scholarly journals Plasmid-mediated quinolone resistance in Escherichia coli isolates from commercial broiler chickens and selection of fluoroquinolone-resistant mutants

2019 ◽  
Vol 98 (11) ◽  
pp. 5900-5907 ◽  
Author(s):  
Ryo Nishikawa ◽  
Toshiyuki Murase ◽  
Hiroichi Ozaki
Keyword(s):  
Escherichia Coli ◽  
Broiler Chickens ◽  
Quinolone Resistance ◽  
Commercial Broiler ◽  
Resistant Mutants ◽  
Selection Of

scholarly journals Efficacy of Ciprofloxacin in an Experimental Model of Escherichia coli Chorioamnionitis in Rabbits

2009 ◽  
Vol 53 (4) ◽  
pp. 1624-1627 ◽  
Author(s):  
Elise Launay ◽  
Nicolas Joram ◽  
Cédric Jacqueline ◽  
Anne Francoise Miegeville ◽  
Jocelyne Caillon ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Survival Rate ◽  
Experimental Model ◽  
Resistant Mutants ◽  
Selection Of

ABSTRACT Pregnant rabbits were treated with ciprofloxacin alone or with gentamicin in a model of Escherichia coli chorioamnionitis, and the results were compared with those for untreated rabbits. The survival rate increased and the bacteremia decreased significantly in treated fetuses in comparison to controls (P = 0.003). Nevertheless, rapid selection of resistant mutants is a major limit to ciprofloxacin applications.

scholarly journals Influence of Inoculum Size on the Selection of Resistant Mutants of Escherichia coli in Relation to Mutant Prevention Concentrations of Marbofloxacin

2007 ◽  
Vol 51 (11) ◽  
pp. 4163-4166 ◽  
Author(s):  
Aude Ferran ◽  
Véronique Dupouy ◽  
Pierre-Louis Toutain ◽  
Alain Bousquet-Mélou
Keyword(s):  
Escherichia Coli ◽  
Bacterial Population ◽  
Inoculum Size ◽  
Pharmacodynamic Model ◽  
Initial Size ◽  
Mutant Selection ◽  
Selection Window ◽  
Resistant Mutants ◽  
Selection Of

ABSTRACT We demonstrate using an in vitro pharmacodynamic model that the likelihood of selection of Escherichia coli mutants resistant to a fluoroquinolone was increased when the initial size of the bacterial population, exposed to fluoroquinolone concentrations within the mutant selection window, was increased.

scholarly journals Pathogenicity of Escherichia coli O125 in commercial broiler chickens

2019 ◽  
Vol 26 (1) ◽  
pp. 1-8
Author(s):  
Asmaa Abd Elatiff ◽  
Azza A. El-Sawah ◽  
Mohamed M. Amer ◽  
Al-Hussein M. Dahshan ◽  
Hala Salam ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Broiler Chickens ◽  
Commercial Broiler

scholarly journals mcr-1 facilitated selection of high-level colistin-resistant mutants in Escherichia coli

2019 ◽  
Vol 25 (4) ◽  
pp. 517.e1-517.e4 ◽  
Author(s):  
H. Zhang ◽  
D. Zhao ◽  
J. Quan ◽  
X. Hua ◽  
Y. Yu
Keyword(s):  
Escherichia Coli ◽  
Resistant Mutants ◽  
High Level ◽  
Selection Of

scholarly journals Pathogenicity of Escherichia coli O157 in commercial broiler chickens

2018 ◽  
Vol 7 (4) ◽  
pp. 620-625 ◽  
Author(s):  
Azza A. EL-Sawah ◽  
AL Hussien M. Dahshan ◽  
El-Shaymaa El-Nahass ◽  
A.I. Abd El-Mawgoud
Keyword(s):  
Escherichia Coli ◽  
Broiler Chickens ◽  
Escherichia Coli O157 ◽  
Commercial Broiler

scholarly journals Replicated Divergent Selection of Broiler Chickens for High or Low Early Antibody Response to Escherichia coli Vaccination

1992 ◽  
Vol 71 (1) ◽  
pp. 27-37 ◽  
Author(s):  
GABRIEL LEITNER ◽  
ZAHAVA UNI ◽  
AVIGDOR CAHANER ◽  
MICHAL GUTMAN ◽  
E. DAN HELLER
Keyword(s):  
Escherichia Coli ◽  
Antibody Response ◽  
Broiler Chickens ◽  
Divergent Selection ◽  
Selection Of

Comparison of an Automated Most-Probable-Number Technique with Traditional Plating Methods for Estimating Populations of Total Aerobes, Coliforms, and Escherichia coli Associated with Freshly Processed Broiler Chickens

2011 ◽  
Vol 74 (9) ◽  
pp. 1558-1563 ◽  
Author(s):  
J. E. LINE ◽  
N. J. STERN ◽  
B. B. OAKLEY ◽  
B. S. SEAL
Keyword(s):  
Escherichia Coli ◽  
Correlation Coefficient ◽  
Broiler Chickens ◽  
Limit Of Detection ◽  
Viable Count ◽  
Drip Line ◽  
Most Probable Number ◽  
Bacterial Populations ◽  
Probable Number ◽  
Commercial Broiler

An instrument (TEMPO) has been developed to automate the most-probable-number (MPN) technique and reduce the effort required to estimate some bacterial populations. We compared the automated MPN technique with traditional microbiological plating methods and Petrifilm methods for estimating the total viable count of aerobic microorganisms (TVC), total coliforms (CC), and Escherichia coli populations (EC) on freshly processed broiler chicken carcasses (postchill whole carcass rinse [WCR] samples) and cumulative drip-line samples from a commercial broiler processing facility. Overall, 120 broiler carcasses, 36 prechill drip-line samples, and 40 postchill drip-line samples were collected over 5 days (representing five individual flocks) and analyzed by the automated MPN and direct agar plating and Petrifilm methods. The TVC correlation coefficient between the automated MPN and traditional methods was very high (0.972) for the prechill drip samples, which had mean log-transformed values of 3.09 and 3.02, respectively. The TVC correlation coefficient was lower (0.710) for the postchill WCR samples, which had lower mean log values of 1.53 and 1.31, respectively. Correlations between the methods for the prechill CC and EC samples were 0.812 and 0.880, respectively. The estimated number of total aerobes was generally greater than the total number of coliforms or E. coli recovered for all sample types (P < 2e−16). Significantly more bacteria were recovered from the prechill samples than from the postchill WCR or cumulative drip samples (P < 9.5e−12 and P < 2e−16, respectively). When samples below the limit of detection were excluded, 92.1% of the total responses were within a single log difference between the traditional plating or Petrifilm methods and the automated MPN method.

scholarly journals In Vitro Development of Resistance to Six and Four Fluoroquinolones in Mycoplasma pneumoniae and Mycoplasma hominis, Respectively

2005 ◽  
Vol 49 (3) ◽  
pp. 1190-1193 ◽  
Author(s):  
D. Gruson ◽  
S. Pereyre ◽  
H. Renaudin ◽  
A. Charron ◽  
C. Bébéar ◽  
...  
Keyword(s):  
Mycoplasma Pneumoniae ◽  
Reference Strain ◽  
Mycoplasma Hominis ◽  
Quinolone Resistance ◽  
In Vitro Development ◽  
Development Of Resistance ◽  
Resistant Mutants ◽  
Vitro Development ◽  
Selection Of

ABSTRACT Selection of resistant mutants in sequential subcultures with increasing concentrations of six and four different fluoroquinolones was studied for one reference strain each of Mycoplasma pneumoniae and Mycoplasma hominis, respectively. All fluoroquinolones tested selected for resistance, with alterations affecting the quinolone resistance-determining regions of the four target topoisomerase genes.

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