Now showing items 1-18 of 18

    • A novel host-adapted strain of Salmonella Typhimurium causes renal disease in olive ridley turtles (Lepidochelys olivacea) in the Pacific 

      Thierry, Work; Dagenais, Julie; Stacy, Brain; Ladner, Jason; Lorch, Jeffrey; Balazs, George; BARQUERO-CALVO, ELIAS; Breeden, Renee; Corrales Gómez, Natalia; Berlowski-Zier, Brenda; Gonzalez-Barrientos, Rocio; Harris, Heather; Hernández-Mora, Gabriela; Herrera-Ulloa, Ángel; Hesami, Shoreh; Jones, Todd; Morales, Juan Alberto; Norton, Terry M.; Rameyer, Robert A.; Taylor, Daniel; Waltzek, Thomas (Universidad Nacional, Costa Rica, 2019-06-27)
      Salmonella spp. are frequently shed by wildlife including turtles, but S. enterica subsp. enterica serovar Typhimurium or lesions associated with Salmonella are rare in turtles. Between 1996 and 2016, we necropsied 127 ...
    • Application of multiplex quantitative Polymerase chain reaction methods to detect common bacterial fish pathogens in Nile tilapia, Oreochromis niloticus, hatcheries in Costa Rica 

      Kenelty, Kirsten; Barum, Samantha; Soto, Esteban; López-Porras, Adrián; Elizondo-Ovares, Carolina; Chaves Hernández, Aida J.; Camus, Alvin; Griffin, Matt; BARQUERO-CALVO, ELIAS (WILEY, 2018-09-29)
      Edwardsiella spp., Streptococcus spp., and Francisella noatunensis subsp. orientalis are some of the most important fish pathogens affecting global tilapia, Oreochromis spp., aquaculture. In Costa Rica, the aquaculture ...
    • Brucella abortus ornithine lipids are dispensable outer membrane components devoid of a marked pathogen-associated molecular pattern 

      Palacios-Chaves, Leyre; Conde-Álvarez, Raquel; Gil-Ramírez, Yolanda; Zúñiga-Ripa, Amaia; BARQUERO-CALVO, ELIAS; Chacón-Díaz, Carlos; Chaves-Olarte, Esteban; Arce-Gorvel, Vilma; Gorvel, Jean-Pierre; Moreno, Edgardo; de Miguel, María-Jesús; Grilló, María-Jesús; Moriyon, Ignacio; Iriarte, Maite (PLoS One, 2011-01-07)
      The brucellae are a-Proteobacteria facultative intracellular parasites that cause an important zoonosis. These bacteria escape early detection by innate immunity, an ability associated to the absence of marked pathogen-associated ...
    • Brucella ceti and brucellosis in cetaceans 

      Guzman-Verri, Caterina; González-Barrientos, Rocio; Hernández-Mora, Gabriela; Morales, Juan Alberto; BARQUERO-CALVO, ELIAS; Chaves-Olarte, Esteban; Moreno, Edgardo (Frontiers in cellular and infection microbiology, 2012-02-06)
      Since the first case of brucellosis detected in a dolphin aborted fetus, an increasing number of Brucella ceti isolates has been reported in members of the two suborders of cetaceans: Mysticeti and Odontoceti. Serological ...
    • Brucellosis caused by the wood rat pathogen Brucella Neotomae: two case reports 

      Arnuy, Ernesto; Rojas, Norman; Villalobos-Vindas, Juan M.; BARQUERO-CALVO, ELIAS; Chacón-Díaz, Carlos; Chaves-Olarte, Esteban; Guzman-Verri, Caterina; Moreno, Edgardo (Journal of Medical Case Reports, 2017-12-19)
      Background: Brucellosis is a chronic bacterial disease caused by members of the genus Brucella. Among the classical species stands Brucella neotomae, until now, a pathogen limited to wood rats. However, we have identified ...
    • Chromobacterium violaceum infection in a free ranging howler monkey in Costa Rica 

      Baldi, Mario; Morales, Juan Alberto; Hernandez, Giovanna; Jiménez-Soto, Mauricio; Alfaro-Alarcón, Alejandro; BARQUERO-CALVO, ELIAS (Wildlife Disease Association, 2010)
      Chromobacterium violaceum is a gram-negative saprobe bacterium that is a rare opportunistic pathogen in mammals. There are numerous reports in humans including fatalities, but no record exists in free-ranging nonhuman ...
    • Depletion of complement enhances the clearance of Brucella abortus in mice 

      González-Espinoza, Gabriela; BARQUERO-CALVO, ELIAS; Lizano-González, Esteban; Alfaro-Alarcón, Alejandro; Arias-Gómez, Berny; Chaves-Olarte, Esteban; Moreno, Edgardo; Lomonte, Bruno; Chacón-Díaz, Carlos (American Society for Microbiology, 2018-08-06)
      Brucellosis is a bacterial disease of animals and humans. Brucella abortus barely activates the innate immune system at the onset of infection, and this bacterium is resistant to the microbicidal action of complement. Since ...
    • Es erróneo hacer una asociación directa entre la detección de Helicobacter spp.y gastritis en caninos 

      Suárez-Esquivel, Marcela; BARQUERO-CALVO, ELIAS (Revista de Ciencias Veterinarias, 2017-12-03)
      It has been proposed that Helicobacter may play a significant role in the generation of gastritis and cancer in dogs. However, despite several independent efforts, there is still controversy regarding the true ability of ...
    • Francisella marina Sp. nov., etiologic agent of systemic disease in cultured spotted rose snapper (Lutjanus Guttatus) in Central America 

      Soto, Esteban; Morales, Juan Alberto; Sebastiao, Fernanda de Alexandre; García, Julio; Griffin, Matt; BARQUERO-CALVO, ELIAS; López-Porras, Adrián; Víquez-Rodríguez, Xindy; Reichley, Stephen; Rosser, Thomas; Ware, Cynthia; Byrne, Barbara; LaFrentz, Benjamin; Camus, Alvin (American Society for Microbiology, 2018-06-18)
      Historically, piscine francisellosis in various warm-, temperate-, and cold-water fish hosts has been attributed to Francisella noatunensis From 2015 to 2016, an undescribed Francisella sp. was recovered during mortality ...
    • Frecuency and species of Campylobacter spp. in broiler at three levels of the poultry production chain of Costa Rica 

      Zumbado Gutiérrez, Leana; Romero-Zúñiga, Juan José; BARQUERO-CALVO, ELIAS; Abarca Gómez, Jessica; Jiménez Mora, Mónica; Ravery Morovati, Vandad; Arias Echandi, María Laura (International Journal of Current Research, 2019-02-28)
      Campylobacter spp. is one of the main bacteria that cause food borne illness. Many of these cases are caused by C. jejuni and C. coli, which are transmitted mainly by poultry. A cross-sectional study, conducted between ...
    • Multidrug-resistant Clostridium Difficile Ribotypes 078 and 014/5-FLI01 in Piglets From Costa Rica 

      Seyboldt, Christian; Tzoc, Edgardo; Rodríguez, César; Andino-Molina, Mauricio Alejandro; BARQUERO-CALVO, ELIAS; Schmoock, Gernot; Neubauer, Heinrich; Quesada-Gómez, Carlos (Elsevier, 2018-11-08)
      Though an overlap of Clostridium difficile PCR ribotypes (RT) in humans and animals has been noted -particularly in piglets-information regarding C. difficile isolates from swine is scarce in Latin America. A characterization ...
    • 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 ...
    • Pansusceptible Escherichia Coli isolates obtained from faeces of free-ranging baird's tapirs (Tapirus Bairdii) suggests a low selective pressure for resistance determinants in the Northwestern Region of the Talamanca Mountain Range, Costa Rica 

      Rojas-Jiménez, Jorge; Brenes-Mora, Esteban; Alcázar García, Paloma Elizabeth; Arguedas, Randall; BARQUERO-CALVO, ELIAS (Elsevier, 2018-09-27)
      Objectives The main objective of this study was to analyse the antimicrobial susceptibility profile of Escherichia coli isolates obtained from faecal samples of free-ranging Baird’s tapirs (Tapirus bairdii) in the ...
    • Persistence of Brucella abortus in the bone marrow of infected mice 

      Gutiérrez-Jiménez, Cristina; HYSENAJ, LISIENA; Alfaro-Alarcón, Alejandro; Mora-Cartín, Ricardo; Gorvel, Jean-Pierre; Arce-Gorvel, Vilma; Moreno, Edgardo; BARQUERO-CALVO, ELIAS (Journal of Immunology Research, 2018-12-03)
      Brucellosis is a zoonotic bacterial infection that may persist for long periods causing relapses in antibiotic-treated patients. The ability of Brucella to develop chronic infections is linked to their capacity to invade ...
    • Persistence of Brucella abortus lineages revealed by genomic characterization and phylodynamic analysis 

      Suárez-Esquivel, Marcela; Henández-Mora, Gabriela; Ruiz-Villalobos, Nazareth; BARQUERO-CALVO, ELIAS; Chacón-Díaz, Carlos; LadnerI, JasonT.; Oviedo-Sánchez, Gerardo; Foster, JeffreyT.; Rojas-Campos, Norman; Chaves-Olarte, Esteban; Thomson, Nicholas; Moreno, Edgardo; Guzman-Verri, Caterina (Universidad Nacional, Costa Rica, 2020-04-14)
      Brucellosis, caused by Brucella abortus, is a major disease of cattle and humans worldwide distributed. Eradication and control of the disease has been difficult in Central and South America, Central Asia, the Mediterranean ...
    • Role of Clostridium perfringens toxins in necrotic enteritis in poultry 

      Ramírez, M; Flores-Díaz, M; BARQUERO-CALVO, ELIAS; Alape-Girón, Alberto (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 ...
    • Salmonellosis detection and evidence of antibiotic resistance in an urban raccoon population in a highly populated area, Costa Rica 

      BALDI, MARIO; BARQUERO-CALVO, ELIAS; Hutter, Sabine; Walzer, Chris (WILEY, 2019-07-29)
      Wild animals are involved in zoonotic disease transmission cycles. These are generally complex and poorly understood, especially among animals adapted to life in human ecosystems. Raccoons are reservoirs and effective ...