Bark extract of Cassia sieberiana DC. (Caesalpiniaceae) displayed good antibacterial activity against MDR gram-negative phenotypes in the presence of phenylalanine-arginine β-naphthylamide

Table 1 Characteristics of the studied bacterial strains

Species	Types	Characteristics	References
Escherichia coli	ATCC 8739	Reference strain	[13]
Escherichia coli	AG102	△acrAB mutant AG100, owing acrF gene markedly overexpressed;TET^R	[13]
Klebsiella pneumoniae	ATCC 11296	Reference strain	[14]
Klebsiella pneumoniae	KP55	Clinical MDR isolate Tet^r, Amp^r, Atm^r, Cef^r	[14]
Pseudomonas aeruginosa	PA01	Reference strain	[15]
Pseudomonas aeruginosa	PA124	MDR clinical isolate expressing Mex efflux pump	[15]
Enterobacter aerogenes	ATCC13048	Reference strain	[13]
Enterobacter aerogenes	EA 27	Clinical MDR isolate exhibiting energy-dependent norfloxacin and chloramphenicol efflux with Kan^r, Amp^r, Nal^r, Str^r, Tet^r	[16]
Providencia stuartii	ATCC29916	Reference strain	[17]
Providencia stuartii	PS 2636	Clinical MDR isolate, AcrAB-TolC	[17]

Ofxa^r, Kan^r, Tet^r, Erm^r, Amp^r, Nal^r,Str^r, Atm^r, Cef^r, Cip^r, Im/CSB^r, Chl^r, Gen^r, Nis^r, Flx^r: resistant (r) to ofloxacin, kanamycin, tetracyclin, erythromycin, ampicillin, nalidixic acid, streptomycin, aztreoname, cefepim, ciprofloxacin, imipenem/Cilastatin sodium, chloramphenicol, gentamycin, nisine and flomoxef respectively; MDR: Multidrug-resistant;. AcrAB-TolC, AcrAB and Mar A are efflux pumps

ISSN: 2662-7671