Table 4.
Antimicrobial resistance found in potentially pathogenic and commensal Escherichia coli.
| Antimicrobial class | Antimicrobial agent | No. (%)a of pathogenic E. colib | Commensal (n = 59) | |||
|---|---|---|---|---|---|---|
| EPEC (n = 10) | ETEC (n = 9) | EAEC (n = 67) | Incomplete ExPEC (n = 5) | |||
| Aminoglycosides | Gentamicin | 0 (0) | 0 (0) | 3 (4) | 0 (0) | 0 (0) |
| Netilmicin | 0 (0) | 0 (0) | 1 (1) | 0 (0) | 1 (2) | |
| Amikacin | 0 (0) | 0 (0) | 0 (0) | 0 (0) | 2 (3) | |
| Phenicols | Chloramphenicol | 3 (30) | 3 (33) | 16 (24) | 1 (20) | 10 (17) |
| Quinolones | Pefloxacin | 1 (10) | 1 (11) | 3 (4) | 0 (0) | 7 (12) |
| Levofloxacin | 1 (10) | 1 (11) | 3 (4) | 1 (20) | 0 (0) | |
| Sulfonamides | Trimethoprim-sulfamethoxazole | 3 (30) | 3 (33) | 22 (33) | 0 (0) | 14 (24) |
| Beta-lactams | Ampicillin | 6 (60) | 4 (44) | 29 (43) | 1 (20) | 17 (29) |
| Carbenicillin | 5 (50) | 3 (33) | 19 (28) | 1 (20) | 12 (20) | |
| Nitrofurans | Nitrofuratoin | 1 (10) | 0 (0) | 5 (7) | 1 (20) | 3 (5) |
| Cephalosporins | Cephalotine | 2 (20) | 1 (11) | 12 (18) | 0 (0) | 7 (12) |
| Cephatoxim | 1 (10) | 0 (0) | 1 (1) | 0 (0) | 0 (0) | |
| Ceftriaxone | 1 (10) | 0 (0) | 2 (3) | 0 (0) | 0 (0) | |
a
Percentages were calculated as follows: number of isolates with resistance phenotype/total number of E. coli isolates per pathotype per 100.
b
EPEC, enteropathogenic E. coli. ETEC, enterotoxigenic E. coli. EAEC, enteroaggregative E. coli. Incomplete ExPEC, incomplete extra-intestinal pathogen E. coli.