Now showing items 1-20 of 46

    • A bvrR/bvrS Non-Polar Brucella abortus Mutant Confirms the Role of the Two-Component System BvrR/BvrS in Virulence and Membrane Integrity 

      Rivas-Solano, Olga; Núñez-Montero, Kattia; Altamirano-Silva, Pamela; Ruiz-Villalobos, Nazareth; BARQUERO-CALVO, ELIAS; Moreno, Edgardo; Chaves-Olarte, Esteban; Guzman-Verri, Caterina (MDPI, 2023-08-05)
      Brucella abortus is a bacterial pathogen causing bovine brucellosis worldwide. This facultative extracellular–intracellular pathogen can be transmitted to humans, leading to a zoonotic disease. The disease remains a public ...
    • A Sinorhizobium meliloti and Agrobacterium tumefaciens ExoR ortholog is not crucial for Brucella abortus virulence 

      Castillo Zeledon, Amanda; Ruiz-Villalobos, Nazareth; Altamirano-Silva, Pamela; Chacón-Díaz, Carlos; BARQUERO-CALVO, ELIAS; Chaves-Olarte, Esteban; Guzman-Verri, Caterina (PLOS ONE, 2021-08-13)
      Brucella is a facultative extracellular-intracellular pathogen that belongs to the Alphaproteo- bacteria class. Precise sensing of environmental changes and a proper response mediated by a gene expression regulatory ...
    • Aspectos epidemiológicos de la brucelosis en humanos en las Áreas Rectoras Aguas Zarcas y Los Chiles, Costa Rica, 2015-2017 

      Rosales Galeano, Claudia; Puentes Mojica, Claudia; Arias Rojas, Oldemar; ROMERO-ZUÑIGA, JUAN JOSÉ (Universidad Nacional, Costa Rica, 2020-02-02)
      La brucelosis es una enfermedad zoonótica causada por especies del género Brucella spp., con baja notificación y subregistro en Costa Rica, especialmente en personas y en bovinos. Se determina la seroprevalencia ...
    • Baylisascariasis como diagnóstico diferencial larva migrans en humanos, Costa Rica 

      Baldi Salas, Mario; Walzer, Chris (Universidad de Costa Rica, 2018-04-25)
      Baylisascariasis es una enfermedad causada por una animales, clasificada como una zoonosis emergente de importancia en salud pública. El agente causal es el nemátodo Baylisascaris procyonis, siendo su huésped definit de ...
    • Brucella canis is an intracellular pathogen that induces a lower proinflammatory response than smooth zoonotic counterparts 

      Guzman-Verri, Caterina; Chacón-Díaz, Carlos; Altamirano-Silva, Pamela; González-Espinoza, Gabriela; Medina, María-Concepción; Alfaro-Alarcón, Alejandro; Bouza-Mora, Laura; Jiménez-Rojas, César; Wong, Melissa; BARQUERO-CALVO, ELIAS; Rojas, Norman; Moreno, Edgardo; Chaves-Olarte, Esteban (Infection and Immunity, 2015-09-29)
      Canine brucellosis caused by Brucella canis is a disease of dogs and a zoonotic risk. B. canis harbors most of the virulence determinants defined for the genus, but its pathogenic strategy remains unclear since it has not ...
    • Brucella genomics: macro and micro evolution 

      Guzman-Verri, Caterina; Suárez-Esquivel, Marcela; Chaves Olarte, Esteban; Moreno, Edgardo (MDPI AG, 2020-10-20)
      Brucella organisms are responsible for one of the most widespread bacterial zoonoses, named brucellosis. The disease affects several species of animals, including humans. One of the most intriguing aspects of the brucellae ...
    • Brucella neotomae infection in humans, Costa Rica 

      BARQUERO-CALVO, ELIAS; Baker, Kate S.; Amuy, Ernesto; Chaves-Olarte, Esteban; Thomson, Nicholas R.; Moreno, Edgardo; Guzman-Verri, Caterina; Suárez-Esquivel, Marcela; Ruiz-Villalobos, Nazareth; Jiménez-Rojas, César; Chacón-Díaz, Carlos; Víquez-Ruiz, Eunice; Rojas-Campos, Norman; Oviedo-Sánchez, Gerardo (Emerging Infectious Diseases, 2017-06)
      Several species of Brucella are known to be zoonotic, but B. neotomae infection has been thought to be limited to wood rats. In 2008 and 2011, however, B. neotomae was isolated from cerebrospinal fluid of 2 men with ...
    • Brucella sp. sequence‑type 27 associated with abortion in dwarf sperm whale Kogia sima 

      Hernández-Mora, Gabriela; González-Barrientos, Rocío; Víquez‑Ruíz, Eunice; Palacios Alfaro, Jose David; Bettoni‑Rodríguez, Gianmarco; Gendre, Marlène; Vincent, Charline; Roca‑Monge, Karol; Ruiz-Villalobos, Nazareth; Suárez-Esquivel, Marcela; Cordero‑Chavarría, Minor; Chaves-Olarte, Esteban; Thomson, Nicholas R.; BARQUERO-CALVO, ELIAS; Moreno, Edgardo; Guzman-Verri, Caterina (Springer Link, 2021-05-18)
      A dwarf sperm whale Kogia sima stranded alive along the Central Pacifc Coast of Costa Rica. The whale, handled by tourists and local inhabitants, was weak, had buoyancy difculties, and eventually aborted and died, showing ...
    • 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 ...
    • Case report: First documented case of cerebral angiostrongyliasis caused by Angiostrongylus costaricensis in a free-ranging opossum 

      Solorzano-Scott, Tamara; Aguilar-Vargas, Fernando; Cordero-Salas, Martha; Conejo, Amanda; Rojas, Alicia; Baldi, Mario (Frontiers, 2024-02-01)
      Angiostrongylus costaricensis is a metastrongyloid nematode that primarily infects the mesenteric arteries of wild rodents. This parasite is endemic in several regions of the American continent, and in humans, causes a ...
    • Caso de Otodectes cynotis en un gato cachorro 

      Vega Solano, Raquel; Jiménez Rochal, Ana E.; Calderón Hernández, Alejandra; BARQUERO-CALVO, ELIAS; Orozco Sánchez, Laura; Solano Rodríguez, José P. (Universidad Nacional, Costa Rica, 2012)
      Otodectes cynotis se conoce como el ácaro de la oreja y causa entre el 50-84% de otitis externa en gatos. Pertenece a la familia Psoroptidae y afecta conejos, gatos, hurones, pe- rros y ratas; principalmente a los ...
    • Changes in Phlebotomine Sand Fly Species Composition Following Insecticide Thermal Fogging in a Rural Setting of Western Panamá 

      Calzada, Jose E.; Saldaña, Azael; Rigg, Chystrie; Valderrama, Anayansi; Romero, Luz; Fernando Chaves, Luis (PLOS ONE, 2013-01-09)
      American Cutaneous Leishmaniasis, ACL, is a zoonotic disease with a large richness of co-occurring vector species in transmission foci. Here, we describe changes in patterns of phlebotomine sand fly (Diptera: Psychodidae: ...
    • Chlamydia psittaci genotype B in a pigeon (Columba livia) inhabiting a public place in San José, Costa Rica 

      Dolz, Gaby; Solórzano-Morales, Á.; Angelova, L.; Tien, C.; Fonseca, Luis; Bonilla, Marta C. (University of Tripoli, 2013-12-02)
      Human chlamydiosis is a zoonotic disease of avian origin caused by Chlamydia psittaci. The highest infection rates have been detected in parrots (Psittacidae) and pigeons (Columbiformes), the latter most frequently carry ...
    • Contracaeum multipapillatum (Nematoda: Anisakidae) en peces de aguas continentales de Guanacaste, Costa Rica e Izabal, Guatemala 

      Choc Martínez, Luis Felipe; Arguedas cortés , Donald ; Jiménez Rocha, Ana Eugenia; Dolz, Gaby (Revista Colombiana de Ciencia Animal (RECIA), 2020)
      Contracaecum multipapillatum es un nemátodo para el cual, los peces actúan como hospedador intermediario y el ser humano como hospedador accidental, por consumo de carne de pescado cruda o semi cocinada. Este riesgo para ...
    • Demographic and pathogens of domestic, free-roaming pets and the implications for wild carnivores and human health in the San Luis Region of Costa Rica 

      Conrad, Joseph; Norman, Jason; Rodriguez, Amalia; Dennis, Patricia M.; Arguedas, Randall; Jimenez, Carlos; Hope, Jenifer; Yabsley, Michael; Hernández, Sonia M. (MDPI AG, 2021-04-20)
      Habitat loss and degradation, restricted ranges, prey exploitation, and poaching are important factors for the decline of several wild carnivore populations and additional stress from infectious agents is an increasing ...
    • Detección de anticuerpos anti-Toxocara spp. en caninos de una comunidad periurbana de la provincia de Heredia, Costa Rica 

      Dolz, Gaby; Guzmán-Gómez, Natalia; Bermúdez-Salas, F. Raúl; Schmidt, Luis José; Bonilla, Marta C.; Urbina-Villalobos, Andrea (Universidad Nacional, Costa Rica, 2020-06-29)
      La toxocariasis es una enfermedad zoonótica cosmopolita causada por nemátodos del género Toxocara. Los perros son hospedadores definitivos de Toxocara canis y pueden ser asintomáticos o presentar signos clínicos inespecíficos. ...
    • Detection of antibodies against Chlamydophila abortus in Costa Rican sheep flocks 

      Dolz, Gaby; Villagra-Blanco, R.; Montero-Caballero, Danilo; Romero-Zúñiga, Juan José (Open Veterinary Journal, 2015-09-01)
      A total of 359 sheep samples from 15 flocks were analyzed for the presence of antibodies against Chlamydophila abortus using a commercial Enzyme linked Immunosorbent Assay (ELISA). Antibodies were detected in 19 (5.29%) ...
    • Detection of Rickettsia monacensis and Rickettsia amblyommatis in ticks collected from dogs in Costa Rica and Nicaragua 

      Springer, Andrea; Schicht, Sabine; Wölfel, Silke; Schaper, Sabine R.; Chitimia-Dobler, Lidia; Siebert, Susanne; Strube, Christina; Montenegro Hidalgo, Víctor Manuel (Elsevier B.V, 2018-08-04)
      The neotropical climate of Central America provides ideal conditions for ticks, which may transmit several human pathogens, including spotted-fever group Rickettsia. Dogs may act as sentinels or reservoirs for human tick-borne ...
    • Dueños responsables: concientizando, informando y viendo crecer 

      Palacios Quirós, Esteban; Arias Garro, Nazareth; Chaves Cordero, Catalina; Estrada Pacheco, Andrea; García Campos, Gabriela; Monge Díaz, Luis; Jiménez Rocha, Ana E. (Biocenosis publicación de la Universidad Estatal a Distancia, 2017-03-30)
      El ser humano y las especies domésticas guardan hoy en día una relación muy cercana, la cual puede favorecer la transmisión de agentes zoonóticos y causar enfermedad. Con el objetivo de crear conciencia sobre los propietarios ...
    • Emerging Lagochilascaris minor infections in domestic cats from Costa Rica: A zoonotic threat for the region 

      Solano Barquero, Alberto; Estrada, Ana; Medaglia, Alejandro; Rojas, Alicia; Montenegro Hidalgo, Víctor Manuel (Elsevier, 2022)
      Two cases of lagochilascariasis minor in domestic cats from Costa Rica within a period of two months are recorded for the first time in Central America. Clinical findings included purulent discharge and a tumor in the left ...