Table 1.
The frequency of promoter regions and insertions and deletions identified in TEM-producing E. coli isolates
| TEM type (n)a | Promoter class (no. of isolates) |
No. of isolates with: |
|||||
|---|---|---|---|---|---|---|---|
| P3 | PaPb | P4 | Pdel | IS26 insertionb | IS911 insertionc | C31→T39 deletion | |
| TEM-1 (53) | 27 | 18 | 2 | 4 | 1 | 1 | |
| TEM-40 (15) | 6 | 6 | 3 | ||||
| TEM-30 (13) | 5 | 6 | 1 | 1 | |||
| TEM-33 (5) | 2 | 3 | |||||
| TEM-185 (4) | 3 | 1 | |||||
| TEM-32 (2) | 2 | ||||||
| TEM- 34 (2) | 2 | ||||||
| TEM-35 (1) | 1 | ||||||
| TEM-76 (1) | 1 | ||||||
| TEM-79 (1) | 1 | ||||||
a
n, number of isolates.
b
The IS26 element was detected upstream of blaTEM, inserted at promoter position 150 (n = 3) or 46 (n = 2) according to the Sutcliffe numbering system (29).
c
The IS911 element was detected upstream of blaTEM-1, inserted at promoter position 46.