TABLE 1.

Characteristics of the Salmonella strains and their transconjugants producing TEM-52 used in this study

StrainaSerovarGeographic originAnimal or human originYr of isolationAntibiotic resistance profilebMIC (μg/ml)cSGI1 variantd
XnlCro
777SA01AgonaBelgiumPoultry2001Ap(Caz)CfCm(Cro)FfSmSpSuTcTm(Xnl)1616SGI1-A
777SA01TC1Ap(Caz)Cf(Cro)(Xnl)42
260SA04AgonaBelgiumPoultry2004ApCazCfCmCroFfSmSuTcTmXnl64256
260SA04TC1Ap(Caz)Cf(Cro)(Xnl)21
833SA04AgonaBelgiumPoultry2004ApCazCfCroXnl3264
833SA04TC1Ap(Caz)Cf(Cro)(Xnl)21
977SA01DerbyBelgiumPoultry2001ApCazCfCroXnl3216
977SA01TC1Ap(Caz)Cf(Cro)(Xnl)44
988SA01InfantisBelgiumPoultry2001ApCazCfCroXnl3232
988SA01TC1Ap(Caz)Cf(Cro)(Xnl)21
2004/10101InfantisBelgiumPoultry2004ApCazCfCroXnl32128
2004/10101TC1Ap(Caz)Cf(Cro)(Xnl)24
2004/10256InfantisBelgiumPoultry2004ApCazCfCroXnl3264
2004/10256TC1Ap(Caz)Cf(Cro)(Xnl)22
05-00001InfantisBelgiumHuman2005ApCazCfCroXnl3264
05-00001TC1Ap(Caz)Cf(Cro)(Xnl)44
05-00590InfantisBelgiumHuman2005ApCazCfCroXnl3264
05-00590TC1Ap(Caz)Cf(Cro)(Xnl)24
05-00838InfantisBelgiumHuman2005ApCazCfCroXnl1664
05-00838TC1Ap(Caz)Cf(Cro)(Xnl)44
1043SA04Paratyphi BBelgiumPoultry2004ApCazCfCroSmSpSuTmXnl3264
1043SA04TC1Ap(Caz)Cf(Cro)(Xnl)44
153SA02TyphimuriumBelgiumPoultry2002ApCazCfCroSmSpSuTmXnl3232
153SA02TC1Ap(Caz)Cf(Cro)(Xnl)21
04-3486TyphimuriumFranceHuman2004ApCazCfCm(Cro)FfSmSpSuTc(Xnl)1632SGI1
04-3486TC1Ap(Caz)Cf(Cro)(Xnl)22
  • 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.