Table 3.

Minimal inhibitory concentration (MIC) of the studied plants extracts and chloramphenicol on the studied bacterial species

Bacterial strains	Tested samples and MIC in μg/ml in the absence and presence of PAßN (in parenthesis)
	Aframomum citratum	Aframomum melegueta	Imperata cylindricum	Cinnamomum zeylanicum	Dorstenia psilurus	Fagara leprieuri	Monodora myristica	Pentadiplandra brazzeana	Piper guineense	Scorodophloeus zenkeri	Tetrapleura tetraptera	CHL
E. coli
ATCC8739	512	512	512	64	-	512	1024	1024	1024	1024	1024	1
ATCC10536	1024	512	1024	512	128	256	1024	512	1024	512	1024 (1024)	32 (<2)
AG100	1024 (1024)	1024 (1024)	1024 (256)	- (64)	- (1024)	1024 (1024)	512	1024 (1024)	1024 (512)	1024 (1024)	1024 (1024)	4 (<2)
AG100A	512 (128)	1024 (1024)	1024 (128)	512 (128)	512 (128)	512 (512)	1024 (1024)	- (−)	1024 (1024)	1024 (1024)	1024 (1024)	<2 (<2)
AG100ATET	512 (512)	1024 (1024)	1024 (1024)	512 (512)	512 (128)	1024 (1024)	-	-	1024	512	1024	32 (<2)
AG102	1024	-	1024	1024	512	1024	-	-	-	-	-	16 (<2)
MC4100	512 (512)	512 (256)	1024 (1024)	1024 (1024)	512 (256)	512	- (−)	1024 (1024)	1024 (1024)	1024 (1024)	512 (512)	4 (<2)
W3110	512 (256)	512 (512)	512 (512)	512 (512)	512 (256)	256	512	1024 (1024)	1024 (128)	512	512 (512)	1 (<2)
E. aerogenes
ATCC13048	1024	-	1024	1024	1024	1024	1024	-	-	-	-	8 (<2)
CM64	1024 (1024)	1024 (1024)	512 (128)	1024 (512)	512 (256)	1024 (1024)	1024 (1024)	1024 (1024)	1024 (1024)	1024 (1024)	512 (512)	32
EA27	512 (512)	1024 (1024)	512 (512)	512 (512)	- (−)	1024 (1024)	1024 (1024)	1024 (1024)	-(−)	1024 (1024)	1024 (512)	64 (32)
EA289	-	1024	-	1024	-	-	1024	1024	-	-	1024	256
EA298	1024	512	-	-	1024	-	256	256	512	256	1024	256
EA3	-	-	-	-	-	1024	-	-	-	-	-	256
E. cloacae
BM47	512 (512)	1024 (1024)	1024 (1024)	1024 (512)	1024 (128)	1024 (1024)	1024 (1024)	1024	1024	1024	1024	- (8)
BM67	512 (512)	1024 (1024)	1024 (1024)	1024 (1024)	1024 (128)	- (−)	- (−)	- (−)	- (−)	- (−)	- (−)	- (32)
ECCI69	512 (512)	1024 (1024)	1024 (1024)	1024 (1024)	-(−)	-(−)	1024 (1024)	- (−)	1024 (1024)	1024 (1024)	1024 (512)	- (32)
K. pneumoniae
ATCC12296	1024	1024	1024	1024	1024	1024	512	-	-	-	1024	4
K2	1024	-	1024	1024	1024	-	1024	-	-	-	-	-
K24	1024	1024	1024	1024	1024	1024	512	-	-	1024	1024	32 (<2)
KP55	512	1024	256	512	512	1024	1024	-	-	-	1024	32(<2)
KP63	512 (512)	1024 (1024)	1024 (1024)	512 (512)	512 (128)	1024 (512)	1024 (1024)	512	1024 (1024)	1024 (512)	1024 (1024)	64(<2)
P. stuartuii
ATCC29916	1024 (1024)	- (−)	-(−)	-(−)	1024 (1024)	-(−)	-(−)	-(−)	1024 (1024)	1024 (1024)	1024 (1024)	8
NEA16	1024 (512)	- (−)	1024 (1024)	512 (512)	512 (256)	1024	1024	-	-	1024	-	64(<2)
PS2636	1024	-	-	-	-	-	-	-	-	-	-	-
PS299645	512	512	1024	1024	1024	1024	-	1024	1024	512	1024	128
P. aeruginosa
PA01	-	-	-	-	-	-	-	-	-	-	-	-
PA124	-	-	-	-	-	-	-	-	-	1024	-	32(<2)

(−): MIC not detected at up to 1024 μg/ml for the les extracts and 256 μg/ml for chloramphenicol. () : values in parenthesis are MIC of substance in the presence of PAßN at 20 μg/ml. The MIC of PAßN was 64 μg/ml on E. coli. AG100A. 512 μg/ml on ATCC11296. BM67. EA27. EA289; 1024 μg/ml on AG100A_TET. ATCC13048. CM64; and > 1024 μg/ml on other bacteria. CHL: chloramphénicol; (in bold): significant MIC value.