TABLE 1.
Characteristics of the Salmonella strains and their transconjugants producing TEM-52 used in this study
| Straina | Serovar | Geographic origin | Animal or human origin | Yr of isolation | Antibiotic resistance profileb | MIC (μg/ml)c
|
SGI1 variantd | |
|---|---|---|---|---|---|---|---|---|
| Xnl | Cro | |||||||
| 777SA01 | Agona | Belgium | Poultry | 2001 | Ap(Caz)CfCm(Cro)FfSmSpSuTcTm(Xnl) | 16 | 16 | SGI1-A |
| 777SA01TC1 | Ap(Caz)Cf(Cro)(Xnl) | 4 | 2 | |||||
| 260SA04 | Agona | Belgium | Poultry | 2004 | ApCazCfCmCroFfSmSuTcTmXnl | 64 | 256 | — |
| 260SA04TC1 | Ap(Caz)Cf(Cro)(Xnl) | 2 | 1 | |||||
| 833SA04 | Agona | Belgium | Poultry | 2004 | ApCazCfCroXnl | 32 | 64 | — |
| 833SA04TC1 | Ap(Caz)Cf(Cro)(Xnl) | 2 | 1 | |||||
| 977SA01 | Derby | Belgium | Poultry | 2001 | ApCazCfCroXnl | 32 | 16 | — |
| 977SA01TC1 | Ap(Caz)Cf(Cro)(Xnl) | 4 | 4 | |||||
| 988SA01 | Infantis | Belgium | Poultry | 2001 | ApCazCfCroXnl | 32 | 32 | — |
| 988SA01TC1 | Ap(Caz)Cf(Cro)(Xnl) | 2 | 1 | |||||
| 2004/10101 | Infantis | Belgium | Poultry | 2004 | ApCazCfCroXnl | 32 | 128 | — |
| 2004/10101TC1 | Ap(Caz)Cf(Cro)(Xnl) | 2 | 4 | |||||
| 2004/10256 | Infantis | Belgium | Poultry | 2004 | ApCazCfCroXnl | 32 | 64 | — |
| 2004/10256TC1 | Ap(Caz)Cf(Cro)(Xnl) | 2 | 2 | |||||
| 05-00001 | Infantis | Belgium | Human | 2005 | ApCazCfCroXnl | 32 | 64 | — |
| 05-00001TC1 | Ap(Caz)Cf(Cro)(Xnl) | 4 | 4 | |||||
| 05-00590 | Infantis | Belgium | Human | 2005 | ApCazCfCroXnl | 32 | 64 | — |
| 05-00590TC1 | Ap(Caz)Cf(Cro)(Xnl) | 2 | 4 | |||||
| 05-00838 | Infantis | Belgium | Human | 2005 | ApCazCfCroXnl | 16 | 64 | — |
| 05-00838TC1 | Ap(Caz)Cf(Cro)(Xnl) | 4 | 4 | |||||
| 1043SA04 | Paratyphi B | Belgium | Poultry | 2004 | ApCazCfCroSmSpSuTmXnl | 32 | 64 | — |
| 1043SA04TC1 | Ap(Caz)Cf(Cro)(Xnl) | 4 | 4 | |||||
| 153SA02 | Typhimurium | Belgium | Poultry | 2002 | ApCazCfCroSmSpSuTmXnl | 32 | 32 | — |
| 153SA02TC1 | Ap(Caz)Cf(Cro)(Xnl) | 2 | 1 | |||||
| 04-3486 | Typhimurium | France | Human | 2004 | ApCazCfCm(Cro)FfSmSpSuTc(Xnl) | 16 | 32 | SGI1 |
| 04-3486TC1 | Ap(Caz)Cf(Cro)(Xnl) | 2 | 2 | |||||
a
Strains labeled with TC1 are E. coli transconjugant strains.
b
Antibiotics: Ap, ampicillin; Caz, ceftazidime; Cf, cefalothin; Cm, chloramphenicol; Cro, ceftriaxone; Ff, florfenicol; Sm, streptomycin; Sp, spectinomycin; Su, sulfonamide; Tc, tetracycline; Tm, trimethoprim; Xnl, ceftiofur. Parentheses indicate intermediate resistance according to the breakpoints of the CA-SFM (Comité de l'Antibiogramme de la Société Française de Microbiologie) for Enterobacteriaceae (i.e., susceptible, >20 mm; resistant, <15 mm).
c
Cro, ceftriaxone; Xnl, ceftiofur.
d
—, negative for SGI1.