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Now showing items 8087-8106 of 13279

    • Nematode fauna of Costa Rican protected areas 

      Esquivel Hernández, Alejandro (Universidad Nacional, Costa Rica., 2003-12-01)
      The Instituto Nacional de Biodiversidad (INBio), in collaboration with the Nematology Laborato ry at Universidad Nacional (U.N.A) of Costa Rica, conducted a nematode inventory of Costa Rican wild lands. Hundreds of samples ...

    • Nematodos como indicadores ambientales 

      Alejandro Esquivel Hernández (2013-08-22)
      Los nematodos juegan un papel importante en una serie de procesos ecológicos que son clave para el funcionamiento de los ecosistemas. Una aplicación muy particular, que ha tomado auge en los últimos años, es el uso de la ...

    • Nematology in Central American countries, a general overview of the present situation 

      Chaverri Fonseca, Fabio; Bravo, Virya; Ramírez, Fernando; Berrocal, Silvia; Orozco, Martha; Córdoba, Leonel (50TH ANNUAL MEETING OF NEMATOLOGIST OF TROPICAL AMERICA (ONTA 2018), 2018-08)
      Pesticide use in Central American agriculture has been promoted as an important tool for development since decades, despite in many cases being a hazardous technology for human health and the environment. At the same time ...

    • El neoindigenismo, el género y la identidad en El tiempo principia en Xibalbá, de Luis de Lión 

      Camacho Alfaro, Ana Elena (Universidad Nacional, Costa Rica, 2022)
      Presenta una propuesta de investigación, que consiste en una descripción, análisis e interpretación de la novela El tiempo principia en Xibalbá (1984), del escritor guatemalteco Luis de Lión, que se postula como adscrita ...

    • Neospara caninum 

      Vargas Calvo, Valeria (Universidad Nacional, Costa Rica, 2020-09-05)
      El objetivo de este vídeo es presentar una breve explicación sobre la neosporosis, enfermedad de origen parasitario y su afección en los animales. Se indican sus consecuencias y alteraciones, formas de transmisión, control, ...

    • Neotropical bats from Costa Rica harbour diverse coronaviruses 

      Moreira-Soto, A.; Taylor-Castillo, L.; Vargas-Vargas, N.; Rodríguez-Herrera, B.; Corrales Aguilar, Eugenia; Jiménez Sánchez, Carlos (Blackwell, 2015)
      Bats are hosts of diverse coronaviruses (CoVs) known to potentially cross the host–species barrier. For analysing coronavirus diversity in a bat species-rich country, a total of 421 anal swabs/faecal samples from Costa ...

    • Neotropical bats that co-habit with humans function as dead-end hosts for dengue virus 

      Vicente Santos, Amanda; Moreira Soto, Andres; Soto Garita, Claudio; Chaverri, Luis Guillermo; Chaves, Andrea; Drexler, Jan Felix; Morales, Juan Alberto; Rodríguez Herrera, Bernal; Corrales Aguilar, Eugenia; Alfaro-Alarcon, Alejandro (Public Library of Science (PLOS), 2017-05-18)
      Several studies have shown Dengue Virus (DENV) nucleic acids and/or antibodies present in Neotropical wildlife including bats, suggesting that some bat species may be susceptible to DENV infection. Here we aim to elucidate ...

    • Neotropical dry forest wildlife water hole use and management 

      Vaughan, Christopher; Weis, Kelly (Universidad Nacional, Costa Rica., 1999)
      Selected wildlife species diurnal use of a natural water hole (QO) and an artificial water hole (AW) were studied during 1990 dry season at Guanacaste Conservation Area, Costa Rica. In total, 919 individuals (six marnmal ...

    • Neotropical flowering epiphyte diversity: local composition and geographic affinities 

      Cascante-Marín, Alfredo; Nivia Ruiz, Angela (Universidad Nacional, Costa Rica, 2013)
      Worldwide, the highest diversity of vascular epiphytic plants resides in the Neotropics. The general pattern of taxonomic composition of the neotropical epiphytic flora has been described, but information regarding the ...

    • Nest-specific composition of the trail pheromone of the stingless bee Trigona corvina within populations 

      John, Lena; Aguilar, Ingrid; Ayasse, Manfredo; Jarau, Stefan (Springer, 2012)
      Social insects have evolved highly developed communication systems, enabling them to coordinate complex interactions in their colonies. Pheromones play a major role in the coordination of many tasks. In Trigona corvina, a ...

    • Nestedness patterns of sand fly (Diptera: Psychodidae) species in a neotropical semi-arid environment 

      Chaves, Luis Fernando; Anez, Nestor (Elsevier, 2016)
      A common pattern in neotropical Leishmania spp. transmission is the co-occurrence of several sand fly (SF) species at endemic foci. We collected 13 SF spp. by direct aspiration in natural resting places (NRP) and 10 SF ...

    • Nesting ecology of East Pacific green turtles at Playa Cabuyal, Gulf of Papagayo, Costa Rica 

      Santidrián Tomillo, Pilar; Roberts, Spencer A.; Hernández, Ricardo; Spotila, James R.; Paladino, Frank V, (2014-07)
      East Pacific green turtles (Chelonia mydas), often referred to as black turtles, are smaller and exhibit a lower reproductive output than other populations of green turtles in the Atlantic, Indian and Western Pacific Oceans. ...

    • Neurobrucellosis in stranded dolphins, Costa Rica 

      Hernández-Mora, Gabriela; González-Barrientos, Rocio; Morales, Juan Alberto; Chaves-Olarte, Esteban; Guzman-Verri, Caterina; BARQUERO-CALVO, ELIAS; De-Miguel, María-Jesús; Marín, Clara-María; Blasco, Jose-María; Moreno, Edgardo (Universidad Nacional, Costa Rica, 2008-09)
      Ten striped dolphins, Stenella coeruleoalba, stranded along the Costa Rican Pacifi c coast, had meningoencephalitis and antibodies against Brucella spp. Brucella ceti was isolated from cerebrospinal fl uid of 6 dolphins ...

    • Neuroinvasion of the highly pathogenic influenza virus H7N1 is caused by disruption of the blood brain barrier in an avian model 

      Chaves, Aida J.; Vergara-Alert, Júlia; Busquets, Núria; Valle, Rosa; Rivas, Raquel; Ramis, Antonio; Darji, Ayub; Majo, Natalia (PLOS ONE, 2014-12-15)
      Influenza A virus (IAV) causes central nervous system (CNS) lesions in avian and mammalian species, including humans. However, the mechanism used by IAV to invade the brain has not been determined. In the current work, we ...

    • La neutralización de la versión al inglés de un pasaje de la novela La fugitiva de Sergio Ramírez Mercado 

      Matarrita Brenes, Yadira (Universidad Nacional (Costa Rica). Escuela de Literatura y Ciencias del Lenguaje, 2016)
      Produce un texto meta de la versión al inglés de un pasaje de la novela “La fugitiva” utilizando estrategias de traducción para su neutralización. Los objetivos específicos son: reformular en inglés aspectos sintácticos, ...

    • Neutralización del efceto hemorrágico inducido por veneno Bothrops asper (Serpentes: Viperidae) por extractos de las plantas tropicales 

      Castro, Oscar; Gutiérrez, José María; Barrios, Mariano; Castro, Ian; Romero, Marjorie; Umaña, Eduardo (Universidad Nacional (Costa Rica), 1999)
      Organic extracts representing 48 species included in 30 families of Costa Rican tropical plants were evaluated for their hability to neutralize hemorrhagic acfivity lnduced by the venom of the snake Bothrops aspero Abioassay ...

    • Neutralizing antibodies against vesicular stomatitis viruses (serotypes New Jersey and Indiana) in horses in Costa Rica 

      Blickwede, Maren; Herrero, Marco V.; Tomlinson, Sarah M.; Salman, Mo; Dolz, Gaby (AAVLD, 2002-09-01)
      Serum samples were collected from domestic horses in 4 different regions of Costa Rica to detect antibodies against vesicular stomatitis viruses, serotypes New Jersey (VSV-NJ) and Indiana (VSV-IN). A total of 214 samples ...

    • Neutrophils as Trojan Horse vehicles for Brucella abortus macrophage infection 

      Gutiérrez-Jiménez, Cristina; Mora-Cartín, Ricardo; Altamirano-Silva, Pamela; Chacón-Díaz, Carlos; Chaves-Olarte, Esteban; Moreno, Edgardo; BARQUERO-CALVO, ELIAS (Universidad Nacional, Costa Rica, 2019-05-07)
      Brucella abortus is a stealthy intracellular bacterial pathogen of animals and humans. This bacterium promotes the premature cell death of neutrophils (PMN) and resists the killing action of these leukocytes. B. abortus-infected ...

    • Neutrophils dampen adaptive immunity in Brucellosis 

      Mora-Cartín, Ricardo; Gutiérrez-Jiménez, Cristina; Alfaro-Alarcón, Alejandro; Chaves-Olarte, Esteban; Chacón-Díaz, Carlos; BARQUERO-CALVO, ELIAS; Moreno, Edgardo (American Society For Microbiology, 2019-04-23)
      Brucella organisms are intracellular stealth pathogens of animals and humans. The bacteria overcome the assault of innate immunity at early stages of an infection. Removal of polymorphonuclear neutrophils (PMNs) at the ...

    • Neutrophils exert a suppressive effect on Th1 responses to intracellular pathogen Brucella abortus 

      BARQUERO-CALVO, ELIAS; Martirosyan, Anna; Ordoñez-Rueda, Diana; Arce-Gorvel, Vilma; Alfaro-Alarcón, Alejandro; Lepidi, Hubert; Malissen, Bernard; Malissen, Marie; Gorvel, Jean-Pierre; Moreno, Edgardo (PLoS Pathogens, 2013-02-14)
      Polymorphonuclear neutrophils (PMNs) are the first line of defense against microbial pathogens. In addition to their role in innate immunity, PMNs may also regulate events related to adaptive immunity. To investigate the ...