TABLE 1.
Characteristics of ESBL-producing Klebsiella isolates from the IVZ collection
| Yr of isolation | No. of isolates from:
|
Total no. of nonrepetitive isolates | No. (%) of isolates with different resistance phenotype
|
No. (%) of isolates with detected resistance gene
|
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nursing home residents (n = 31) | Hospital, Trbovlje (n = 26) | Urological outpatient clinic (n = 7) | General practices (n = 10) | CIPa resistant | CIP intermediate | NORb resistant | NOR intermediate | NOR susceptible | aac(6′)-Ib-crc | aac(6′)-Ib | ||
| 2000 | 5 | 2 | 1 | 0 | 8 | 4 (50) | 4 (50) | 4 (50) | 0 (0) | 4 (50) | 0 (0.0) | 6 (75) |
| 2001 | 2 | 0 | 1 | 0 | 3 | 2 (66) | 1 (33) | 1 (33) | 1 (33) | 1 (33) | 1 (33.3) | 3 (100) |
| 2002 | 3 | 2 | 1 | 0 | 6 | 3 (50) | 3 (50) | 3 (50) | 2 (33) | 1 (17) | 0 (0.0) | 5 (83) |
| 2003 | 7 | 9 | 2 | 2 | 20 | 18 (90) | 2 (10) | 18 (90) | 2 (10) | 0 (0) | 10 (50.0) | 14 (70.0) |
| 2004 | 7 | 6 | 2 | 5 | 20 | 20 (100) | 0 (0) | 19 (95) | 0 (0) | 1 (5) | 9 (45.0) | 11 (55) |
| 2005 | 7 | 7 | 0 | 3 | 17 | 15 (88) | 2 (12) | 15 (88) | 1 (6) | 1 (6) | 5 (29) | 10 (58) |
a
CIP, ciprofloxacin.
b
NOR, norfloxacin.
c
aac(6′)-Ib-cr detected on transconjugants TK1 to TK25.