Prevalence and Molecular Characterization of Fluoroquinolone-Resistant Escherichia coli Isolated  from Diarrheic Cattle in Korea

Lim, Suk-Kyung; Lim, Keum-Gi; Lee, Heesoo; Jung, Suk-Chan; Kang, Mun Il; Nam, Hyang-Mi

doi:10.1292/jvms.08-0302

Cited by 8 publications

(10 citation statements)

References 18 publications

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“…Transport of pigs between these sites would result in a more widespread spreading of clones [28]. Likewise, in line with previous studies, E. coli may be transmitted from farm to farm by vehicles such as transport trucks and visitors on farms (truck drivers, veterinarians, producers, technicians) or by farm workers [29,30].…”

Section: Discussionsupporting

confidence: 61%

Dynamics of extended-spectrum cephalosporin resistance in pathogenic Escherichia coli isolated from diseased pigs in Quebec, Canada

Jahanbakhsh

Smith

Kohan-Ghadr

et al. 2016

International Journal of Antimicrobial Agents

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Section: Discussionsupporting

confidence: 61%

Dynamics of extended-spectrum cephalosporin resistance in pathogenic Escherichia coli isolated from diseased pigs in Quebec, Canada

Jahanbakhsh

Smith

Kohan-Ghadr

et al. 2016

International Journal of Antimicrobial Agents

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“…In this study, we found the same MLVA types on several farms, strongly indicating the clonal dissemination of QREC between farms. This is in line with the results of Lim et al (27) and Marchese et al (4). Farms located within a shorter distance from each other were also more likely to be contaminated with the same clone of QREC than farms located far apart.…”

Section: Discussionsupporting

confidence: 91%

“…Farms located within a shorter distance from each other were also more likely to be contaminated with the same clone of QREC than farms located far apart. Although the distances between farms in our study were much longer than those in the study of Lim et al (27), a similar pattern emerged. This was a rather rough and primitive method of investigating a genetic-geographic relationship, and more advanced analyses could yield more confident results.…”

Section: Discussionsupporting

confidence: 80%

Occurrence and Spread of Quinolone-Resistant Escherichia coli on Dairy Farms

Duse

Waller

Emanuelson

et al. 2016

Appl Environ Microbiol

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Quinolone-resistant Escherichia coli (QREC) is common in feces from young calves, but the prevalence and genetic diversity of QREC in groups of cattle of other ages and the farm environment are unknown. The aims of the study were to obtain knowledge about the occurrence of QREC on dairy farms, the genetic diversity of QREC within and between farms, and how these relate to the number of purchased animals and geographic distances between farms. We analyzed the within-sample prevalence of QREC in individual fecal samples from preweaned dairy calves and postpartum cows and in environmental samples from 23 Swedish dairy farms. The genetic diversity of the QREC isolates on 10 of these farms was assessed. In general, QREC was more prevalent in the dairy farm environment and in postpartum cows if QREC was commonly found in calves than if QREC was rare in calves. In particular, we found more QREC organisms in feed and water troughs and in environments that may come into contact with young calves. Thus, the results suggest that QREC circulates between cattle and the farm environment and that calves are important for the maintenance of QREC. Some genotypes of QREC were widespread both within and between farms, indicating that QREC has spread within the farms and likely also between farms, possibly through purchased animals. Farms that had purchased many animals over the years had greater within-farm diversity than farms with more closed animal populations. Finally, animals on more closely located farms were more likely to share the same genotype than animals on farms located far apart. IMPORTANCEThis study investigates the occurrence of a specific type of antimicrobial-resistant bacterium on dairy farms. It contributes to increased knowledge about the occurrence and spread of these bacteria, and the results pave the way for actions or further studies that could help mitigate the spread of these bacteria on dairy farms and in the community as a whole.

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“…livestock farms). Many previous studies on E. coli phylotype analyses have so far shown that the cross-contamination of phylotypes over a wide area frequently occurs as a result of animal transport (29, 42). The results of our study indicated that each phylotype was generally well conserved in each district.…”

Section: Discussionmentioning

confidence: 99%

Characterization of Multi-antibiotic-resistant <i>Escherichia coli</i> Isolated from Beef Cattle in Japan

et al. 2014

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The emergence of multiple-antibiotic-resistance bacteria is increasing, which is a particular concern on livestock farms. We previously isolated 1,347 antimicrobial-resistant (AMR) Escherichia coli strains from the feces of beef cattle on 14 Japanese farms. In the present study, the genetic backgrounds and phylogenetic relationships of 45 AMR isolates were characterized by the chromosome phylotype, AMR phenotype, AMR genotype, and plasmid type. These isolates were classified into five chromosome phylotypes, which were closely linked to the farms from which they were isolated, suggesting that each farm had its own E. coli phylotype. AMR phenotype and plasmid type analyses yielded 8 and 14 types, all of which were associated with the chromosomal phylotype and, thus, to the original farms. AMR genotype analysis revealed more variety, with 16 types, indicating both inter- and intra-farm diversity. Different phylotype isolates from the same farm shared highly similar plasmid types, which indicated that plasmids with AMR genes could be transferred between phylotypes, thereby generating multi-antibiotic-resistant microorganisms. This ecological study demonstrated that the chromosome phylotype was strongly correlated with the farm from which they were isolated, while the AMR phenotype, genotype, and plasmid type were generally correlated with the chromosome phylotype and farm source.

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Prevalence and Molecular Characterization of Fluoroquinolone-Resistant Escherichia coli Isolated from Diarrheic Cattle in Korea

Cited by 8 publications

References 18 publications

Dynamics of extended-spectrum cephalosporin resistance in pathogenic Escherichia coli isolated from diseased pigs in Quebec, Canada

Dynamics of extended-spectrum cephalosporin resistance in pathogenic Escherichia coli isolated from diseased pigs in Quebec, Canada

Occurrence and Spread of Quinolone-Resistant Escherichia coli on Dairy Farms

Characterization of Multi-antibiotic-resistant <i>Escherichia coli</i> Isolated from Beef Cattle in Japan

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