• Two Groups of Cocirculating, Epidemic Clostridiodes difficile Strains Microdiversify through Different Mechanisms 

  Murillo Corrales, Tatiana; Ramírez Vargas, Gabriel; Riedel, Thomas; Overmann, Jörg; Andersen, Joakim M; Guzmán Verri, Caterina; Chaves Olarte, Esteban; Rodríguez Sánchez, César (2018-03)

  Clostridiodes difficile strains from the NAPCR1/ST54 and NAP1/ST01 types have caused outbreaks despite of their notable differences in genome diversity. By comparing whole genome sequences of 32 NAPCR1/ST54 isolates and ...

• Isolates of Clostridium perfringens recovered from Costa Rican patients with antibiotic-associated diarrhoea are mostly enterotoxin-negative and susceptible to first-choice antimicrobials 

  Camacho Matamoros, Natassia; Espinoza Aguirre, Juan Carlos; Rodríguez Sánchez, César; Rodríguez Cavallini, Evelyn (2008-03)

  To assess the prevalence of enterotoxigenic Clostridium perfringens among adults suffering from antibiotic-associated diarrhoea in a Costa Rican hospital, faecal samples were analysed from 104 patients by a cultivation ...

• Demonstration of antibiotic-induced tolerance development in tropical agroecosystems through physiological profiling of sediment microbial communities 

  Arias Andrés, María de Jesús; Ruepert, Clemens; García Santamaría, Fernando; Rodríguez Sánchez, César (2014-01)

  Agricultural use of antibiotics differs quantitatively and qualitatively in tropical and temperate countries. To gain insight into the nature and magnitude of physiological adaptations prompted by these drugs in microbial ...

• Phenotypic identification of over 1000 isolates of anaerobic bacteria recovered between 1999 and 2008 in a major Costa Rican hospital 

  Rodríguez Cavallini, Evelyn; Vargas, Pablo; Rodríguez Sánchez, César; Gamboa Coronado, María del Mar; Quesada Gómez, Carlos (2011-07)

  Because of limitations in infrastructure, the aetiology of infections caused by anaerobic bacteria is seldom determined in clinical laboratories of developing countries. This study reports on the identification of 1010 ...

• Neoadjuvant Metformin Added to Systemic Therapy Increases Pathological Complete Response in Breast Cancer: A Cross-sectional Study, Mexico Hospital, Costa Rica 

  Landaverde Recinos, Denis; Van der Laat M., Alicia; Ramos Esquivel, Allan (2018-02)

  Background: Metformin shows anti-proliferative effect on tumor cells. We studied the effect of metformin on achieving complete pathological response (pCR) in breast cancer patients receiving neoadjuvant therapy in a Latin ...

• Reclamando el 25 de julio como fiesta nacional: Guanacaste y la nación costarricense, 1924-1949 

  Díaz Arias, David (2009-01-01)

  Este trabajo explora cómo se inventó la fiesta del 25 de julio en Costa Rica.

• Fisico-química de las aguas superficiales de la Cuenca del río Rincón, Península de Osa, Costa Rica 

  Beita Sandí, Wilson; Barahona Palomo, Marco (2010-12)

  The Rincon River Basin is characterized by steep and rugged topography with outcrops of recent sediments as well as igneous and sedimentary rocks. The area is mostly covered by forest (Tropical Wet Forest) and agricultural ...

• Hallazgos ultraestructurales en lesiones foliares asociadas a ‘vena roja’ en helecho hoja de cuero* 

  Granados Montero, María del Milagro; Sánchez Chacón, Ethel; Maribelle Vargas Montero; Barboza Aguilar, Cinthya (2014-02)

  La vena roja del helecho hoja de cuero (Rumorah adiantiformis) se cataloga como una enfermedad de etiología desconocida, ya que no se conoce cuál es su agente o factor causal. Ésta alteración, al igual que el síndrome de ...

• Predictive validity of body fat percentage by bioimpedance compared with deuterium oxide dilution in Costa Rican schoolchildren 

  Zamora Alfaro, José Antonio; Laclé Murray, Adriana (2017-06-19)

  OBJECTIVE: The purpose of this study was to verify the validity of body fat percentage (BF%) by bioelectrical impedance analysis (BIA) in a sample of Costa Rican schoolchildren. METHODS: The sample consisted of 52 male ...

• Hacia una revalorización del desarrollo y la función del cine de ficción costarricense 

  Fonseca Hidalgo, José Andrés (2013-12)

  La ponencia da cuenta del avance realizado hasta el momento en mi investigación sobre el uso de la narrativa en los largometrajes de ficción costarricenses de inicios del siglo XXI. Propone una perspectiva renovada para ...

• Acute Hepatic Response to Diet Modification and Exercise-induced Endotoxemia during a Laboratory-based Duathlon 

  Moncada Jiménez, José; Plaisance, Eric Paul; Araya Ramírez, Felipe; Taylor, James K.; Ratcliff, Lance; Mestek, Michael L.; Grandjean, Peter W.; Aragón Vargas, Luis Fernando (2010-01)

  The purpose of the study was to compare the acute hepatic response to diet modification and exercise-induced endotoxemia, and to determine if associations exist between liver damage markers, body core temperature, and ...

• Initial metabolic state and exercise-induced endotoxaemia are unrelated to gastrointestinal symptoms during exercise 

  Moncada Jiménez, José; Plaisance, Eric Paul; Mestek, Michael L.; Araya Ramírez, Felipe; Ratcliff, Lance; Taylor, James K.; Grandjean, Peter W.; Aragón Vargas, Luis Fernando (2009-06)

  The aim of the study was to investigate the association between the initial metabolic state and exercise-induced endotoxaemia on the appearance of gastrointestinal symptoms (GIS) during exer-cise. Eleven males ...

• Seasonal profiles of Aedes aegypti (Diptera: Culicidae) larval habitats in an urban area of Costa Rica with a history of mosquito control 

  Troyo Rodríguez, Adriana; Calderón Arguedas, Ólger; Fuller, Douglas O.; Solano Chinchilla, Mayra Emilia; Avendaño López, Adrián; Arheart, Kristopher L.; Chadee, Dave D.; Beier, John C. (2008-06-01)

  Dengue is the most important arboviral disease worldwide and the principal vector-borne disease in Costa Rica. Control of Aedes aegypti populations through source reduction is still considered the most effective way of ...

• A geographical sampling method for surveys of mosquito larvae in an urban area using high-resolution satellite imagery 

  Troyo Rodríguez, Adriana; Fuller, Douglas O.; Calderón Arguedas, Ólger; Beier, John C. (2008-06-01)

  Entomological surveys in urban areas are often biased by selecting houses or locations with known high vector densities. A sampling strategy was developed for Puntarenas, Costa Rica, using high-resolution satellite imagery. ...

• Ejercicio físico como tratamiento en el manejo de lumbalgia 

  Zamora Salas, Juan Diego; Anchía Hernández, Gabriel (2017)

  La lumbalgia es un padecimiento que conlleva grandes repercusiones económicas, sociales y se ha convertido en una de las primeras causas de incapacidad laboral a nivel global. Cuando ocurre el dolor en la parte baja de la ...

• Age-related differences when walking downhill on different sloped terrains 

  Scaglioni Solano, Pietro; Aragón Vargas, Luis Fernando (2015-01)

  Despite the common situation of walking on different sloped terrains, previous work on gait has focused on level terrain. This study aims to assess whether any age-related differences exist in spatiotemporal and stability ...

• Gait Characteristics and Sensory Abilities of Older Adults are Modulated by Gender 

  Scaglioni Solano, Pietro; Aragón Vargas, Luis Fernando (2015-06)

  Despite the general perception that women and men walk differently, little is known about the reasons for these differences, especially in older adults. Previous work on gender differences in older adults has focused on ...

• Emergence of an Outbreak-Associated Clostridium difficile Variant with Increased Virulence 

  Quesada Gómez, Carlos; López Ureña, Diana; Chaves Olartea, Esteban; Acuña Amador, Luis Alberto; Villalobos Zúñiga, Manuel Antonio; Du, Tim; Freire, Rosemayre; Guzmán Verri, Caterina; Gamboa Coronado, María del Mar; Lawley, Trevor D.; Moreno Robles, Edgardo; Mulvey, Michael R.; de Castro Brito, Gerly Anne; Rodríguez Cavallini, Evelyn; Rodríguez Sánchez, César (2015-04)

  The prevalence of Clostridium difficile infections has increased due to the emergence of epidemic variants from diverse genetic lineages. Here we describe the emergence of a novel variant during an outbreak in a Costa Rican ...

• Inventing Twitter: An iterative approach to new media development 

  Siles González, Ignacio (2013)

  This article analyzes the creation of Twitter by developing an iterative approach that accounts for feedback loops between developers and users, sequences of interaction between these actors over time, and the various ...

• Web technologies of the self: The arising of the "blogger" identity 

  Siles González, Ignacio (2012-07)

  Drawing on Michel Foucault's theories of subjectivity, this paper conceptualizes early blogging and online diary writing as “technologies of the self,” that is, procedures through which practitioners enacted certain ...

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