Cited by 118Vibrio bacteria research studiesAntibiotic Resistance in BacteriaSalmonella and Campylobacter epidemiology

Distribution and Content of Class 1 Integrons in Different Vibrio cholerae O-Serotype Strains Isolated in Thailand

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Dalsgaard, Anders, Forslund, Anita, Serichantalergs, Oralak, Sandvang, Dorthe·2000·Antimicrobial Agents and Chemotherapy

Abstract

In this study, 176 clinical and environmental Vibrio cholerae strains of different O serotypes isolated in Thailand from 1982 to 1995 were selected and studied for the presence of class 1 integrons, a new group of genetic elements which carry antibiotic resistance genes. Using PCR and DNA sequencing, we found that 44 isolates contained class 1 integrons harboring the aadB , aadA2 , blaP1 , dfrA1 , and dfrA15 gene cassettes, which encode resistance to gentamicin, kanamycin, and tobramycin; streptomycin and spectinomycin; β-lactams; and trimethoprim, respectively. Each cassette array contained only a single antibiotic resistance gene. Although resistance genes in class 1 integrons were found in strains from the same epidemic, as well as in unrelated non-O1, non-O139 strains isolated from children with diarrhea, they were found to encode only some of the antibiotic resistance expressed by the strains. Serotype O139 strains did not contain class 1 integrons. However, the appearance and disappearance of the O139 serotype in the coastal city Samutsakorn in 1992 and 1993 were associated with the emergence of a distinct V. cholerae O1 strain which contained the aadA2 resistance gene cassette. A 150-kb self-transmissible plasmid found in three O1 strains isolated in 1982 contained the aadB gene cassette. Surprisingly, several strains harbored two integrons containing different cassettes. Thus, class 1 integrons containing various resistance gene cassettes are distributed among different V. cholerae O serotypes of mainly clinical origin in Thailand.

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Crossref · 10.1128/aac.44.5.1315-1321.2000

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Authors
Dalsgaard, A., Forslund, A., Serichantalergs, O., & Sandvang, D.
Affiliations
  • <!--label omitted: 1-->Department of Veterinary Microbiology, Royal Veterinary and Agricultural University, Frederiksberg, DK-1870 Frederiksberg C,1 and
  • Armed Forces Research Institute of Medical Science (TH)
Venue
Antimicrobial Agents and Chemotherapy
Published
2000-05
Volume
44
Issue
5
Pages
1315-1321
ISSN
  • 0066-4804 (ISSN-L)
  • 1098-6596
OpenAlex
W2141939691
Cited by
118
References
60
Citations by year
2026: 2 · 2024: 3 · 2023: 2 · 2022: 3 · 2021: 1 · 2020: 7 · 2019: 4 · 2018: 3 · 2017: 1 · 2016: 3 · 2015: 6 · 2014: 7 · 2013: 3 · 2012: 3
FWCI
3.76
Type
journal article
Language
en
Open access
Locations
  • Antimicrobial Agents and Chemotherapy (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Research at the University of Copenhagen (University of Copenhagen) (submittedVersion)
  • Technical University of Denmark, DTU Orbit (Technical University of Denmark, DTU) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Endocrinology › Vibrio bacteria research studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Medicine › Antibiotic Resistance in Bacteria
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Salmonella and Campylobacter epidemiology
Keywords
class 1 integron, Vibrio cholerae, O serotypes, antibiotic resistance genes, aadB, aadA2, dfrA1, serotype O1, self-transmissible plasmids, gene cassettes, clinical and environmental isolates, Thailand
MeSH terms
Animals, Anti-Bacterial Agents, Drug Resistance, Microbial, Environmental Microbiology, Food Contamination, Food Microbiology, Genes, Bacterial, Humans, Microbial Sensitivity Tests, Thailand, Vibrio cholerae, Seafood, Decapoda

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