Browsing by Subject "BACTERIAS"
Now showing items 21-40 of 106
-
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 de bacterias endófitas cultivables aisladas de Rhizophora mangle y su potencial como promotores del crecimiento en Oryza sativa
(Universidad Nacional, Costa Rica, 2023)Se caracterizó el potencial biotecnológico de bacterias endófitas cultivables aisladas de hojas y de raíces aéreas de Rhizophora mangle del Manglar de Puntarenas, Costa Rica, y su efecto como promotores de crecimiento ... -
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 ... -
Carga bacteriana de los peces Cynoscion squamipinnis(Perciformes: Scianidae) y Lutjanus gutattus (Perciformes: Lutjanidae) en la cadena de comercialización, Costa Rica
(Universidad de Costa Rica, 2009-06)Bacteriological load of the fishes Cynoscion squamipinnisand Lutjanus gutattusin the market-ing chain, Costa Rica. To determine the bacteriological quality of fishery products in the different stages from commercialization, ... -
Changes in the protein fraction of Merluccius Bilinearis muscle under lactic acid bacterial fermentation using a Lactobacillus Acidophilus starler culture.
(Universidad Nacional (Costa Rica), 1987-01-01)The effect of lactic acid bacterial fermentation on the protein fraction of Merluccius bilinearis muscle was evaluated. The non-protein fraction increased progressively with corresponding decreases in the percentage ... -
Characterization of Brucella abortus and Brucella melitensis native haptens as outer membrane O-type polysaccharides independent from the smooth lipopolysaccharide
(American Society for Microbiology, 1996)Brucella native haptens (NHs) extracted with hot water from smooth (S)- type B. abortus and B. melitensis were purified to high levels of serological activity and compared with the polysaccharide obtained by acid hydrolysis ... -
Characterization of Brucella abortus lipopolysaccharide macrodomains as mega rafts
(Blackwell Science, 2005-09-28)The lipopolysaccharides (LPS) of intracellular Proteobacteria such as Brucella, Chlamydia, Legionella and Rickettsia, have properties distinct from enterobacterial LPSs. These properties include deficient LPS induction of ... -
Chlamydia psittaci
(Universidad Nacional, Costa Rica, 2020)El objetivo de este vídeo es presentar una breve explicación sobre la bacteria Chlamydia psittaci presente en aves, su forma de transmisión a humanos, presencia en Costa Rica, diagnóstico y las medidas de prevención. El ... -
Chromobacterium violaceum infection in a free ranging howler monkey in Costa Rica
(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 ... -
Cianobacterias bentónicas marinas en el Caribe central y sur de Costa Rica
(Universidad Nacional (Costa Rica), 2012-12)Las cianobacterias comprenden un grupo de microorganismos del dominio Bacteria (Woese et al. 1990) poco estudiado en Costa Rica. Los escasos trabajos realizados abordan temáticas relacionadas con la ocu-rrencia de ... -
Científicos estudian proceso de contagio de la Brucella
(Oficina de Comunicación, Universidad Nacional, 2020-11)Elías Barquero académico de la Escuela de Medicina Veterinaria (EMV) y Edgardo Moreno, profesor emérito de la Universidad Nacional (UNA), publicaron recientemente una investigación sobre el papel de ... -
Clostridium difficile: determinación de genotipos en suinos de Costa Rica
(Universidad Nacional, Costa Rica, 2017)Clostridium difficile es un enteropatógeno con amplia distribución geográfica e importancia a nivel clínico; su virulencia y resistencia a los antimicrobianos son actual objeto de estudio a nivel internacional. En animales, ... -
Comamonas testosteroni as the cause of mortality in embryonated chicken eggs of breeding broiler hens in Costa Rica
(Taylor and Francis Group, 2023-12)Mortality of chicken embryos andfirst-week chickens was reported in a commercial incubatorcompany in Costa Rica. Six 1-day-old Cobb chickens and twenty-four embryonated chickeneggs were examined in the Laboratory of Avian ... -
Combined electrokinetic manipulations of pathogenic bacterial samples in low-cost fabricated dielectrophoretic devices
(AIP Advances, 2019-11-13)A low-cost fabrication method of microfluidic devices with micrometer-sized constrictions used for electrodeless dielectrophoresis (eDEP) is demonstrated here. A structure on a commercial printed circuit board (PCB) ...