Browsing Artículos Científicos by Title
Now showing items 450-469 of 563
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R-Ras Glucosylation and Transient RhoA Activation Determine the Cytopathic Effect Produced by Toxin B Variants from Toxin A-negative Strains of Clostridium difficile
(Universidad Nacional, Costa Rica, 2003-03)Clostridium difficile induces antibiotic-associated di-arrhea through the production of toxin A and toxin B;the former toxin has been assumed to be responsible forthe symptoms of the disease. Several toxin ... -
R-Ras Glucosylation and transient RhoA activation determine the cytopathic effect produced by Toxin B variants from Toxin A-negative strains of clostridium difficile
(American Society for Biochemistry and Molecular Biology, 2003-03-07)Clostridium difficile induces antibiotic-associated diarrhea through the production of toxin A and toxin B; the former toxin has been assumed to be responsible for the symptoms of the disease. Several toxin A-negative ... -
Range prediction for the Giant Fruit-Eating Bat, Artibeus amplus (Phyllostomidae: Stenodermatinae) in South America
(Taylor & Francis, 2012-05-12)Suitable habitat range for Artibeus amplus in the Neotropics was predicted using maximum entropy niche modeling, environmental covariates, and museum records from 61 locations across Colombia, Venezuela, Guyana, and Suriname. ... -
Re-emergence of Plasmodium malariae in Costa Rica
(Universidad Nacional, Costa Rica, 2015-04-30)In this paper we report the diagnosis of four cases of Plasmodium malariae in humans in Costa Rica, using parasitological and molecular techniques. Real-time PCR detected P. malariae in all four samples and established ... -
Regime shifts and heterogeneous trends in malaria time series from Western Kenya Highlands
(Parasitology, 2011-10)Large malaria epidemics in the East African highlands during the mid and late 1990s kindled a stream of research on the role that global warming might have on malaria transmission. Most of the inferences using temporal ... -
Regulation of Brucella virulence by the two-component system BvrR/BvrS
(Elsevier B.V., 2002-12-20)The Brucella BvrR/BvrS two-component regulatory system is highly similar to the regulatory and sensory proteins of Sinorhizobium and Agrobacterium necessary for endosymbiosis and pathogenicity in plants, and very similar ... -
Relación del estado fisiológico de ovarios de cerdas con la causa del descarte en dos granjas de Costa Rica
(Revista Científica, FCV-LUZ, 2012-03-23)Con el objetivo de determinar la relación de la condición funcio- nal de los ovarios de cerdas con la causa del descarte, se reali- zó un análisis de 260 pares de gónadas de hembras porcinas, provenientes de cerdas de ... -
Relación entre el estado serológico a leucosis bovina enzoótica y parámetros reproductivos en hatos lecheros especializados de Costa Rica
(Universidad Nacional, Costa Rica, 2015-03-04)Se realizó un estudio longitudinal y analítico para determinar la relación entre el estado serológico al virus de la leucosis bovina enzoótica (VLBE) y los parámetros reproductivos, en 26 fincas lecheras de Costa Rica ... -
Reporte de caso clínico Primer diagnóstico de Rhodococcus equi confirmado, laboratorialmente, en un potrillo de Costa Rica
(Universidad Nacional, Costa Rica, 2020-03-09)Neumonía por Rhodococcus equi es importante causa de morbilidad y mortalidad en potrillos de todo el mundo. La prevalencia y/o virulencia de la bacteria es, aparentemente, baja en Costa Rica, pues nunca han sido reportados ... -
Reporte de influenza canina en Costa Rica
(Universidad Nacional, Costa Rica, 2017)Influenza canina causada por H3N8 fue descrita en 2004 en los Estados Unidos en Greyhounds. El agente etiológico es un mutante del virus de la influenza equina, H3N8. Posteriormente se describieron casos de influenza ... -
Reproductive hormonal profile in Eastern Pacific green turtles captured in‐water
(Springer, 2022-06-17)The Eastern Pacifc green turtle (EPGT) has been diferentiating from the green turtle and is currently considered a separate population. This study determined the values of reproductive hormones and total thyroxine of 56 ... -
Response to the experimental inoculation of Sigmodon hispidus (Rodentia: Muridae) with vesicular stomatitis virus, New Jersey serotype
(Universidad Nacional, Costa Rica, 2009)Sigmodon hispidus (cotton rat) was previously found to have antibodies against Vesicular Stomatitis Virus, New Jersey serotype (VSV-NJ) under field conditions in Costa Rica. In order to evaluate their response to the virus ... -
Reticulopericarditis traumática: reporte de un caso
(Universidad Nacional, Costa Rica, 2016)Resumen: La reticulopericarditis traumática es una enfermedad que puede afectar, severamente, a los bovinos, al producir efectos importantes como reducción en su rendimiento general y descarte temprano. La ingestión ... -
Revisión de los aspectos para la evaluación de la nutrición y alimentación en programas de salud de hato de ganado lechero I: evaluación del hato
(Universidad Nacional, Costa Rica, 2017)La alimentación desempeña un rol preponderante en el rendimiento de las vacas lecheras y busca, fundamentalmente, llenar los requerimientos nutricionales de los animales, garantizar la salud y función digestivas, así ... -
Rickettsioses in Latin America, Caribbean, Spain and Portugal
(Revista MVZ Córdoba, 2011-05-10)Data on genus and infectious by Rickettsia were retrospectively compiled from the critical review literature regarding all countries in Latin America, Caribbean islands, Portugal and Spain. We considered all Rickettsia ... -
Rinitis piogranulomatosa asociada a Conidiobolus coronatus en un caballo : reporte de caso.
(Universidad Nacional, Costa Rica, 2016-06-15)Un equino, sin raza definida, hembra, de 6 años de edad, de San Rafael de Alajuela, presentaba disnea y descarga nasal bilateral de aspecto seroso y turbio, asociado a una masa irregular en el septo nasal que obstruía ... -
Rinomicosis causada por Conidiobolus coronatus en un caballo proveniente de Puntarenas, Costa Rica
(Universidad Nacional, Costa Rica, 2012-09-16)Se describe un caso de rinomicosis en un caballo de 8 años procedente de Quepos, Puntarenas, Costa Rica, con historia de epistaxis periódica, secreción mucopurulenta y una masa granulomatosa ulcerativa visible en el ollar ... -
Role of Clostridium perfringens toxins in necrotic enteritis in poultry
(Escuela de Medicina Veterinaria, 2016)Poultry products represent over 30% of animal protein consumption worldwide, and its demand is growing considerably. The current global annual production of poultry meat and eggs is more than 115 million tons and 70 ... -
Rotavirus and coronavirus outbreak: etiology of annual diarrhea in Costa Rican children
(Universidad de Costa Rica, 1997)In Costa Rica, an annual outbreak of infant diarrheal disease (December and January) was reported since 1976, and rotavirus was incriminated 1ater as the main etiological agent (1976-1981). Apparently the disease has not ... -
Rotavirus Genotypes in Costa Rica, Nicaragua, Honduras and the Dominican Republic
(S. Karger AG, Basel, 2010-07-02)In this study, 574 stool samples from children with gastroen- teritis were obtained from different hospitals in Costa Rica, Honduras, Nicaragua and the Dominican Republic during 2005–2006. Diarrhea stool samples ...