Volume 17, Number 1—January 2011
Dispatch
CTX-M–producing Non-Typhi Salmonella spp. Isolated from Humans, United States
Maria Sjölund-Karlsson
, Rebecca Howie, Amy Krueger, Regan Rickert, Gary Pecic, Kathryn Lupoli, Jason P. Folster, and Jean M. Whichard
, Rebecca Howie, Amy Krueger, Regan Rickert, Gary Pecic, Kathryn Lupoli, Jason P. Folster, and Jean M. Whichard
Table
Characteristics of non-Typhi Salmonella isolates harboring blaCTX-M genes reported to the National Antimicrobial Resistance Monitoring System, United States, 2007*
| Isolate no. | Serotype | Submitting state | Resistance pattern | CTX MIC, mg/L | bla genes | qnr gene | Foreign travel association | Transferable |
|---|---|---|---|---|---|---|---|---|
| AM33608 | Typhimurium | SC | AMP, AUG, CHL, CTX, NAL, SUL, SXT, XNL | 64 | CTX-M-5, OXA-1 | – | ND | No |
| AM32667 | I 4,5,12:i:– | CT | AMP, CTX, XNL | 64 | CTX-M-55/57 | – | No | Yes |
| AM32764 | Concord | OR | AMP, CHL, CTX, GEN, STR, SUL, SXT, TET, XNL | 64 | CTX-M-15, SHV-12 | qnrA1 | Ethiopia | No |
*CTX, ceftriaxone; AMP, ampicillin; AUG, amoxicillin-clavulanic acid; CHL, chloramphenicol; NAL, nalidixic acid; SUL, sulfamethoxazole or sulfisoxazole; SXT, trimethoprim–sulfamethoxazole; XNL, ceftiofur; –, none detected; ND, not determined; GEN, gentamicin; STR, streptomycin; TET, tetracycline.
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