Conducng Polymer Nanocomposite–Based Membrane for Removal of Escherichia coli and Total Coliforms from Wastewater

2014 ◽  
pp. 235-260 ◽  
Keyword(s):  
Escherichia Coli ◽  
Polymer Nanocomposite ◽  
Total Coliforms

Bacteriophages reduce Escherichia coli O157:H7 levels in experimentally inoculated sheep

2009 ◽  
Vol 89 (2) ◽  
pp. 285-293 ◽  
Author(s):  
S J Bach ◽  
R P Johnson ◽  
K. Stanford ◽  
T A McAllister
Keyword(s):  
Escherichia Coli ◽  
Oral Administration ◽  
Coliform Bacteria ◽  
Escherichia Coli O157 ◽  
Fecal Shedding ◽  
Total Coliforms ◽  
E Coli ◽  
Oral Inoculation ◽  
Experimental Treatments ◽  
And Control

Bacteriophage biocontrol has potential as a means of mitigating the prevalence of Escherichia coli O157:H7 in ruminants. The efficacy of oral administration of bacteriophages for reducing fecal shedding of E. coli O157:H7 by sheep was evaluated using 20 Canadian Arcott rams (50.0 ± 3.0) housed in four rooms (n = 5) in a contained facility. The rams had ad libitum access to drinking water and a pelleted barley-based total mixed ration, delivered once daily. Experimental treatments consisted of administration of E. coli O157:H7 (O157), E. coli O157:H7+bacteriophages (O157+phage), bacteriophages (phage), and control (CON). Oral inoculation of the rams with 109 CFU of a mixture of four nalidixic acid-resistant strains of E. coli O157:H7 was performed on day 0. A mixture of 1010 PFU of bacteriophages P5, P8 and P11 was administered on days -2, -1, 0, 6 and 7. Fecal samples collected on 14 occasions over 21 d were analyzed for E. coli O157:H7, total E. coli, total coliforms and bacteriophages. Sheep in treatment O157+phage shed fewer (P < 0.05) E. coli O157:H7 than did sheep in treatment O157. Populations of total coliforms and total E. coli were similar (P < 0.05) among treatments, implying that bacteriophage lysis of non-target E. coli and coliform bacteria in the gastrointestinal tract did not occur. Bacteriophage numbers declined rapidly over 21 d, which likely reduced the chance of collision between bacteria and bacteriophage. Oral administration of bacteriophages reduced shedding of E. coli O157:H7 by sheep, but a delivery system that would protect bacteriophages during passage through the intestine may increase the effectiveness of this strategy as well as allow phage to be administered in the feed.Key words: Escherichia coli O157:H7, bacteriophage, sheep, environment, coliforms

Inactivation of Clostridium perfringens, Total Coliforms, and Escherichia coli by UV/H2O2 in Wastewater Treatment Plant Effluent

2016 ◽  
Vol 19 (1) ◽  
Author(s):  
José Roberto Guimarães ◽  
Regiane Aparecida Guadagnini ◽  
Regina Maura Bueno Franco ◽  
Luciana Urbano dos Santos
Keyword(s):  
Escherichia Coli ◽  
Wastewater Treatment ◽  
Clostridium Perfringens ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Total Coliforms ◽  
Wastewater Treatment Plant Effluent

AbstractThis study evaluated the effectiveness of H

Analytical limits of four β-glucuronidase and β-galactosidase-based commercial culture methods used to detect Escherichia coli and total coliforms

2008 ◽  
Vol 75 (3) ◽  
pp. 506-514 ◽  
Author(s):  
Andrée F. Maheux ◽  
Vicky Huppé ◽  
Maurice Boissinot ◽  
François J. Picard ◽  
Luc Bissonnette ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Commercial Culture ◽  
Culture Methods ◽  
Total Coliforms

Water quality assessment for beach balneability on the beach Beira Rio - Porto Nacional – TO / Avaliação da qualidade das águas para balneabilidade na praia Beira Rio – Porto Nacional – TO

2021 ◽  
Vol 7 (6) ◽  
pp. 55661-55670
Author(s):  
Ângelo Ricardo Balduino ◽  
Salomão Rodrigues De Castro Filho
Keyword(s):  
Escherichia Coli ◽  
Water Quality ◽  
Leisure Activities ◽  
Health And Safety ◽  
Water Quality Assessment ◽  
Microbiological Analysis ◽  
Total Coliforms ◽  
Safety Standards ◽  
Bathing Waters ◽  
Favorable Conditions

The Tocantins River has abundant water resources and favorable conditions for recreational activities, with emphasis on the beautiful natural beaches formed along its length. However, it is worth noting that the main contact entertainment and leisure activities require specific health and safety standards for bathing purposes. This study evaluated the water quality of Praia Beira Rio, in Porto Nacional-Tocantins, in only one point. For this purpose, microbiological analysis was performed using indicators of total coliforms and Escherichia coli (E. coli) following the method described by APHA (2005). The monitoring results were compared with the parameters for bathing purposes defined in CONAMA Resolution 274/00. To detect and identify total coliforms and Escherichia coli, the Colilert technique was used. The Escherichia coli content was low, allowing bathing waters to be classified as their own, according to CONAMA Resolution No. 274/00, and subdivided into the "excellent" category. Therefore, according to the bacterial indicators of the Escherichia coli group, during the analysis period, the waters of Praia Beira Rio were within the standards for primary contact recreation.

Analysis of Bottled Water for Escherichia coli and Total Coliforms

1998 ◽  
Vol 61 (3) ◽  
pp. 334-338 ◽  
Author(s):  
M. A. GRANT
Keyword(s):  
Escherichia Coli ◽  
Simultaneous Detection ◽  
Microbiological Quality ◽  
Bottled Water ◽  
Plate Count ◽  
Heterotrophic Plate Count ◽  
Positive Error ◽  
False Positive Error ◽  
Total Coliforms ◽  
Quality Guidelines

U.S. Food and Drug Administration regulations governing bottled water include microbiological quality guidelines based on coliform counts. Recently, a new MF medium for simultaneous detection of total coliforms and Escherichia coli was developed. This medium, m-ColiBlue24 (m-CB) was compared to m-Endo medium and an International Organization for Standardization standard coliform medium, lactose agar with Tergitol 7. Coliform analysis was conducted on 104 brands of bottled water from 10 countries. Some samples were additionally analyzed for heterotrophic plate count and Pseudomonas sp. populations, including P. aeruginosa. Presumptive coliform colonies were found in 5.8% of the samples with m-CB, 1.9% with m-Endo and 11.5% with lactose agar with Tergitol 7. None of the presumptive coliforms from any of the three media were verified as true coliforms in subsequent analysis. Consequently, the presumptive recovery rates actually represented false-positive error (FPE) rates. The FPE for m-CB and m-Endo were not statistically different (P &lt; 0.05) but the FPE for lactose agar with Tergitol 7 was significantly larger.

scholarly journals EU Drinking Water Directive reference methods for enumeration of total coliforms and Escherichia coli compared with alternative methods

2002 ◽  
Vol 34 (3) ◽  
pp. 227-231 ◽  
Author(s):  
F.M. Schets ◽  
P.J. Nobel ◽  
S. Strating ◽  
K.A. Mooijman ◽  
G.B. Engels ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Drinking Water ◽  
Alternative Methods ◽  
Total Coliforms ◽  
Reference Methods
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