TABLE 5.
Overall frequency of antibiotic resistance in E. coli and comparison of frequencies between strains isolated from Australia and México
| Antibiotic for which resistance was tested | % of strains resistant to indicated antibiotic
|
Level of statistical significancea | ||
|---|---|---|---|---|
| All strains | Mexican strains (n = 135) | Australian strains (n = 46) | ||
| Ampicillin | 13.4 | 18.5 | 5.8 | ∗ |
| Chloramphenicol | 0.8 | 0.6 | 0 | NS |
| Streptomycin | 23.9 | 32.6 | 5.8 | ∗∗∗ |
| Kanomycin | 2.1 | 3.3 | 0 | NS |
| Neomycin | 3.4 | 2.6 | 0 | NS |
| Tetracycline | 5.9 | 7.8 | 0 | ∗ |
a
For explanation of significance levels, see footnote c, Table 4.