TABLE 2.
Diameters of the zones of inhibition of growth of the C. glutamicum wild-type and ΔporA mutant strains with different antibioticsa
| Antibiotic | Diam of inhibition zone (mm)
|
|
|---|---|---|
| C. glutamicum wild type | C. glutamicum ΔporA mutant | |
| Ampicillin | >25 | NI |
| Kanamycin | >25 | 5 |
| Streptomycin | >25 | 4 |
| Tetracycline | >25 | NI |
| Gentamicin | 5 | 2 |
a
Five-microliter portions of the diluted 1:1,000 stock solutions of the different antibiotics (see Materials and Methods) were added to the discs. The diameters of the inhibition zones were measured after 16 and 24 h. NI, no inhibition of growth.