ecologia Animal; ArgentinaFil: Rivera, Paula Cecilia. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Cordoba. Instituto de Diversidad y Ecologia Animal; ArgentinaFil: Levis, Silvana C.. Direccion Nacional de Instituto de Investigacion. Adm.nacional de Laboratorio E Instituto de Salud "dr.c.g.malbran". Instituto Nacional de Enfermedades Virales Humanas; ArgentinaFil: Calder贸n, Gladys E.. Direccion Nacional de Instituto de Investigacion. Adm.nacional de Laboratorio E Instituto de Salud "dr.c.g.malbran". Instituto Nacional de Enfermedades Virales Humanas; ArgentinaFil: Gardenal, Cristina Noemi. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Cordoba. Instituto de Diversidad y Ecologia Animal; Argentin

    B[e] Stars with Warm Dust: Revealing the Nature of Unclassified B[e] Stars and Expanding the Family

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    Until recently, unclassified B[e] stars represented half of the entire B[e] group. Our study of these objects with strong emission-line spectra and IRAS fluxes, decreasing toward longer wavelengths, resulted in a suggestion that they currently form dust in their envelopes. The objects have been tentatively called B[e] stars with warm dust (B[e]WD). Their luminosity range (?3 orders of magnitude) is much larger compared to previous suggestions that dust formation occurs only near very luminous hot stars. A significant fraction of B[e]WD are recognized or suspected binaries. The group has been expanded with both previously detected hot emission-line stars with IR fluxes, typical for confirmed B[e]WD, and new candidates, found in recent all-sky surveys. Currently the number of B[e]WD members and candidates is ?60 with an opportunity to find more in existing stellar catalogs. Main observational and physical properties of B[e]WD and their envelopes are summarized. Our results on newly found group members are presented. Partially based on observations obtained at the Canada-France-Hawaii Telescope (CFHT).Fil: Miroshnichenko, A. S.. University of North Carolina at Greensboro; Estados UnidosFil: Bernabei, S.. Istituto Nazionale di Astrofisica; ItaliaFil: Bjorkman, K. S.. University Of Toledo (utoledo); Estados UnidosFil: Chentsov, E. L.. Russian Academy of Sciences; RusiaFil: Klochkova, V. G.. Russian Academy of Sciences; RusiaFil: Gray, R. O.. Appalachian State University; Estados UnidosFil: Levato, H.. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas. Centro Cient铆fico Tecnol贸gico Conicet - San Juan. Complejo Astron贸mico "El Leoncito". Universidad Nacional de C贸rdoba. Complejo Astron贸mico "El Leoncito". Universidad Nacional de la Plata. Complejo Astron贸mico "El Leoncito". Universidad Nacional de San Juan. Complejo Astron贸mico "El Leoncito"; ArgentinaFil: Grosso, Monica Gladys. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas. Centro Cient铆fico Tecnol贸gico Conicet - San Juan. Instituto de Ciencias Astron贸micas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astron贸micas, de la Tierra y del Espacio; ArgentinaFil: Hinkle, K. H.. National Optical Astronomy Observatory; Estados UnidosFil: Kuratov, K. S.. Fesenkov Astrophysical Institute; Kazajist谩nFil: Kusakin, A. V.. Universitetskij pr; RusiaFil: Garc铆a Lario, P.. European Space Astronomy Centre; Espa帽aFil: Perea Calder贸n, J. V.. European Space Astronomy Centre; Espa帽aFil: Polcaro, V. F.. Istituto di Astrofisica Spaziale e Fisica Cosmica; ItaliaFil: Viotti, R. F.. Istituto di Astrofisica Spaziale e Fisica Cosmica; ItaliaFil: Norci, L.. Dublin City University; IrlandaFil: Manset, N.. Canada France Hawaii Telescope; Estados UnidosFil: Men鈥檚hchikov, A. B.. Saint Mary鈥檚 University; Canad谩Fil: Rudy, R. J.. The Aerospace Corporation; Estados UnidosFil: Lynch, D. K.. The Aerospace Corporation; Estados UnidosFil: Venturini, C. C.. The Aerospace Corporation; Estados UnidosFil: Mazuk, S.. The Aerospace Corporation; Estados UnidosFil: Puetter, R. C.. University of California; Estados UnidosFil: Perry, R. B.. National Aeronautics and Space Administration; Estados UnidosFil: Gandet, T. L.. Lizard Hollow Observatory; Estados Unido

    Detection of the mosquito-borne flaviviruses, West Nile, Dengue, Saint Louis Encephalitis, Ilheus, Bussuquara, and Yellow Fever in free-ranging black howlers (Alouatta caraya) of Northeastern Argentina

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    Several medically important mosquito-borne flaviviruses have been detected in Argentina in recent years: Dengue (DENV), St. Louis encephalitis (SLEV), West Nile (WNV) and Yellow Fever (YFV) viruses. Evidence of Bussuquara virus (BSQV) and Ilheus virus (ILHV) activity were found, but they have not been associated with human disease. Non-human primates can act as important hosts in the natural cycle of flaviviruses and serological studies can lead to improved understanding of virus circulation dynamics and host susceptibility. From July鈥揂ugust 2010, we conducted serological and molecular surveys in free鈥搑anging black howlers (Alouatta caraya) captured in northeastern Argentina. We used 90% plaque-reduction neutralization tests (PRNT90) to analyze 108 serum samples for antibodies to WNV, SLEV, YFV, DENV (serotypes 1and 3), ILHV, and BSQV. Virus genome detection was performed using generic reverse transcription (RT)-nested PCR to identify flaviviruses in 51 antibody-negative animals. Seventy animals had antibodies for one or more flaviviruses for a total antibody prevalence of 64.8% (70/108). Monotypic (13/70, 19%) and heterotypic (27/70, 39%) patterns were differentiated. Specific neutralizing antibodies against WNV, SLEV, DENV-1, DENV-3, ILHV, and BSQV were found. Unexpectedly, the highest flavivirus antibody prevalence detected was to WNV with 9 (8.33%) monotypic responses. All samples tested by (RT)-nested PCR were negative for viral genome. This is the first detection of WNV-specific antibodies in black howlers from Argentina and the first report in free-ranging non-human primates from Latin-American countries. Given that no animals had specific neutralizing antibodies to YFV, our results suggest that the study population remains susceptible to YFV. Monitoring of these agents should be strengthened to detect the establishment of sylvatic cycles of flaviviruses in America and evaluate risks to wildlife and human health.Fil: Morales, Maria Alejandra. Direcci贸n Nacional de Instituto de Investigaci贸n. Administraci贸n Nacional de Laboratorio e Instituto de Salud "Dr. C. G. Malbran". Instituto Nacional de Enfermedades Virales Humanas; ArgentinaFil: Fabbri, Cintia M.. Direcci贸n Nacional de Instituto de Investigaci贸n. Administraci贸n Nacional de Laboratorio e Instituto de Salud "Dr. C. G. Malbran". Instituto Nacional de Enfermedades Virales Humanas; ArgentinaFil: Zunino, Gabriel Eduardo. Universidad Nacional de General Sarmiento. Instituto del Conurbano; Argentina. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas; ArgentinaFil: Kowalewski, Miguel Martin. Consejo Nacional de Investigaciones Cient铆ficas y T茅cnicas. Oficina de Coordinaci贸n Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia". Estaci贸n Biol贸gica de Usos M煤ltiples (Sede Corrientes); ArgentinaFil: Luppo, Victoria C.. Direcci贸n Nacional de Instituto de Investigaci贸n. Administraci贸n Nacional de Laboratorio e Instituto de Salud "Dr. C. G. Malbran". Instituto Nacional de Enfermedades Virales Humanas; ArgentinaFil: Enr铆a, Delia A.. Direcci贸n Nacional de Instituto de Investigaci贸n. Administraci贸n Nacional de Laboratorio e Instituto de Salud "Dr. C. G. Malbran". Instituto Nacional de Enfermedades Virales Humanas; ArgentinaFil: Levis, Silvana C.. Direcci贸n Nacional de Instituto de Investigaci贸n. Administraci贸n Nacional de Laboratorio e Instituto de Salud "Dr. C. G. Malbran". Instituto Nacional de Enfermedades Virales Humanas; ArgentinaFil: Calder贸n, Gladys Ethel. Direcci贸n Nacional de Instituto de Investigaci贸n. Administraci贸n Nacional de Laboratorio e Instituto de Salud "Dr. C. G. Malbran". Instituto Nacional de Enfermedades Virales Humanas; Argentin

    Fabricaci贸n y ensayo de paneles solares para uso espacial : M贸dulo de ingenier铆a para la misi贸n Aquarius/SAC-D

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    El proyecto de desarrollo de paneles solares para misiones satelitales argentinas en ejecuci贸n en la Comisi贸n Nacional de Energ铆a At贸mica (CNEA) se lleva a cabo en el marco de la cooperaci贸n entre esta instituci贸n y la Comisi贸n Nacional de Actividades Espaciales. En este trabajo se presentan los avances logrados durante el 煤ltimo a帽o, los cuales dieron lugar a la fabricaci贸n y ensayo de un segundo panel de ingenier铆a. Este m贸dulo se desarroll贸, en especial, para calificar los nuevos procesos con vistas a la integraci贸n de los paneles solares para la misi贸n Aquarius/SAC-D, la cual es una misi贸n conjunta entre la CONAE y el Goddard Space Flight Center (GSFC) y el Jet Propulsion Laboratory (JPL), ambos de la NASA.The development in the National Atomic Energy Commission (CNEA) of solar arrays for Argentine space missions is being performed within the frame of a cooperation agreement between this agency and the National Commission for Space Activities (CONAE). In this paper, the advances achieved during the last year are presented. These advances conducted to the integration and testing of the second engineering module, which has been specially developed for the qualification of processes for the Aquarius/SAC-D mission. This mission is the result of a cooperation between CONAE and two laboratories from NASA: the Goddard Space Flight Center (GSFC) and the Jet Propulsion Laboratory (JPL).Asociaci贸n Argentina de Energ铆as Renovables y Medio Ambiente (ASADES

    Fabricaci贸n y ensayo de paneles solares para uso espacial : M贸dulo de ingenier铆a para la misi贸n Aquarius/SAC-D

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    El proyecto de desarrollo de paneles solares para misiones satelitales argentinas en ejecuci贸n en la Comisi贸n Nacional de Energ铆a At贸mica (CNEA) se lleva a cabo en el marco de la cooperaci贸n entre esta instituci贸n y la Comisi贸n Nacional de Actividades Espaciales. En este trabajo se presentan los avances logrados durante el 煤ltimo a帽o, los cuales dieron lugar a la fabricaci贸n y ensayo de un segundo panel de ingenier铆a. Este m贸dulo se desarroll贸, en especial, para calificar los nuevos procesos con vistas a la integraci贸n de los paneles solares para la misi贸n Aquarius/SAC-D, la cual es una misi贸n conjunta entre la CONAE y el Goddard Space Flight Center (GSFC) y el Jet Propulsion Laboratory (JPL), ambos de la NASA.The development in the National Atomic Energy Commission (CNEA) of solar arrays for Argentine space missions is being performed within the frame of a cooperation agreement between this agency and the National Commission for Space Activities (CONAE). In this paper, the advances achieved during the last year are presented. These advances conducted to the integration and testing of the second engineering module, which has been specially developed for the qualification of processes for the Aquarius/SAC-D mission. This mission is the result of a cooperation between CONAE and two laboratories from NASA: the Goddard Space Flight Center (GSFC) and the Jet Propulsion Laboratory (JPL).Asociaci贸n Argentina de Energ铆as Renovables y Medio Ambiente (ASADES

    Fabricaci贸n y ensayo de paneles solares para uso espacial : M贸dulo de ingenier铆a para la misi贸n Aquarius/SAC-D

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    El proyecto de desarrollo de paneles solares para misiones satelitales argentinas en ejecuci贸n en la Comisi贸n Nacional de Energ铆a At贸mica (CNEA) se lleva a cabo en el marco de la cooperaci贸n entre esta instituci贸n y la Comisi贸n Nacional de Actividades Espaciales. En este trabajo se presentan los avances logrados durante el 煤ltimo a帽o, los cuales dieron lugar a la fabricaci贸n y ensayo de un segundo panel de ingenier铆a. Este m贸dulo se desarroll贸, en especial, para calificar los nuevos procesos con vistas a la integraci贸n de los paneles solares para la misi贸n Aquarius/SAC-D, la cual es una misi贸n conjunta entre la CONAE y el Goddard Space Flight Center (GSFC) y el Jet Propulsion Laboratory (JPL), ambos de la NASA.The development in the National Atomic Energy Commission (CNEA) of solar arrays for Argentine space missions is being performed within the frame of a cooperation agreement between this agency and the National Commission for Space Activities (CONAE). In this paper, the advances achieved during the last year are presented. These advances conducted to the integration and testing of the second engineering module, which has been specially developed for the qualification of processes for the Aquarius/SAC-D mission. This mission is the result of a cooperation between CONAE and two laboratories from NASA: the Goddard Space Flight Center (GSFC) and the Jet Propulsion Laboratory (JPL).Asociaci贸n Argentina de Energ铆as Renovables y Medio Ambiente (ASADES

    Integraci贸n y ensayos de los paneles solares de vuelo para la misi贸n satelital Aquarius/SAC-D

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    Se desarrollaron los paneles solares para la misi贸n satelital Aquarius/SAC-D en el marco de un contrato de asistencia tecnol贸gica entre la Comisi贸n Nacional de Energ铆a At贸mica (CNEA) y la Comisi贸n Nacional de Actividades Espaciales (CONAE). El modelo de vuelo consta de 2 paneles solares, de 2338 mm 脳 2154 mm cada uno, y fue integrado utilizando celdas solares de triple juntura provistas por Emcore, utilizando procedimientos previamente calificados. Los paneles cuentan, adem谩s, con doce sensores de posici贸n dise帽ados y elaborados en la CNEA. El contenedor para el transporte de los paneles fue tambi茅n desarrollado en la CNEA. Los paneles solares pasaron exitosamente los ensayos ambientales de aceptaci贸n realizados recientemente en el Laborat贸rio de Integra莽茫o e Testes (LIT) del Instituto Nacional de Pesquisas Espaciais (INPE), en Brasil.The solar array for Aquarius/SAC-D satellite mission was developed within the frame of a contract between the National Atomic Energy Commission (CNEA) and the National Commission for Space Activities (CONAE). The flight model has 2 solar panels, 2338 mm 脳 2154 mm each, and has been integrated with advanced triple junction solar cells, from Emcore, using procedures previously qualified. The panels have 12 coarse solar sensors designed and manufactured at CNEA. The container for transport has also been developed at CNEA. The flight model solar array has succesfully withdstand the acceptance environmental test recently performed at Laborat贸rio de Integra莽茫o e Testes (LIT) of the Instituto Nacional de Pesquisas Espaciais (INPE), Brazil.Asociaci贸n Argentina de Energ铆as Renovables y Medio Ambiente (ASADES

    Integraci贸n y ensayos de los paneles solares de vuelo para la misi贸n satelital Aquarius/SAC-D

    Get PDF
    Se desarrollaron los paneles solares para la misi贸n satelital Aquarius/SAC-D en el marco de un contrato de asistencia tecnol贸gica entre la Comisi贸n Nacional de Energ铆a At贸mica (CNEA) y la Comisi贸n Nacional de Actividades Espaciales (CONAE). El modelo de vuelo consta de 2 paneles solares, de 2338 mm 脳 2154 mm cada uno, y fue integrado utilizando celdas solares de triple juntura provistas por Emcore, utilizando procedimientos previamente calificados. Los paneles cuentan, adem谩s, con doce sensores de posici贸n dise帽ados y elaborados en la CNEA. El contenedor para el transporte de los paneles fue tambi茅n desarrollado en la CNEA. Los paneles solares pasaron exitosamente los ensayos ambientales de aceptaci贸n realizados recientemente en el Laborat贸rio de Integra莽茫o e Testes (LIT) del Instituto Nacional de Pesquisas Espaciais (INPE), en Brasil.The solar array for Aquarius/SAC-D satellite mission was developed within the frame of a contract between the National Atomic Energy Commission (CNEA) and the National Commission for Space Activities (CONAE). The flight model has 2 solar panels, 2338 mm 脳 2154 mm each, and has been integrated with advanced triple junction solar cells, from Emcore, using procedures previously qualified. The panels have 12 coarse solar sensors designed and manufactured at CNEA. The container for transport has also been developed at CNEA. The flight model solar array has succesfully withdstand the acceptance environmental test recently performed at Laborat贸rio de Integra莽茫o e Testes (LIT) of the Instituto Nacional de Pesquisas Espaciais (INPE), Brazil.Asociaci贸n Argentina de Energ铆as Renovables y Medio Ambiente (ASADES

    Integraci贸n y ensayos de los paneles solares de vuelo para la misi贸n satelital Aquarius/SAC-D

    Get PDF
    Se desarrollaron los paneles solares para la misi贸n satelital Aquarius/SAC-D en el marco de un contrato de asistencia tecnol贸gica entre la Comisi贸n Nacional de Energ铆a At贸mica (CNEA) y la Comisi贸n Nacional de Actividades Espaciales (CONAE). El modelo de vuelo consta de 2 paneles solares, de 2338 mm 脳 2154 mm cada uno, y fue integrado utilizando celdas solares de triple juntura provistas por Emcore, utilizando procedimientos previamente calificados. Los paneles cuentan, adem谩s, con doce sensores de posici贸n dise帽ados y elaborados en la CNEA. El contenedor para el transporte de los paneles fue tambi茅n desarrollado en la CNEA. Los paneles solares pasaron exitosamente los ensayos ambientales de aceptaci贸n realizados recientemente en el Laborat贸rio de Integra莽茫o e Testes (LIT) del Instituto Nacional de Pesquisas Espaciais (INPE), en Brasil.The solar array for Aquarius/SAC-D satellite mission was developed within the frame of a contract between the National Atomic Energy Commission (CNEA) and the National Commission for Space Activities (CONAE). The flight model has 2 solar panels, 2338 mm 脳 2154 mm each, and has been integrated with advanced triple junction solar cells, from Emcore, using procedures previously qualified. The panels have 12 coarse solar sensors designed and manufactured at CNEA. The container for transport has also been developed at CNEA. The flight model solar array has succesfully withdstand the acceptance environmental test recently performed at Laborat贸rio de Integra莽茫o e Testes (LIT) of the Instituto Nacional de Pesquisas Espaciais (INPE), Brazil.Asociaci贸n Argentina de Energ铆as Renovables y Medio Ambiente (ASADES
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