• Distribución del psílido asiático de los cítricos (Diaphorina citri Kuwayama) en Costa Rica 

  Villalobos Muller, William; Godoy Cabrera, Ivania Carolina (2007-08)

  El insecto plaga Diaphorina citri es vector de la enfermedad de los cítricos conocida como “Huanglongbing”. Esta enfermedad, causada por una bacteria limitada al floema, llamada Candidatus Liberibacter, es de gran importancia ...

• Ant–Aphid Relations in Costa Rica, Central America (Hymenoptera: Formicidae; Hemiptera: Aphididae) 

  Espadaler, Xavier; Pérez Hidalgo, Nicolás; Villalobos Muller, William (2012)

  We present the first catalogue of ant-aphid associations (Hymenoptera: Formicidae / Hemiptera: Aphididae) of Costa Rica. 29 species of ants and 18 species of aphids establish 48 relationships. Those interactions seem not ...

• C1 compounds shape the microbial community of an abandoned century-old oil exploration well 

  Rojas Gätjens, Diego; Fuentes Schweizer, Paola; Rojas Jiménez, Keilor; Pérez Pantoja, Danilo; Avendaño Vega, Roberto; Alpízar Mena, Randall; Coronado Ruiz, Carolina; Chavarría Vargas, Max (2020)

  The search for microorganisms that degrade hydrocarbons is highly relevant because it enables the bioremediation of these substances cheaply and without dangerous by-products. In this work, we studied the microbial communities ...

• Rapid shift in microbial community structure in a neutral hydrothermal hot spring from Costa Rica 

  Rojas Gätjens, Diego; Arce Rodríguez, Alejandro; Puente Sánchez, Fernando; Avendaño Vega, Roberto; Libby Hernández, Eduardo; Conejo Barboza, Geraldine; Mora Amador, Raúl Alberto; Rojas Jiménez, Keilor; Pieper, Dietmar H.; Chavarría Vargas, Max (2020)

  In this work, we characterize the geochemistry and microbial community of Bajo las Peñas, a neutral (pH 6.5-7.4), hot spring (T = 62.0-68.0°C) located near Turrialba Volcano, Costa Rica. The microbiota at its two sources ...

• Temperature and elemental sulfur shape microbial communities in two extremely acidic aquatic volcanic environments 

  Rojas Gätjens, Diego; Arce Rodríguez, Alejandro; Puente Sánchez, Fernando; Avendaño Vega, Roberto; Libby Hernández, Eduardo; Mora Amador, Raúl Alberto; Rojas Jiménez, Keilor; Fuentes Schweizer, Paola; Pieper, Dietmar H.; Chavarría Vargas, Max (2021)

  Aquatic environments of volcanic origin provide an exceptional opportunity to study the adaptations of microbial communities to early planet life conditions such as high temperatures, high metal concentrations, and low pH. ...

• Bocaparvovirus, Erythroparvovirus and Tetraparvovirus in New World Primates from Central America 

  Chaves Ramírez, Andrea; Ibarra Cerdeña, Carlos N.; López Pérez, Andrés; Monge Solano, Otto; Avendaño Vega, Roberto; Ureña Saborío, Hilary; Chavarría Vargas, Max; Zaldaña, Karla; Sánchez, Lucía; Ortíz Malavasi, Edgar; Suzán, Gerardo; Foley, Janet; Gutiérrez Espeleta, Gustavo A. (2020)

  Parvoviruses in the genera Bocaparvovirus (HBoV), Erythroparvovirus (B19) and Tetraparvovirus (PARV4) are the only autonomous parvoviruses known to be associated with human and non‐human primates based on studies and ...

• Bryophyte and lichen biomass and nitrogen fixation in a high elevation cloud forest in Cerro de La Muerte, Costa Rica 

  Markham, John; Fernández Otárola, Mauricio (2021-01)

  Cloud forests have been found to lose more nitrogen in stream discharge than they gain from atmospheric deposition. They also support a large diversity and biomass of tree epiphytes, predominately composed of cryptogams. ...

• ArsH protects Pseudomonas putida from oxidative damage caused by exposure to arsenic 

  Páez Espino, David Antonio; Nikel Mayer, Pablo Iván; Chavarría Vargas, Max; de Lorenzo, Víctor (2020-03-23)

  The two As resistance arsRBC operons of Pseudomonas putida KT2440 are followed by a downstream gene called arsH that encodes an NADPH‐dependent flavin mononucleotide reductase. In this work, we show that the arsH1 and (to ...

• Redox stress reshapes carbon fluxes of Pseudomonas putida for cytosolic glucose oxidation and NADPH generation 

  Nikel Mayer, Pablo Iván; Fuhrer, Tobias; Chavarría Vargas, Max; Sánchez Pascuala, Alberto; Sauer, Uwe; de Lorenzo, Víctor (2020)

  The soil bacterium and metabolic engineering platform Pseudomonas putida tolerates high levels of endogenous and exogenous oxidative stress, yet the ultimate reason of such property remains unknown. To shed light on this ...

• Phylogenetic analysis of ITS data from endophytic fungi using massive parallel bayesian tree inference with exabayes 

  Montero Vargas, Maripaz; Umaña Jiménez, Jean Carlo; Escudero Leyva, Efraín; Chaverri Echandi, Priscila (2020-03-27)

  Ecological studies of fungal communities have been favored thanks to the emergence and improvement of independent culture techniques that use the ITS region as a molecular marker. This has allowed a more accurate identification ...

• Step‐by‐Step Pipeline for the Ecological Analysis of Endophytic Fungi using ITS nrDNA Data 

  Montero Vargas, Maripaz; Escudero Leyva, Efraín; Díaz Valerio, Stefani; Chaverri Echandi, Priscila (2020-01-07)

  The nuclear ribosomal DNA internal transcribed spacer (ITS) is accepted as the genetic marker or barcode of choice for the identification of fungal samples. Here, we present a protocol to analyze fungal ITS data, from ...

• The putative phosphate transporter PitB (PP1373) is involved in tellurite uptake in Pseudomonas putida KT2440 

  Montenegro, Rafael; Vieto, Sofía; Wicki Emmenegger, Daniela; Vásquez Castro, Felipe; Coronado Ruiz, Carolina; Fuentes Schweizer, Paola; Calderón Mesén, Paula; Pereira Reyes, Reinaldo; Chavarría Vargas, Max (2020)

  Tellurium oxyanions are chemical species of great toxicity and their presence in the environment has increased because of mining industries and photovoltaic and electronic waste. Recovery strategies for this metalloid that ...

• Mycelial inhibition of Trichoderma spp. (Hypocreaceae) isolated from the cultivation of Pleurotus ostreatus (Pleurotaceae) with an extract of Pycnoporus sp. (Polyporaceae) 

  Talavera Ortiz, Anaid; Chaverri Echandi, Priscila; Díaz Godínez, Gerardo; Acosta Urdapilleta, María de Lourdes; Villegas Villarreal, Elba Cristina; Téllez Téllez, Maura (2020-01-07)

  Background and Aims: The production of edible fungi is affected by bacterial, fungal and viral diseases, which very often cause large losses. In the production of mushrooms of the genus Pleurotus, the fungi of Trichoderma ...

• Visualizing the invisible: class excursions to ignite children’s enthusiasm for microbes 

  McGenity, Terry J.; Gessesse, Amare; Hallsworth, John E.; García Cela, Esther; Verheecke Vaessen, Carol; Wang, Fengping; Chavarría Vargas, Max; Haggblom, Max M.; Molin, Søren; Danchin, Antoine; Smid, Eddy J.; Lood, Cédric; Cockell, Charles S.; Whitby, Corinne; Liu, Shuang‐Jiang; Keller, Nancy P.; Stein, Lisa Y.; Bordenstein, Seth R.; Lal, Rup; Nunes, Olga C.; Gram, Lone; Singh, Brajesh K.; Webster, Nicole S.; Morris, Cindy; Sivinski, Sharon; Bindschedler, Saskia; Junier, Pilar; Antunes, André; Baxter, Bonnie K.; Scavone, Paola; Timmis, Kenneth N. (2020)

  We have recently argued that, because microbes have pervasive – often vital – influences on our lives, and that therefore their roles must be taken into account in many of the decisions we face, society must become ...

• Using Student Profiles to Motivate and Understand How to Attract Women to Computer Science 

  Marín Raventós, Gabriela; Romero Chacón, Rosaura María; Monge Soto, Ana Laura (2020)

  This article reports how to build and analyze student profiles to influence the perception that girls and young women have of the profession, and of the diverse work opportunities that exist in Computer Science in Costa ...

• General Chemistry Without Orbitals 

  Lamoureux Lamontagne, Guy; Ogilvie, John F. (2020)

  We illustrate the solutions of Schroedinger's equation for the hydrogen atom in coordinates of all four systems, and differentiate the applicability of orbitals in these four systems. We present reasons that future textbooks ...

• Concomitant prediction of environmental fate and toxicity of chemical compounds 

  García Martín, Juan Antonio; Chavarría Vargas, Max; de Lorenzo, Víctor; Pazos, Florencio (2020)

  The environmental fate of many functional molecules that are produced on a large scale as precursors or as additives to specialty goods (plastics, fibers, construction materials, etc.), let alone those synthesized by the ...

• Short communication: Effect of different kefir grains on the attributes of kefir produced with milk from Costa Rica 

  de Sainz, Isabela; Redondo Solano, Mauricio; Solano Arias, Godofredo; Ramírez Varas, Lautaro Javier (2020)

  Kefir is an artisanal product that is gaining scientific attention due to its increase in consumption attributed to its potential health benefits. The effect on the quality attributes of kefir grains of different origin ...

• Purpureocillium roseum sp. nov. A new ocular pathogen for humans and mice resistant to antifungals 

  Calvillo Medina, Rosa Paulina; Ponce Angulo, Diana Gabriela; Raymundo, Tania; Müller Morales, Carlos Adolfo; Escudero Leyva, Efraín; Campos Guillén, Juan; Bautista de Lucio, Víctor (2020)

  Background Infectious keratitis is the main cause of preventable blindness worldwide, with about 1.5–2.0 million new cases occurring per year. This inflammatory response may be due to infections caused by bacteria, fungi, ...

• Richness and metallo-tolerance of cultivable fungi recovered from three high altitude glaciers from Citlaltépetl and Iztaccíhuatl volcanoes (Mexico) 

  Calvillo Medina, Rosa Paulina; Gunde Cimerman, Nina; Escudero Leyva, Efraín; Barba Escoto, Luis; Fernández Tellez, Elisa Irma; Medina Tellez, Ariadna Andrea; Bautista de Lucio, Víctor; Ramos López, Miguel Ángel; Campos Guillén, Juan (2020)

  In Mexico little is known about high-altitude glacial psychrotolerant or psychrophilic fungal species, with most glacial fungi isolated from polar environments or Alpine glaciers. It has been documented that some of these ...

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