Volume 11, Number 1—January 2005
Research
Genetic Background of Escherichia coli and Extended-spectrum β-Lactamase Type
Table 4
Frequency of virulence factors among ciprofloxacin-susceptible and ciprofloxacin-resistant Escherichia coli strains involved in infection or colonization, according to extended-spectrum β-lactamase (ESBL) type
| ESBL type (no. strains) | No. (%) strains carrying |
Virulence factor mean score | |||
|---|---|---|---|---|---|
| pap | sfa/foc | hly | aer | ||
| Ciprofloxacin resistance | |||||
| TEM (15) | 4 (20) | 0 | 0 | 8 (53) | 0.8 |
| SHV (3) | 0 | 0 | 0 | 1 (33) | 0.33 |
| CTX-M (27) | 2 (7) | 0 | 0 | 12 (44) | 0.51 |
| All types (45) | 6 (13) | 0 | 0 | 21 (46) | 0.6 |
| Ciprofloxacin sensitivity | |||||
| TEM (40) | 14 (35) | 9 (22) | 9 22) | 9 (22) | 1 |
| SHV (19) | 13 (68) | 8 (42) | 9(47) | 10(52) | 2.1 |
| CTX-M (25) | 5 (20) | 1 (4) | 1 (4) | 13 (52) | 0.8 |
| All types (84) | 32 (55) | 18 (21) | 19 (22) | 32 (38) | 1.2 |
| All strains | |||||
| TEM (55) | 18 (33) | 9 (16) | 9 (16) | 17 (31) | 0.96 |
| SHV (22) | 13 (59) | 8 (36) | 9 (4) | 11 (50) | 1.8 |
| CTX-M (52) | 7 (13) | 1 (2) | 1 (2) | 25 (48) | 0.6 |
| All types (129) | 38 (29.5) | 18 (14) | 19 (15) | 53 (41) | 1 |
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