TABLE 2.
Salmonella enterica strains used for this study
| Strain | Serovar | Origin (year of isolation) | Source | Travel history | Resistance phenotypea | Resistance genesb |
|---|---|---|---|---|---|---|
| DT104-2 | Typhimurium | Australia (2001) | Human | Noc | Ap Cm Fl Sm Sp Su Tc | aadA2, blaP1, floRc, sul1, tet(G) |
| SRC49 | Paratyphi B dT+ | Australia (2001) | Human | No | Ap Cm Fl Sm Sp Su Tc | aadA2, blaP1, floRc, sul1, tet(G) |
| SRC19 | Emek | Australia (1999) | Effluent | Not applicable | Cm Fl Su Tc Tp Nx | dfrA1, cmlA9, sul1, tet(G) |
| SRC234 | Emek | Australia (2000) | Human | Overseas | Su Tp Nx | dfrA1, sul1 |
| SRC235 | Emek | Australia (2002) | Human | Thailand | Cm Fl Su Tc Tp Nx | dfrA1, cmlA9, sul1, tet(G) |
| SRC239d | Emek | United Kingdom (1999) | Human | Unknown | Cm Fl Su Tc Tp Nx | dfrA1, cmlA9, sul1, tet(G) |
a
Ap, ampicillin; Cm, chloramphenicol; Fl, florfenicol; Nx, nalidixic acid; Sm, streptomycin; Sp, spectinomycin; Su, sulfamethoxazole; Tc, tetracycline; Tp, trimethoprim.
b
The genes confer resistance as follows: aadA2, Sm and Sp; blaP, Ap; floR, Cm and Fl; dfrA1, Tp; sul1, Su; and tet(G), Tc.
c
Linked to consumption of imported food.
d
Isolated at the Laboratory for Enteric Pathogens, Health Protection Agency, London, United Kingdom.