TABLE 3.
Frequencies of amoxicillin-clavulanate (AMC)-resistant E. coli isolates by sample
| Sample | No. (%) of AMC-resistant E. coli isolates
|
||
|---|---|---|---|
| 1996 | 1997 | 1998 | |
| Lower respiratory tract | 5 (9.4) | 6 (14.6)b | 7 (15.2)b |
| Urine | 67 (5.2) | 67 (5.6)b | 52 (4.3)b |
| Blood | 8 (6.0)a | 4 (3.1)b | 2 (1.4)ab |
| Deep pus | 8 (7.3) | 3 (2.9)b | 8 (4.8)b |
a
Significantly lower frequencies of AMC-resistant E. coli isolates in blood in 1998 than in 1996 (P = 0.04).
b
Significantly higher frequencies of AMC-resistant E. coli isolates in lower respiratory tract samples than in each other type of sample in 1997 and 1998; urine (1997, P = 0.03; 1998, P = 0.04), blood (1997, P = 0.01; 1998, P = 0.0007), and deep pus (1997, P = 0.02; 1998, P = 0.02).