TABLE 4.
β-Lactamases produced by 104 penicillinase-producing P. mirabilis strains
| pI (n) | ASPCR position 39
|
ASPCR promoter
|
β-Lactamase(s) (promoter), n | ||
|---|---|---|---|---|---|
| Gln | Lys | P3 | Pa + Pb | ||
| Low level (n = 23) | |||||
| 5.4 (21) | + | − | + | − | TEM-1 (P3), 20 |
| + | − | − | + | TEM-1 (Pa + Pb), 1 | |
| 5.7 (1) | − | − | NDa | ND | CARB-2 (PSE-1), 1 |
| 7.7 (1) | ND | ND | ND | ND | SHV-1, 1 |
| Intermediate level (n = 28) | |||||
| 5.4 (21) | + | − | + | − | TEM-1 (P3), 15 |
| + | − | − | + | TEM-1 (Pa + Pb), 6 | |
| 5.6 (3) | − | + | − | + | TEM-2 (Pa + Pb), 3 |
| 5.4 + 5.6 (3) | + | + | − | + | TEM-1 (Pa + Pb) + TEM-2 (Pa + Pb), 1 |
| + | + | + | + | TEM-1 (P3) + TEM-2 (Pa + Pb), 2 | |
| 5.7 (1) | − | − | ND | ND | CARB-2 (PSE-1), 1 |
| High level (n = 53) | |||||
| 5.4 (19) | + | − | − | + | TEM-1 (Pa + Pb), 17 |
| + | − | + | + | TEM-1 (P3) + TEM-1 (Pa + Pb), 1 | |
| + | − | + | − | TEM-1 (P4), 1 | |
| 5.6 (21) | − | + | − | + | TEM-2 (Pa + Pb), 19 |
| − | + | + | − | TEM-2 (P4), 1 | |
| − | + | − | − | TEM-2 (deletion + G162→T), 1 | |
| 5.4 + 5.6 (12) | + | + | + | + | TEM-1 (P3) + TEM-2 (Pa + Pb), 10 |
| + | + | − | + | TEM-1 (Pa + Pb) + TEM-2 (Pa + Pb), 2 | |
| 7.7 (1) | ND | ND | ND | ND | SHV-1, 1 |
a
ND, not determined.