Antibiotic-Resistant Enterococcus faecalis in Abattoir Pigs and Plasmid Colocalization and Cotransfer of tet(M) and erm(B) Genes

This study was conducted to determine plasmid colocalization and transferability of both erm(B) and tet(M) genes in Enterococcus faecalis isolates from abattoir pigs in Canada. A total of 124 E. faecalis isolates from cecal contents of abattoir pigs were examined for antibiotic susceptibility. High...

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Veröffentlicht in:Journal of food protection 2012-09, Vol.75 (9), p.1595-1602
Hauptverfasser: TREMBLAY, Cindy-Love, LETELLIER, Ann, QUESSY, Sylvain, DAIGNAULT, Danielle, ARCHAMBAULT, Marie
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container_issue 9
container_start_page 1595
container_title Journal of food protection
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creator TREMBLAY, Cindy-Love
LETELLIER, Ann
QUESSY, Sylvain
DAIGNAULT, Danielle
ARCHAMBAULT, Marie
description This study was conducted to determine plasmid colocalization and transferability of both erm(B) and tet(M) genes in Enterococcus faecalis isolates from abattoir pigs in Canada. A total of 124 E. faecalis isolates from cecal contents of abattoir pigs were examined for antibiotic susceptibility. High percentages of resistance to macrolides and tetracyclines were found. Two predominant multiresistance patterns of E. faecalis were examined by PCR and sequencing for the presence of genes encoding antibiotic resistance. Various combinations of antibiotic resistance genes were detected; erm(B) and tet(M) were the most common genes. Plasmid profiling and hybridization revealed that both genes were colocated on a ~9-kb transferable plasmid in six strains with the two predominant multiresistant patterns. Plasmid colocalization and cotransfer of tet(M) and erm(B) genes in porcine E. faecalis isolates indicates that antibiotic coselection and transferability could occur via this single genetic element. To our knowledge, this is the first report on plasmid colocalization and transferability of erm(B) and tet(M) genes in E. faecalis on a mobile genetic element of ~9 kb. Physical linkage between important antibiotic resistance determinants in enterococci is of interest for predicting potential transfer to other bacterial genera.
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A total of 124 E. faecalis isolates from cecal contents of abattoir pigs were examined for antibiotic susceptibility. High percentages of resistance to macrolides and tetracyclines were found. Two predominant multiresistance patterns of E. faecalis were examined by PCR and sequencing for the presence of genes encoding antibiotic resistance. Various combinations of antibiotic resistance genes were detected; erm(B) and tet(M) were the most common genes. Plasmid profiling and hybridization revealed that both genes were colocated on a ~9-kb transferable plasmid in six strains with the two predominant multiresistant patterns. Plasmid colocalization and cotransfer of tet(M) and erm(B) genes in porcine E. faecalis isolates indicates that antibiotic coselection and transferability could occur via this single genetic element. To our knowledge, this is the first report on plasmid colocalization and transferability of erm(B) and tet(M) genes in E. faecalis on a mobile genetic element of ~9 kb. 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A total of 124 E. faecalis isolates from cecal contents of abattoir pigs were examined for antibiotic susceptibility. High percentages of resistance to macrolides and tetracyclines were found. Two predominant multiresistance patterns of E. faecalis were examined by PCR and sequencing for the presence of genes encoding antibiotic resistance. Various combinations of antibiotic resistance genes were detected; erm(B) and tet(M) were the most common genes. Plasmid profiling and hybridization revealed that both genes were colocated on a ~9-kb transferable plasmid in six strains with the two predominant multiresistant patterns. Plasmid colocalization and cotransfer of tet(M) and erm(B) genes in porcine E. faecalis isolates indicates that antibiotic coselection and transferability could occur via this single genetic element. To our knowledge, this is the first report on plasmid colocalization and transferability of erm(B) and tet(M) genes in E. faecalis on a mobile genetic element of ~9 kb. Physical linkage between important antibiotic resistance determinants in enterococci is of interest for predicting potential transfer to other bacterial genera.</abstract><cop>Des Moines, IA</cop><pub>International Association for Food Protection</pub><pmid>22947466</pmid><doi>10.4315/0362-028X.JFP-12-047</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record>
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subjects Abattoirs
Animal productions
Animals
Anti-Bacterial Agents - pharmacology
Antibiotic resistance
Antibiotics
Bacteria
Bacterial Proteins - genetics
Biological and medical sciences
Canada - epidemiology
Cecum
Drug resistance
Drug Resistance, Multiple, Bacterial - genetics
Enterococcus faecalis
Enterococcus faecalis - drug effects
Enterococcus faecalis - genetics
Enterococcus faecalis - isolation & purification
Food contamination & poisoning
Food industries
Food Microbiology
Food safety
Fundamental and applied biological sciences. Psychology
Gene Transfer, Horizontal
Genes
Genes, Bacterial
Gram-positive bacteria
Hogs
Microbial Sensitivity Tests
Plasmids
Polymerase chain reaction
Studies
Swine
Swine - microbiology
Terrestrial animal productions
Tetracyclines
Vertebrates
title Antibiotic-Resistant Enterococcus faecalis in Abattoir Pigs and Plasmid Colocalization and Cotransfer of tet(M) and erm(B) Genes
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