Table 4.

MIC of tested plant extracts in the absence and presence of PAβN against the studied bacterial strains

Bacterial strains	Tested samples and MIC (μg/mL)
	P. Fernandopoina (Whole plant)	C. succirubia		P. staudtii			V. soyauxii			C. biafrae (Whole plant)	B. obscura (Fruits)	E. giga (Leaves)	CHL
		Leaves	S. bark	Leaves	S. bark	Root	Leaves	S. bark	R. bark
E. coli
AG100ATet	1024 (512)	- (-)	- (-)	1024 (-)	- (-)	1024 (1024)	1024 (1024)	512 (1024)	1024 (1024)	- (-)	1024 (1024)	- (-)	64 (≤2)
AG102	1024 (1024)	- (-)	- (-)	1024 (1024)	- (1024)	- (-)	1024 (1024)	- (1024)	- (-)	- (-)	1024 (1024)	1024 (1024)	32 (≤2)
E. aerogenes
CM64	- (-)	- (-)	- (1024)	- (-)	- (-)	- (-)	- (-)	- (-)	- (-)	- (-)	- (-)	- (-)	>256 (16)
EA289	- (-)	- (-)	- (-)	1024 (-)	- (-)	- (-)	- (-)	- (1024)	- (-)	- (-)	- (-)	- (1024)	128 (16)
E. cloacae
ECCI69	1024 (1024)	- (1024)	- (512)	- (-)	- (-)	- (-)	- (-)	- (-)	- (1024)	- (-)	- (-)	- (-)	>256 (128)
K. pneumonia
KP55	512 (512)	- (-)	- (-)	512 (128)	1024 (512)	512 (256)	1024 (1024)	1024 (1024)	512 (512)	1024 (-)	32 (≤8)	- (-)	64 (4)
K24	1024 (1024)	- (-)	- (1024)	- (-)	- (-)	- (-)	- (-)	- (-)	- (-)	- (-)	- (-)	- (-)	32 (2)
P. stuartuii
NEA16	- (-)	- (-)	- (-)	- (1024)	- (-)	- (-)	- (-)	- (-)	- (-)	- (-)	- (-)	- (-)	64 (4)
P. aeruginosa
PA124	- (-)	- (-)	- (-)	- (-)	- (-)	- (-)	- (-)	- (-)	- (-)	- (-)	- (-)	- (-)	64 (8)

(-): MIC not detected at up to 1024 μg/mL; (): MIC of samples in the presence of PAβN at 20 μg/mL. The MIC of PAβN was 128 μg/mL on E. cloacae ECCI69 and > 256 μg/mL on other bacteria.

CHL: chloramphenicol.