Bacterial type Bacterial strain Extracted part MIC (mg/ml) MBC (mg/ml) Aqueous extract Gram positive bacteria S. epidermidis (CIP 444) leaves 9 75 stems 300 300 E. faecalis (ATCC29212) leaves >800 >800 stems >800 >800 S. aureus (ATCC25923) leaves >800 >800 stems >800 >800 Gram negative bacteria E. coli (ATCC35218) leaves 300 300 stems >800 >800 P. aeruginosa (ATCC27853) leaves 150 150 stems 300 300 Ethanolic extract Gram positive bacteria S. epidermidis (CIP 444) leaves 18 36 stems 300 300 E. faecalis (ATCC29212) leaves 150 >800 stems 300 >800 S. aureus (ATCC25923) leaves 300 300 stems 300 >800 Gram negative bacteria E. coli (ATCC35218) leaves 300 300 stems 300 300 P. aeruginosa (ATCC27853) leaves 150 150 stems 300 300

Table 3: Antibacterial activity of the extracts of Centranthus longiflorus of the first period.