Browsing Facultad de Ciencias de la Salud by Subject "BACTERIAS"
Now showing items 1-20 of 78
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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 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 ... -
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 ... -
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 ... -
Alertan ante derretimiento de glaciales
(Escuela de Medicina Veterinaria, 2020-03)A medida que el cambio climático provocado por el ser humano derrite los glaciares en todo el mundo, podrían resurgir microorganismos desconocidos por la ciencia. Si bien el coronavirus ha puesto en alerta a la población ... -
Alertan sobre transmisión de bacteria aviar
(Oficina de Comunicación, Universidad Nacional, 2017-06)Loras, pericos, cacatúas y hasta palomas serían las reponsables de transmitir una peligrosa enfermedad bacteriana que se manifiesta en la persona con neumonía o endocarditis severa en su etapa aguda, la cual los médicos ... -
Analysis of the association between density of Helicobacter spp and gastric lesions in dogs
(American Journal of Veterinary Research, 2017-12)OBJECTIVE To evaluate the correlation between the density of native gastric Helicobacter spp and the presence of gastric lesions in dogs. ANIMALS 80 dogs of various breeds, sexes, and ages. PROCEDURES Gastroscopic and ... -
Antimicrobial activity of myotoxic phospholipases A2 from crotalid snake venoms and synthetic peptide variants derived from their C-terminal region
(Elsevier, 2005)A short peptide derived from the C-terminal region of Bothrops asper myotoxin II, a Lys49 phospholipase A2 (PLA2), was previously found to reproduce the bactericidal activity of its parent molecule. In this study, a panel ... -
ASGARD+: A New Modular Platform for Bacterial Antibiotic-Resistant Analysis
(Wiley Online Library, 2023-03-09)ASGARD+ (Accelerated Sequential Genome-analysis and Antibiotic Re- sistance Detection) is a command-line platform for automatic identification of antibiotic-resistance genes in bacterial genomes, providing an ... -
Bacterial counts in spleen
(Bio-protocol, 2013-11-05)Bacterial loads can be determined as colony forming units (CFU) at any point of the infection by culturing spleen homogenates on agar plates. This is a reliable method for comparing the kinetics of infection in various ... -
Brucella abortus induces the premature death of human neutrophils through the action of Its lipopolysaccharide
(PLoS Pathogens, 2015-05-06)Most bacterial infections induce the activation of polymorphonuclear neutrophils (PMNs), enhance their microbicidal function, and promote the survival of these leukocytes for protracted periods of time. Brucella abortus ... -
Brucella abortus ornithine lipids are dispensable outer membrane components devoid of a marked pathogen-associated molecular pattern
(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 abortus senses the intracellular environment through the BvrR/Bvrs two-component system, which allows B. abortus to adapt to its replicative nich
(American Society for Microbiology., 2018-01-16)Brucella abortus is a facultative extracellular-intracellular pathogen belonging to a group of Alphaproteobacteria that establishes close interactions with animal cells. This bacterium enters host cells in a membrane-bound ... -
Brucella abortus transits through the autophagic pathway and replicates in the endoplasmic reticulum of nonprofessional phagocytes
(American Society for Microbiology, 1988-09-01)Brucella abortus is an intracellular pathogen that replicates within a membrane-bounded compartment. In this study, we have examined the intracellular pathway of the virulent B. abortus strain 2308 (S2308) and the attenuated ... -
Brucella evolution and taxonomy
(Elsevier Science B.V, 2002)The genus Brucella contains alpha-Proteobacteria adapted to intracellular life within cells of a variety of mammals. Controversy has arisen concerning Brucella internal taxonomy, and it has been proposed that the DNA–DNA ... -
Brucella melitensis: a nasty bug with hidden credentials for virulence
(The National Academy of Sciences, 2002-01-08)On September 23, 1905, a cargo carrying 60 goats from Malta arrived in New York. The herd was kept in quarantine because of several deaths that occurred during the journey. Crewmen, an agent from the U.S. Bureau of Animal ... -
Brucella β 1,2 cyclic glucan is an activator of human and mouse dendritic cells
(PLoS Pathogens, 2012-11-15)Bacterial cyclic glucans are glucose polymers that concentrate within the periplasm of alpha-proteobacteria. These molecules are necessary to maintain the homeostasis of the cell envelope by contributing to the osmolarity ... -
Brucella-Salmonella lipopolysaccharide chimeras are less permeable to hydrophobic probes and more sensitive to cationic peptides and EDTA than are their native Brucella sp. counterparts
(American Society for Microbiology, 1996-08-12)A rough (R) Brucella abortus 45/20 mutant was more sensitive to the bactericidal activity of polymyxin B and lactoferricin B than was its smooth (S) counterpart but considerably more resistant than Salmonella montevideo. ... -
Caracterización fenotípica y molecular de aislamientos multirresistentes de Staphylococcus aureus en el Laboratorio de Bacteriología de la Escuela de Medicina Veterinaria, Universidad Nacional
(Universidad Nacional, Costa Rica, 2022)Staphylococcus aureus es una bacteria oportunista que puede causar infecciones en animales y seres humanos cuando las barreras cutáneas y mucosas se rompen. Estas infecciones se han convertido en una amenaza para la salud ...