Antibacterial Activities of Selected Cameroonian Plants and Their Synergistic Effects with Antibiotics against Bacteria Expressing MDR Phenotypes

Table 2

Bacterial strains and features.

Strains	Features	References
Escherichia coli
ATCC8739 and ATCC10536	Reference strains
AG100	Wild-type E. coli K-12	[31]
AG100A	AG100 ΔacrAB::KAN^R	[31, 34]
AG100ATET	ΔacrAB mutant AG100, owing acrF gene markedly overexpressed; TET^R	[31]
AG102	ΔacrAB mutant AG100	[35]
MC4100	Wild type E. coli
W3110	Wild type E. coli	[36]
Enterobacter aerogenes
ATCC13048	Reference strains
EA-CM64	CHL^R resistant variant obtained from ATCC13048 over-expressing the AcrAB pump	[37]
EA3	Clinical MDR isolate; CHL^R, NOR^R, OFX^R, SPX^R, MOX^R, CFT^R, ATM^R, FEP^R	[38]
EA27	Clinical MDR isolate exhibiting energy-dependent norfloxacin and chloramphenicol efflux with KAN^R and AMP^R and NAL^R and STR^R and TET^R	[38, 39]
EA289	KAN sensitive derivative of EA27	[40]
EA298	EA 289 tolC::KAN^R	[40]
EA294	EA 289 ΔacrAB: ::KAN^R	[40]
Enterobacter cloacae
ECCI69	Clinical isolates	Laboratory collection of UMR-MD1, University of Marseille, France
BM47	Clinical isolates	Laboratory collection of UMR-MD1, University of Marseille, France
BM67	Clinical isolates	Laboratory collection of UMR-MD1, University of Marseille, France
Klebsiella pneumoniae
ATCC12296	Reference strains
KP55	Clinical MDR isolate, TET^R, AMP^R, ATM^R, and CEF^R	[41]
KP63	Clinical MDR isolate, TET^R, CHL^R, AMP^R, and ATM^R	[41]
K24	AcrAB-TolC	Laboratory collection of UMR-MD1, University of Marseille, France
K2	AcrAB-TolC	Laboratory collection of UMR-MD1, University of Marseille, France
Providencia stuartii
NEA16	Clinical MDR isolate, AcrAB-TolC
ATCC29914	Clinical MDR isolate, AcrAB-TolC	[42]
PS2636	Clinical MDR isolate, AcrAB-TolC
PS299645	Clinical MDR isolate, AcrAB-TolC
Pseudemonas aeruginosa
PA 01	Reference strains
PA 124	MDR clinical isolate	[43]

^aAMP, ATM^R, CEF^R, CFT^R, CHL^R, FEP^R, KAN^R, MOX^R, STR^R, and TET^R. Resistance to ampicillin, aztreonam, cephalothin, cefadroxil, chloramphenicol, cefepime, kanamycin, moxalactam, streptomycin, and tetracycline; MDR: multidrug resistant.