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Volume 16, Number 11—November 2010

Dispatch

Plasmid-mediated Quinolone Resistance among Non-TyphiSalmonella enterica Isolates, USA

Maria Sjölund-KarlssonComments to Author , Rebecca Howie, Regan Rickert, Amy Krueger, Thu-Thuy Tran, Shaohua Zhao, Takiyah Ball, Jovita Haro, Gary Pecic, Kevin Joyce, Paula J. Fedorka-Cray, Jean M. Whichard, and Patrick F. McDermott
Author affiliations: Centers for Disease Control and Prevention, Atlanta, Georgia, USA (M. Sjölund-Karlsson, K. Joyce, J.M. Whichard); IHRC, Inc., Atlanta (R. Howie, G. Pecic); Atlanta Research and Education Foundation, Decatur, Georgia, USA (R. Rickert, A. Krueger); Food and Drug Administration, Laurel, Maryland, USA (T.-T. Tran, S. Zhao, P.F. McDermott); US Department of Agriculture, Athens, Georgia (T. Ball, J. Haro, P.J. Fedorka-Cray)

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Table

Characteristics of non-Typhi Salmonella enterica isolates harboring qnr or the aac(6′)-Ib-cr gene, collected through NARMS, 2007*

Isolate no. S. enterica serovar Submitting site Resistance phenotype Ciprofloxacin MIC, mg/L aac6′Ib/qnr variant
AM31035 Thompson NY AMP, SUL 0.5 aac(6′)-Ib-cr
AM30827 Typhimurium CA STR, SUL, TET 0.5 qnrS1
AM31228 Corvallis VA ND 0.5 qnrS1
AM33914 Typhimurium NC ND 0.5 qnrS1
AM31434 Enteritidis LX SUL, SXT, TET 0.25 qnrB2
AM33097 Beaudesert CA ND 0.25 qnrB19

*NARMS, National Antimicrobial Resistance Monitoring System; NY, New York; AMP, ampicillin; SUL, sulfamethoxazole or sulfisoxazole; CA, California; STR, streptomycin; TET, tetracycline; VA, Virginia; ND, none detected; NC, North Carolina; LX, Los Angeles; SXT, trimethoprim/sulfamethoxazole.

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