Table 3.

Minimum inhibitory concentration (MIC) and Minimum bactericidal and fungicidal concentrations (MBC, MFC) of compound 3 from A. ataxacantha

Minimum inhibitory concentrations (μg/ml)
Microorganismsa	Gram (+) bacteria				Gram (-) bacteria	Yeast
	S. a	S.a.m.r	S. ep	E. f	P. a	C. a
3 b	50	25	12.5	25	25	12.5
Gentamicin	0.39	0.39	0.78	0.39	0.78	Nt
Fluconazole	Nt	Nt	Nt	Nt	Nt	0.78
Minimum bactericidal and fungicidal (μg/ml)
3 b	50	50	50	50	25	25
Gentamicin	0.78	1.56	1.56	0.78	1.56	Nt
Fluconazole	Nt	Nt	Nt	Nt	Nt	1.56
MIC index
3 b	1	2	4	2	1	2
Gentamicin	2	4	2	2	2	Nt
Fluconazole	Nt	Nt	Nt	Nt	Nt	2

^a S.a : Staphylococcus aureus; S.a.m.r : Staphylococcus aureus methicillin resitant; S.ep : Staphylococcus epidermidis; E.f: Enterococcus faecalis; P.a: Pseudomonas aeruginosa; C.a: Candida albicans

^b 3: betulinic acid-3-trans-caffeate

Nt: not tested. MIC, MBC or MFC of compounds 1 and 2 were not determined