Volume 13, Number 10—October 2007
Dispatch
Multidrug-Resistant Salmonella Typhimurium, Pacific Northwest, United States
Table 1
Trends in resistance of bovine-origin Salmonella S. Typhimurium PFGE types TYP035 and TYP187*
Resistance characteristics† | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 |
---|---|---|---|---|---|---|
TYP035 | ||||||
ASu | 1 | 1 | 1 | |||
ACaz | 1 | |||||
AKSuT | 1 | 1 | ||||
AKSSuT | 7 | 7 | 1 | 4 | 1 | 4 |
ACKSSuT | 1 | 1 | ||||
AKSSuTCaz | 3 | |||||
AKSxtSSuT | 1 | |||||
ACKSSuTCaz | 2 | 2 | ||||
ACKSxtSSuT | 1 | |||||
AKSuTCaz | 1 | |||||
AKSSuTCaz | 1 | 1 | ||||
ACKSSuTCaz | 2 | 1 | ||||
ACKSxtSSuTCaz | 1 | 1 | 6 | 4 | ||
AGKSxtSSuTCaz |
1 |
|||||
Total |
8 |
10 |
5 |
17 |
12 |
8 |
TYP187 | ||||||
ACSSuTCaz | 1 | |||||
AKSSuTCaz | 1 | 12 | ||||
AKSuTCaz |
1 |
|||||
Total | 1 | 2 | 12 |
*PFGE, pulsed-field gel electrophoresis.
†A, ampicillin; Su, triple-sulfa; Caz, ceftazidime; K, kanamycin; T, tetracycline; S, streptomycin; C, chloramphenicol; Sxt, trimethoprim-sulfamethoxazole; G, gentamicin. In April 2005 nitrofurantoin, trimethoprim, and ciprofloxacin were dropped from the panel, and amoxicillin-clavulanic acid, nalidixic acid, and ceftazidime-clavulanic acid were added.