Table 2.
Antibacterial activity in vitro.
| Microbial straina | Inhibition zone (mm) at 200 µg/mL | MICb (µg/mL) | |||||||
| 37a | 37b | Roxc | Cfxd | 37a | 37b | Roxc | Cfxd | ||
|
Staphylococcus aureus (ATCC 6538) |
0.0 | 0.0 | 30 | 40 | – | – | 12.5 | 6.25 | |
|
Escherichia coli (ATCC 8739) |
0.0 | 0.0 | 14.6 | 22.9 | – | – | 100 | 50 | |
|
Bordetella bronchiseptica (ATCC 4617) |
0.0 | 6.0 | 8 | 33 | – | 150 | 150 | 12.5 | |
|
Micrococcus luteus (ATCC 10240) |
0.0 | 6.0 | 30 | 40 | – | 150 | 12.5 | 12.5 | |
|
Salmonella typhimurium (ATCC 14028) |
0.0 | 6.0 | 12 | 40 | – | 150 | 100 | 6.25 | |
|
Enterobacter aerogenes (ATCC 13048) |
0.0 | 0.0 | 15 | 34 | – | – | 100 | 12.5 | |
aBordetella bronchistepica: Gram negative, relevant to veterinary science; Micrococcus luteus: Gram positive, not dangerous for humans; Salmonella typhimurium: Gram negative, relevant to veterinary science. bMIC = minimum inhibitory concentration. cRox = roxithromycin. dCfx = cefixime.