TY - JOUR AU - Roe, Matthew T. AU - Vega, Everardo AU - Pillai, Suresh D. T1 - Antimicrobial Resistance Markers of Class 1 and Class 2 Integron-bearing Escherichia coli from Irrigation Water and Sediments T2 - Emerging Infectious Disease journal PY - 2003 VL - 9 IS - 7 SP - 822 SN - 1080-6059 AB - 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. KW - Integrons KW - river KW - irrigation water KW - sediments KW - E. coli KW - phenotype KW - antimicrobial resistance KW - aminoglycoside KW - streptomycin KW - gene cassette KW - research KW - United States KW - Mexico DO - 10.3201/eid0907.020529 UR - https://wwwnc.cdc.gov/eid/article/9/7/02-0529_article ER - End of Reference