Temas
Mostrando ítems 1-20 de 27
-
An inhibitory mechanism of action of coiled‐coil peptides against type three secretion system from enteropathogenic Escherichia coli
(Wiley, 2019-03)Human pathogenic gram‐negative bacteria, such as enteropathogenic Escherichia coli (EPEC), rely on type III secretion systems (T3SS) to translocate virulence factors directly into host cells. The coiled‐coil domains present ... -
Characterization of Escherichia coli carrying mcr-1-plasmids recovered from food animals from Argentina
(Frontiers Media, 2019-03)In this study, we found mcr-1.1 and mcr-1.5 genes carried by IncI2 plasmids in a subset of Escherichia coli isolates recovered from commercial broiler farms in Argentina. The comparative analysis of the sequences of these ... -
Combination of organic acids and low-dose gamma irradiation as antimicrobial treatment to inactivate Shiga toxin-producing Escherichia coli inoculated in beef trimmings: Lack of benefits in relation to single treatments
(Plos ONE, 2020-03-26)The aim of this study was to assess the efficacy of lactic acid (LA), caprylic acid (CA), high- (HDI) and low- (LDI) dose gamma irradiation and LDI combined with LA or CA on the inactivation of a pool of Shiga toxin-producing ... -
Early immune innate hallmarks and microbiome changes across the gut during Escherichia coli O157: H7 infection in cattle
(SpringerNature, 2020-12)The zoonotic enterohemorrhagic Escherichia coli (EHEC) O157: H7 bacterium causes diarrhea, hemorrhagic colitis, and hemolytic uremic syndrome (HUS) in humans. Cattle are primary reservoirs and EHEC O157: H7; the bacteria ... -
Effects of High Hydrostatic Pressure and Beef Patty Formulations on the Inactivation of Native Strains of Shiga Toxin-Producing Escherichia coli O157:H7
(Springer, 2021-04-08)This study aimed to evaluate the effects of beef patty formulations and pressure levels on the inactivation of spoilage microbiota and native Shiga toxin-producing Escherichia coli (STEC) O157:H7. Beef patties were made ... -
Efficacy of a recombinant Intimin, EspB and Shiga toxin 2B vaccine in calves experimentally challenged with Escherichia coli O157:H7
(Elsevier, 2018-06)Escherichia coli O157:H7 is a zoonotic pathogen of global importance and the serotype of Shiga toxin-producing E. coli (STEC) most frequently associated with Hemolytic Uremic Syndrome (HUS) in humans. The main STEC reservoir ... -
Enterohemorrhagic Escherichia coli O157:H7 antigens produced in transgenic lettuce effective as an oral vaccine in mice
(Springer, 2023-10)Enterohemorrhagic Escherichia coli (EHEC) O157:H7 is a food-borne pathogen where ruminant farm animals, mainly bovine, serve as reservoirs. Bovine vaccination has been used to prevent disease outbreaks, and the current ... -
Epidemiological characterization of isolates of Salmonella enterica and shiga toxin-producing Escherichia coli from backyard production system animals in the Valparaíso and metropolitana regions
(MDPI, 2023-08)Backyard production systems (BPS) are distributed worldwide, rearing animals recognized as reservoirs of Salmonella enterica and Shiga toxin-producing Escherichia coli (STEC), both zoonotic pathogens. The aim of this study ... -
Estrategias de intervención para mitigar el impacto de Escherichia coli productor de toxina Shiga en la cadena cárnica bovina.
(Facultad de Ciencias Veterinarias, Universidad de Buenos Aires, 2021)Shiga toxin-producing Escherichia coli (STEC) are foodborne pathogens that can cause bloody diarrhea, hemorrhagic colitis and hemolytic uremic syndrome. The meat contaminated with STEC impacts on the public health due to ... -
Estudio y evaluación de la dinámica de resistencia a cefalosporinas y fluoroquinolonas en Salmonella spp. y Escherichia coli en animales de producción
(Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, 2016)El alarmante incremento de la resistencia bacteriana a los antimicrobianos (ATM) es sin duda, uno de los mayores problemas actuales de la salud pública. Estos compuestos constituyen una de las principales herramientas para ... -
Evaluación de proteínas de una isla de patogenicidad y de envolturas bacterianas de Escherichia coli 0157:H7 como vacunas para reducir su incidencia en bovinos
(Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, 2015-11)Escherichia coli enterohemorrágico (EHEC) es un patógeno que puede causar diarrea, colitis hemorrágica, y síndrome urémico hemolítico (SUH), una enfermedad sistémica grave que afecta principalmente a los niños. En Argentina ... -
Evaluation of PMA‐qPCR methodology to detect and quantify viable Shiga toxin‐producing Escherichia coli in beef burgers
(2021-02-06)Propidium monoazide (PMA) is a selective nucleic acid intercalating dye that can be combined with real‐time PCR (qPCR) in order to evaluate cell viability in food samples. The aim of the present work was to evaluate PMA‐qPCR ... -
Genetic features of human and bovine Escherichia coli O157: H7 strains isolated in Argentina
(2016-02-15)Shiga toxin-producing Escherichia coli (STEC) are important food-borne pathogens associated with human diseases. In Argentina, O157:H7 is the dominant serotype in hemolytic uremic syndrome (HUS) cases. Previously, we have ... -
Genotypic Characterization of Non-O157 Shiga Toxin–Producing Escherichia coli in Beef Abattoirs of Argentina
(2011-12)The non-O157 Shiga toxin–producing Escherichia coli (STEC) contamination in carcasses and feces of 811 bovines in nine beef abattoirs from Argentina was analyzed during a period of 17 months. The feces of 181 (22.3%) bovines ... -
High pressure treatments combined with sodium lactate to inactivate Escherichia coli O157:H7 and spoilage microbiota in cured beef carpaccio
(2015-04)High-pressure treatments (400 and 600 MPa) combined with the addition of sodium lactate (1 and 3%) were tested to reduce Escherichia coli O157:H7 (STEC O157) and spoilage microbiota contamination in a manufactured cured ... -
High-pressure processing treatment of beef burgers: Effect on Escherichia coli O157 inactivation evaluated by plate count and PMA-qPCR
(Wiley, 2022-04-20)Propidium monoazide coupled to real time PCR (PMA-qPCR) is a novel methodology proposed for the quantification of viable bacteria in food after microbial inactivation treatments. The aim of this work was to assess the ... -
Identification of the gamma irradiation dose applied to ground beef that reduces Shiga toxin producing Escherichia coli but has no impact on consumer acceptance
(Elsevier, 2020-11-18)The aims of the present study were: a) to estimate the minimal dose of gamma irradiation required to reduce 5 log CFU/g of native O157 and non-O157 Shiga toxin-producing Escherichia coli population in ground beef samples ... -
Inactivation of Shiga toxin-producing Escherichia coli in fresh beef by electrolytically-generated hypochlorous acid, peroxyacetic acid, lactic acid and caprylic acid
(Elsevier, 2019-07-05)Several studies have been conducted to verify the decontamination potential of electrolyticallygenerated hypochlorous acid, peroxyacetic acid, lactic acid and caprylic acid against Shiga toxin-producing Escherichia coli ... -
The intranasal vaccination of pregnant dams with Intimin and EspBconfers protection in neonatal mice from Escherichia coli (EHEC)O157:H7 infection
(2016-05)Enterohemorrhagic Escherichia coli (EHEC) O157:H7 is responsible for intestinal disease and hemolytic uremic syndrome (HUS), a serious systemic complication which particularly affects children. In this study, we evaluated ...