Uptake of Escherichia coli, Vibrio cholerae non-O1 and Enterococcus durans by, and depuration of mussels (Mytilus galloprovincialis)

2005 ◽  
Vol 99 (3) ◽  
pp. 281-286 ◽  
Author(s):  
Andreana Marino ◽  
Lida Lombardo ◽  
Caterina Fiorentino ◽  
Biancamaria Orlandella ◽  
Luis Monticelli ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Vibrio Cholerae ◽  
Mytilus Galloprovincialis ◽  
Enterococcus Durans

scholarly journals Vibrio cholerae Triggers SOS and Mutagenesis in Response to a Wide Range of Antibiotics: a Route towards Multiresistance

2011 ◽  
Vol 55 (5) ◽  
pp. 2438-2441 ◽  
Author(s):  
Zeynep Baharoglu ◽  
Didier Mazel
Keyword(s):  
Escherichia Coli ◽  
Antibiotic Resistance ◽  
Vibrio Cholerae ◽  
Fluorescent Protein ◽  
Resistance Development ◽  
Content Type ◽  
E Coli ◽  
Wide Range ◽  
Green Fluorescent ◽  
Regulated Promoters

ABSTRACTAntibiotic resistance development has been linked to the bacterial SOS stress response. InEscherichia coli, fluoroquinolones are known to induce SOS, whereas other antibiotics, such as aminoglycosides, tetracycline, and chloramphenicol, do not. Here we address whether various antibiotics induce SOS inVibrio cholerae. Reporter green fluorescent protein (GFP) fusions were used to measure the response of SOS-regulated promoters to subinhibitory concentrations of antibiotics. We show that unlike the situation withE. coli, all these antibiotics induce SOS inV. cholerae.

In Vitro Inhibition of the Growth of Salmonella typhimurium and Escherichia coli 0157:H7 by Bacteria Isolated from the Cecal Contents of Adult Chickens

1991 ◽  
Vol 54 (7) ◽  
pp. 496-501 ◽  
Author(s):  
ARTHUR HINTON ◽  
GEORGE E. SPATES ◽  
DONALD E. CORRIER ◽  
MICHAEL E. HUME ◽  
JOHN R. DELOACH ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Lactic Acid ◽  
Salmonella Typhimurium ◽  
Mixed Cultures ◽  
Enterococcus Durans ◽  
E Coli ◽  
Pure Cultures ◽  
In Vitro Inhibition ◽  
Lactic Acids

A Veillonella species and Enterococcus durans were isolated from the cecal contents of adult broilers. Mixed cultures of Veillonella and E. durans inhibited the growth of Salmonella typhimurium and Escherichia coli 0157:H7 on media containing 2.5% lactose (w/v). The growth of S. typhimurium or E. coli 0157:H7 was not inhibited by mixed cultures containing Veillonella and E. durans on media containing only 0.25% lactose or by pure cultures of Veillonella or E. durans on media containing either 0.25% or 2.5% lactose. The mixed cultures of Veillonella and E. durans produced significantly (P<0.05) more acetic, propionic, and lactic acids in media containing 2.5% lactose than in media containing 0.25% lactose. The inhibition of the enteropathogens was related to the production of lactic acid from lactose by the E. durans and the production of acetic and propionic acids from lactic acid by the Veillonella.

scholarly journals Evaluación de sales de cura (nitrito) y de los tratamientos físico-químico en la conservación de carne de concha Anadara tuberculosa; y su análisis microbiológico.

AKADEMOS ◽  
2017 ◽  
pp. 89-101
Author(s):  
Guillermo Antonio Bonilla Henríquez
Keyword(s):  
Escherichia Coli ◽  
Vibrio Cholerae ◽  
Salmonella Typhi ◽  
Para Determinar

Durante la investigación se midió el efecto del uso de sales de cura (nitrito a 200 ppm) y un tratamiento térmico a 70ºC por 3 minutos y 80ºC por 2 minutos para determinar la posibilidad de conservar las propiedades organolépticas y prolongas la vida de anaquel.Las pruebas microbiológicas presentaron resultados negativos en los análisis de Recuento total de bacterias, Coliformes, Coliformes fecales así como también respuestas negativas en los patógenos: Escherichia Coli, Salmonella typhi y Vibrio cholerae, indicando esto que los productos tratados no representan un peligro para la saludNo así las muestras que no fueron tratadas con ninguno de los métodos explicados donde su número más probable de bacterias fue de más de 1100 NMP/ml también un Recuento total de bacterias de 9.9 X10 4 UFC/ml, bacterias Coliformes 7.9X10 4 UFC/ml y Coliformes fecales 2.9X10 4 UFC/ml (Enterobacterias aerogenes) demostrando que una muestra “al fresco” de conchas representa un peligro para el consumidor. El análisis sensorial determinó que la Hipótesis Nula fue rechazada ya que el F Observado es mayor que el F Crítico por que este se encuentra en la zona de rechazo a un nivel de significancia del 5%. Esto demuestra que los tratamientos inciden de diferente manera sobre las muestras afectando sus propiedades sensoriales.AKADEMOS, Año 10, Vol. 2, No 27, Julio Diciembre 2016: 89-101

scholarly journals Antimicrobial activity of enterocin obtained from Enterococcus durans on Shiga-like toxin-producing Escherichia coli

2019 ◽  
Vol 49 (9) ◽  
Author(s):  
Natara Favaro Tosoni ◽  
Hugo Felix Perini ◽  
Márcia Regina Terra ◽  
Marly Sayuri Katsuda ◽  
Márcia Cristina Furlaneto ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Antimicrobial Activity ◽  
Foodborne Pathogens ◽  
Food Contamination ◽  
Alternative Methods ◽  
Cell Integrity ◽  
Enterococcus Durans ◽  
Time Points ◽  
Food Processes ◽  
Potential Use

ABSTRACT: Shiga-like toxin-producing Escherichia coli (STEC) is an important source of food contamination that presents risks to human health. Several industrial food processes eliminate this microorganism; however, these processes can alter the characteristics of the product. Alternative methods of preservation have been identified as an option to control these foodborne pathogens. The purpose of this study was to evaluate the action of bacteriocins produced by Enterococcus durans MF5 in STEC cells. Cell-free supernatant (CFS) containing enterocins from the MF5 isolate was tested over different time points (6, 18, and 24 h). Enterocins present in the crude CFS showed inhibition against STEC at all time points. In the investigation of cell integrity, using propidium iodide and fluorescence microscopy, considerable cell death was observed within 6 h of the cells being in contact with the enterocins, which was also observed at the 18 and 24 h time points. These results showed that the enterocins produced by the MF5 isolate have potential use in the control of STEC.

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