TABLE 1.
Prevalence of TEM- and SHV-type beta-lactamases in 56 isolates of K. pneumoniae and E. coli with the capacity for transferring resistance to ceftazidime
| Species (no. of isolates) | No. of isolates producing the following beta-lactamasea:
|
||||||
|---|---|---|---|---|---|---|---|
| TEM- type
|
SHV- type
|
||||||
| TEM-1 | TEM-19 | TEM-20 | TEM-52 | TEM-116 | SHV-2a | SHV-12 | |
| K. pneumoniae (42) | 20 (13) | 2 | 1b | 10 (6) | 2 (1) | 25 (18) | |
| E. coli (14) | 9 (6) | 1c | 1 | 2 | 7 (6) | ||
| Total TEM type (46) | 29 (19) [63.0] | 2 [4.3] | 1 [2.2] | 2 [4.3] | 12 (6) [26.1] | ||
| Total SHV type (34) | 2 (1) [5.9] | 32 (24) [94.1] | |||||
a
The number of isolates that produced both TEM- and SHV-type beta-lactamases is in parentheses. The percentage of the total is in brackets.
b
Isolate K. pneumoniae SV3, which produces both TEM- and CMY-type beta-lactamases.
c
Isolate E. coli SH16, which produces both TEM- and CMY-type beta-lactamases.