Volume 7, Number 3—June 2001
Dispatch
Presence of Class I Integrons in Multidrug-Resistant, Low-Prevalence Salmonella Serotypes, Italy
Antonino Nastasi* and Caterina Mammina†
Table 2
Phenotypic and molecular characteristics of multidrug-resistant and class I integron carrying strains of Salmonella
| Serotype | Year and source of isolation | Resistance pattern | Plasmid pattern (mDa) | Integron sizes (kb) | Resistance pattern of recipient Escherichia coli | Integron sizes (kb) of E. coli |
|---|---|---|---|---|---|---|
| Derby | 1997 Human | Ap Cm Sm Su Tc Tp Gm | 120b | 2.0 | Ap Cm Sm Su Tc Tp | 2.0 |
| Newport | 1997 Human | Ap Cm Sm Su Tc Tp Gm | 120 | 2.0 | Ap Cm Sm Su Tc Tp | 2.0 |
| Paratyphi B | 1997 Tropical fishes | Ap Cm Sm Su Tc | 1.2, 1.0 | |||
| Saintpaul | 1997 Poultry | Ap Cm Sm Su Tc Tp | 120 | 1.8 | Ap Cm Sm Su Tc Tp | 1.8 |
| Sandiego | 1997 Poultry | Ap Cm Sm Su Tc Tp Kf | 1.4 | |||
| Anatum | 1998 Food (not specified) | Ap Sm Su Tc Tp F | 1.8 | |||
| Blockley | 1998 River water | Cm SmSu Tc Tp F Na | 1.8, 1.0 | |||
| Brandenburga | 1998 Human | Cm Sm Su Tc Tp | 120 | 1.0 | Cm Sm Su Tc Tp | 1.0 |
| Livingstone | 1998 River water | Ap Cm Sm Su Tc Tp | 120 | 1.8 | Ap Cm Sm Su Tc Tp | 1.8 |
| Ohio | 1998 River water | Ap Cm Sm Su Tc Tp | 120 | 1.8 | Ap Cm Sm Su Tc Tp | 1.8 |
| Ohio | 1998 Swine | Ap Sm Su Tc Tp | 120 | 1.6 | Ap Sm Su Tc Tp | 1.6 |
| Panama | 1998 Swine | Ap Cm Sm Su Tc Tp | 120 | 1.8 | Ap Cm Sm Su Tc Tp | 1.8 |
| Saintpaul | 1998 Human | Ap Cm Sm Su Tc Tp Kf | 140 | 1.8 | Ap Cm Sm Su Tc Tp | 1.8 |
| Anatum | 1999 Sewage | Ap Sm Su Tc Tp | 1.8 | |||
| Anatum | 1999 River water | Ap Su Tc Tp F | 1.8 | |||
| Anatum | 1999 River water | Su Tc Tp Na | < 0.1 | |||
| Blockley | 1999 Human | Cm Sm Su Tc F Na | < 0.1 | |||
| Brandenburg | 1999 Tropical fishes | Cm Su Tc Tp | 0.8, 0.2, <0.1 | |||
| Brandenburg | 1999 Tropical fishes | Cm Sm Su Tc Tp | 1.8 | |||
| Brandenburg | 1999 Poultry | Cm Sm Su Tc Tp Gm F Na | 120 | 1.8 | Cm Sm Su Tc Tp | 1.8 |
| Bredeney | 1999 Sewage | Sm Su Tc | 1.8, 1.0 | |||
| Derby | 1999 Sewage | Ap Sm Su Tc | 60, 35 | 1.0 | Ap | |
| Heidelberg | 1999 Human | Ap Sm Su Tc | 1.8, 1.0, 0.2 | |||
| Stanley | 1999 Tropical fishes | Cm Sm Su Tc Tp | 1.8, 1.0 |
aOutbreak strain.
bNumbers in bold indicate the approximate molecular size of self-transferable resistance plasmids.
