Integron-mediated Multidrug Resistance in a Global Collection of Nontyphoidal Salmonella enterica Isolates

Krauland, Mary G.; Marsh, Jane W.; Paterson, David L.; Harrison, Lee H.

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Integron-mediated Multidrug Resistance in a Global Collection of Nontyphoidal Salmonella enterica Isolates

Supporting Files Public Domain

Mar 2009
By Krauland, Mary G. ; Marsh, Jane W. ; Paterson, David L. ; ...

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Alternative Title:

Emerg Infect Dis
Personal Author:

Krauland, Mary G. ; Marsh, Jane W. ; Paterson, David L. ; Harrison, Lee H.
Description:

Salmonella enterica bacteria have become increasingly resistant to antimicrobial agents, partly as a result of genes carried on integrons. Clonal expansion and horizontal gene transfer may contribute to the spread of antimicrobial drug-resistance integrons in these organisms. We investigated this resistance and integron carriage among 90 isolates with the ACSSuT phenotype (resistance to ampicillin, chloramphenicol, streptomycin, sulfamethoxazole, and tetracycline) in a global collection of S. enterica isolates. Four integrons, dfrA12/orfF/aadA2, dfrA1/aadA1, dfrA7, and arr2/blaOXA30/cmlA5/aadA2, were found in genetically unrelated isolates from 8 countries on 4 continents, which supports a role for horizontal gene transfer in the global dissemination of S. enterica multidrug resistance. Serovar Typhimurium isolates containing identical integrons with the gene cassettes blaPSE1 and aadA2 were found in 4 countries on 3 continents, which supports the role of clonal expansion. This study demonstrates that clonal expansion and horizontal gene transfer contribute to the global dissemination of antimicrobial drug resistance in S. enterica.
Subjects:

Anti-Bacterial Agents Bacterial Proteins Drug Resistance, Multiple, Bacterial Gene Transfer, Horizontal Global Health Humans Integrons Microbial Sensitivity Tests Polymerase Chain Reaction Research Salmonella Infections Salmonella Typhimurium Sequence Analysis, DNA Serotyping
Source:

Emerg Infect Dis. 15(3):388-396.
Document Type:

Journal Article
Volume:

15
Issue:

3
Collection(s):

Emerging Infectious Diseases
Main Document Checksum:

urn:sha256:684ee39037ba714d391ff282b9f9ca46e4f2dee67af037d726140c1c8dc50c9e
Download URL:

https://stacks.cdc.gov/view/cdc/17724/cdc_17724_DS1.pdf
File Type:

[PDF - 358.74 KB ]

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