Antimicrobial Activity of Lippia Species from the Brazilian Semiarid Region Traditionally Used as Antiseptic and Anti-Infective Agents

Table 2

Minimum inhibitory concentration (MIC) of the crude extract and fractions from L. origanoides and reference antibiotics.

Samples	Minimum inhibitory concentration (mg⋅mL^−1)
	E. coli; CCMB261	S. aureus; CCMB262	S. aureus; CCMB263	P. aeruginosa; CCMB268	C. albicans; CCMB286	C. parapsilosis; CCMB288
L. origanoides leaves
CEXL	5.263	1.316	0.658	5.263	2.631	2.631
HEFL	1.316	—	0.329	—	2.631	—
DIFL	0.658	—	2.631	—	1.316	—
EAFL	0.658	—	0.329	—	2.631	—
AQFL	2.631	—	2.631	—	2.631	—
L. origanoides stems
CEXS	5.263	5.263	2.631	5.263	2.631	5.263
HEFS	2.631	—	0.658	—	2.631	—
DIFS	0.658	—	2.631	—	0.658	—
EAFS	1.316	—	2.631	—	2.631	—
AQFS	5.263	—	5.263	—	2.631	—
Chloramphenicol	10	0.078	0.313	5	—	—
Nystatin	—	—	—	—	1.25	2.5

(—): not evaluated; CEX: crude extract; HEF: hexane fraction; DIF: dichloromethane fraction; EAF: ethyl acetate fraction; AQF: aqueous fraction; L: leaves; S: stems. MIC = 2.631 mg⋅mL⁻¹ was the maximum value considered for attribution of antimicrobial activity for each strain.