Bacterial type Bacterial strain Extracted part MIC (mg/ml) MBC (mg/ml) Aqueous extract Gram positive bacteria S. epidermidis (CIP 444) leaves 394 >800 stems 428 >800 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 >800 >800 stems >800 >800 P. aeruginosa (ATCC27853) leaves 200 200 stems 450 450 Ethanolic extract Gram positive bacteria S. epidermidis (CIP 444) leaves 30 30 stems 160 >800 E. faecalis (ATCC29212) leaves >800 >800 stems >800 >800 S. aureus (ATCC25923) leaves 400 >800 stems 450 >800 Gram negative bacteria E. coli (ATCC35218) leaves 198 198 stems 450 >800 P. aeruginosa (ATCC27853) leaves 428 428 stems 400 400

Table 4: Antibacterial activity of the extracts of Centranthus longiflorus of the second period.