Antimicrobial Resistance Markers of Class 1 and Class 2 Integron-bearing Escherichia coli from Irrigation Water and Sediments

Details

• Alternative Title:
  Emerg Infect Dis
• Personal Author:
  Roe, Matthew T. ; Vega, Everardo ; Pillai, Suresh D.
• Description:
  Municipal and agricultural pollution affects the Rio Grande, a river that separates the United States from Mexico. Three hundred and twenty-two Escherichia coli isolates were examined for multiple antibiotic resistance phenotypes and the prevalence of class 1 and class 2 integron sequences. Thirty-two (10%) of the isolates were resistant to multiple antibiotics. Four (13%) of these isolates contained class 1-specific integron sequences; one isolate contained class 2 integron-specific sequences. Sequencing showed that the class 1 integron-bearing strain contained two distinct gene cassettes, sat-1 and aadA. Although three of the four class 1 integron-bearing strains harbored the aadA sequence, none of the strains was phenotypically resistant to streptomycin. These results suggest that integron-bearing E. coli strains can be present in contaminated irrigation canals and that these isolates may not express these resistance markers.
• Subjects:
  Anti-Bacterial Agents Drug Resistance, Bacterial Escherichia Coli Genetic Markers Geologic Sediments Phenotype Water Microbiology
• Source:
  Emerg Infect Dis. 9(7):822-826.
• Document Type:
  Journal Article
• Volume:
  9
• Issue:
  7
• Collection(s):
  Emerging Infectious Diseases
• Main Document Checksum:
  urn:sha256:d44292b5701ca2cfc114df83ab39ecadc6a50972b6edf6a97a266676c3e2d148
• Download URL:
  https://stacks.cdc.gov/view/cdc/14109/cdc_14109_DS1.pdf
• File Type:
  [PDF - 268.63 KB ]