Browsing Artículos Científicos by Title
Now showing items 1-20 of 539
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A bvrR/bvrS Non-Polar Brucella abortus Mutant Confirms the Role of the Two-Component System BvrR/BvrS in Virulence and Membrane Integrity
(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 cross-sectional survey of gastrointestinal parasites with dispersal stages in feces from Costa Rican dairy calves
(Elsevier B.V, 2010-07-24)A cross-sectional study was carried out to determine the prevalence of gastrointestinal parasites and lungworm nematodes in dairy calves from five different ecoclimatic areas of Costa Rica. Also intensity of infection ... -
A Differential Effect of Indian Ocean Dipole and El Niño on Cholera Dynamics in Bangladesh
(PLoS ONE, 2013-03-29)Background: A stationary (i.e., constant through time) association between El Niño Southern Oscillation (ENSO), the Indian Ocean Dipole (IOD) and epidemics of cholera in Bangladesh has been widely assumed. However, whether ... -
A joint Myxoma in a dog
(Harcourt Publishers Ltd, 2001)Myxomas of the joints are extremely rare in domestic animals, only four cases, all in dogs, having been reported previously. This paper describes a myxoma originating from the synovium of the right radiocarpal joint of ... -
A method to obtain rapid zoosporogenesis of Pythium insidiosum
(Kluwer Academic Publishers, 1988-10)Nine strains of Pythium insidiosum the etiologic agent of pythiosis, were inoculated on 2% water agar plus grass blades and then incubated one day at 25°C, 35°C and 37°C. Sporangium and secondary biflagellate-type zoosporas ... -
A new method for the detection of phospholipase A2 variants: Identification of isozymes in the venoms of newborn and adult Bothrops asper (terciopelo) snakes
(Elsevier B.V, 1988)E. Moreno, A. Alape, M. Sánchez and J. M. Gutiérrez. A new method for the detection of phospholipase A2 variants: identification of isozymes in the venoms of newborn and adult Bothrops asper (terciopelo) snakes. Toxicon ... -
A novel host-adapted strain of Salmonella Typhimurium causes renal disease in olive ridley turtles (Lepidochelys olivacea) in the Pacific
(Springer Nature, 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 ... -
A sensitive blotting system for detection of α-fetoprotein variants with monoclonal and polyclonal antibodies
(Elsevier, 1988-08-19)Human α-fetoprotein (AFP) variants from cord sera were separated by isoelectric focusing in agarose gels under native conditions, transferred to nitrocellulose paper and detected with polyclonal and monoclonal antibodies ... -
A sensor histidine kinase from a plant-endosymbiont bacterium restores the virulence of a mammalian intracellular pathogen
(Elsevier, 2023-11-08)Alphaproteobacteria include organisms living in close association with plants or animals. This interaction relies partly on orthologous two-component regulatory systems (TCS), with sensor and regulator proteins modulating ... -
A Sinorhizobium meliloti and Agrobacterium tumefaciens ExoR ortholog is not crucial for Brucella abortus virulence
(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 ... -
A survey on Triatoma dimidiata in an urban area of the province of Heredia, Costa Rica
(Mem Inst Oswaldo Cruz, 2005-10)Triatoma dimidiata has been found in several cities and towns of those countries where the insect is a domestic or peridomestic pest. In Central America, urban infestations occur in the capitals of at least five ... -
A two-component regulatory system playing a critical role in plant pathogens and endosymbionts is present in Brucella abortus and controls cell invasion and virulence
(Blackwell Science, 1998-04-08)Two mutants showing increased sensitivity to polycations and surfactants were obtained by transposon mutagenesis of virulent Brucella abortus 2308 Nal(r). These mutants showed no obvious in vitro growth defects and produced ... -
Absence of IgG antibodies against Schmallenberg virus in ruminant sera (bovine, goat and sheep) collected in Costa Rica between 2012 and 2014.
(Universidad Nacional, Costa Rica, 2017-07)Schmallenberg virus affects ruminants, which causes significant economic losses. The virus is transmitted through vectors of the genus Culicoides; however, other studies do not rule out the possibility of sexual transmission ... -
Activation of Rho and Rab GTPases dissociates Brucella abortus internalization from intracellular trafficking
(Blackwell Science, 2002-10-04)Brucella abortus is an intracellular pathogen that relies on unconventional virulence factors to infect hosts. In non-professional phagocytes, Rho GTPasesactivation by the Escherichia coli cytotoxic necrotiz ing factor ... -
Actividad gastroprotectora del extracto etanólico de hojas de Licania platypus (Hemsl.) Fritsh.
(Departamento de Farmacología de la Escuela de Medicina de la Universidad de Costa Rica, 2017-04-25)La especie Licania platypusdistribuida en países tropicales. Tradicionalmente, en América Central se han utilizado diferentes partes de la planta para diversos problemas de salud, especialmente gastrointestinales. Objetivo: ... -
Acurácia da ultrassonografia Modo-B no diagnóstico de gestação e determinação do número de fetos em matrizes suínas
(Ciência Veterinária nos Trópicos, 2009)Neste trabalho objetivou-se avaliar a acurácia da ultrassonografia Modo- B como método diagnóstico de gestação nos dias 21 e 22 pós-inseminação artifici- al, de acordo com o número de vesículas embrionárias (VEs) contadas, ... -
Additive genetic and heterosis effects for milk fever in a population of Jersey, Holstein × Jersey, and Holstein cattle under grazing conditions
(FASS Inc. and Elsevier Inc., 2018-10)The aim of this study was to estimate additive genetic and heterosis effects for milk fever (MF) in Costa Rican dairy cattle. A farm-based management information software was used to collect 223,783 parity records between ... -
Aerobic bacterial flora of nesting green turtles (Chelonia mydas) from Tortuguero National Park, Costa Rica
(American Association of Zoo Veterinarians, 2006)Bacteriological examination of 70 nesting green turtles (Chelonia mydas) from Tortuguero National Park, Costa Rica was performed to investigate nasal and cloacal aerobic bacteria. A total of 325 bacterial isolates were ... -
Age and Sexual Maturity Estimation of Stranded Striped Dolphins, Stenella coeruleoalba, Infected with Brucella ceti
(MDPI, 2022-10-31)Age parameters in cetaceans allow examining conservation and studying individuals with growth affection. The age and sexual maturity of 51 stranded Stenella coeruleoalba striped dolphins from the Eastern Tropical Pacific ... -
Agreement among equine veterinarians and between equine veterinarians and inertial sensor system during clinical examination of hindlimb lameness in horses
(Equine Veterinary Journal Ltd, 2019-06-24)Background: Hindlimb lameness evaluation is known to be challenging. Experience is essential for the ability of equine veterinarians to detect lameness. Nevertheless, even an experienced veterinarian is still subject to ...
