Research Article

Antibacterial and Antibiotic-Potentiating Activities of Thirteen Cameroonian Edible Plants against Gram-Negative Resistant Phenotypes

Table 2

MIC and MBC of the plant extracts and chloramphenicol against bacteria strain.

Bacterial strainsaSamplesb MIC and MBC in μg/mL (in Bracket)
Plant extractsAntibiotic
AIBCGrPCGrLCGwLCMBDEBDELDESHELIBLIGBPVLSMLSOLTCBBTCLUGBUGLCHL

E. coli
ATTC87391024 (-)1024 (-)1024 (-)1024 (-)1024 (-)--1024 (-)512 (-)1024 (-)-512 (-)-1024 (-)64 (-)1024 (-)64 (1024)256(1024)8 (64)
ATCC105361024 (-)1024 (-)1024 (-)-1024 (-)---1024 (-)--512 (-)----128 (-)1024 (-)4 (16)
AG1001024 (-)-1024 (-)512 (-)1024 (-)-1024 (-)-512 (-)-1024 (-)512 (1024)-1024 (-)1024 (-)-512 (-)512 (-)32 (64)
AG1021024 (-)-512 (-)-1024 (-)---1024 (-)--512 (-)-512 (-)256 (-)-256 (1024)-32 (256)
AG100Atet1024 (-)1024 (-)256 (-)512 (-)--1024 (-)-1024 (-)1024 (-)----64 (-)1024 (-)256 (-)512 (-)4 (32)
MC41001024 (-)-256 (-)-128 (1024)-1024 (-)1024 (-)512 (-)--256 (512)-1024 (-)---512 (-)128 (-)
W31101024 (-)-1024 (-)--1024 (-)-1024 (-)512 (1024)--1024 (-)-1024 (-)---512 (-)8 (32)
E. aerogenes
ATCC130481024 (-)----1024 (-)512 (-)512 (-)256 (-)256 (-)-1024 (-)-512 (-)-256 (-)-512 (-)8 (128)
EA27512 (1024)--1024 (-)-1024 (-)512 (1024)1024 (-)512 (1024)256 (256)-512 (1024)-512 (-)256 (-)256 (256)1024 (-)1024 (-)128 (256)
EA2891024 (-)-1024 (-)128(-)512 (-)512 (-)256 (1024)512 (-)512 (-)1024 (-)-1024 (-)1024 (-)1024 (-)1024 (-)1024 (-)--4 (64)
EA2941024 (-)-1024 (-)--1024 (-)512 (-)128 (512)---512 (-)-----512 (-)2 (256)
EA 298512 (-)1024 (-)-1024 (-)---1024 (-)256 (-)512 (-)-1024 (-)1024 (-)512 (-)-512 (-)1024 (-)1024 (-)8 (128)
K. pneumoniae-
ATCC11296-1024 (-)1024 (-)128(-)---1024 (-)512 (-)512 (-)1024 (-)512 (-)---512 (-)-1024 (-)8 (256)
K241024 (-)-128 (512)--1024 (-)512 (-)-512 (-)--512 (-)-1024 (-)64 (-)-128 (-)512 (-)16 (128)
KP551024 (-)---128 (1024)--1024 (-)512 (-)512 (-)--1024 (-)512 (-)1024 (-)512 (-)512 (-)1024 (-)64 (128)
KP63512 (1024)----1024 (-)-512 (-)-256 (-)-512 (-)--1024 (-)256 (-)--16(128)
P. stuartii
PS2636-----512 (-)512 (-)512 (-)512 (1024)--512 (-)-----1024 (-)64 (256)
NEA16-----512 (-)512 (-)256 (-)512 (-)----1024 (-)---1024 (-)64 (128)
E. cloacae
ECCI69512 (-)1024 (-)---128 (-)256 (1024)128 (-)-512 (-)-512 (-)--1024 (-)512 (-)-512 (-)128 (-)
P. aeruginosa
PA011024 (-)-1024 (-)--512 (-)1024 (-)512 (1024)---512 (1024)-1024 (-)1024 (-)-128 (-)-128 (-)
PA1241024 (-)1024(-)512 (-)512 (-)---1024 (-)512(-)1024 (-)-512 (-)-1024 (-)--512 (-)-32 (-)

strain [E.c: Escherichia coli, E.a: Enterobacter aerogenes, K.p: Klebsiella pneumoniae, P.s: Providencia stuartii, E.cl: Enterobacter cloacae, P.a: Pseudomonas aeruginosa]. [AIB: Azadirachta indica bark, CGrP: Citrus grandis (red) pericarp, CGrL: Citrus grandis (red) leaves, CGwL: Citrus grandis (white) leaves, CMB: Cucurbita maxima beans, DEB: Dacryodes edulis bark, DEL: Dacryodes edulis leaves, DES: Dacryodes edulis seeds, HEL: Hibiscus esculentus leaves, IBL: Ipomoea batatas leaves, IGB: Irvingia gabonensis beans, PVL: Phaseolus vulgaris leaves, SML: Spondias mombin leaves, SOL: Saccharum officinarum leaves, TCBB: Theobroma cacao beans, TCL: Theobroma cacao leaves, UGB: Uapaca guineensis bark, UGL: Uapaca guineensis leaves, CHL: chloramphenicol]. MIC: minimal inhibitory concentration, MBC: minimal bactericidal concentration, -: MIC and MBC at up to 1024 μg/mL; MIC in bold: significant activity.