In vitro susceptibility of Helicobacter pylori to extracts of Eucalyptus camaldulensis and Eucalyptus torelliana

Figures & data

Table 1.  Minimum inhibitory concentrations^a of the crude extracts of Eucalyptus camaldulensis (Ec) and Eucalyptus torelliana (Et) against six strains of Helicobacter pylori (Hp).

Extract^b	Hp ATCC43504			Hp ATCC47619			Hp A2			Hp T18984			Hp 019A			Hp A6
	Stock	−2	−4	Stock	−2	−4	Stock	−2	−4	Stock	−2	−4	Stock	−2	−4	Stock	−2	−4
H, Ec, L	<25	<25	<25	<25	<25	<25	<25	<25	<25	50	50	<25	<25	<25	<25	25	<25	<25
C, Ec, L	<25	<25	<25	50	<25	<25	50	<25	<25	50	<25	<25	<25	<25	<25	<25	<25	<25
H, Ec, S	<12.5	<12.5	<12.5	50	<12.5	<12.5	<12.5	<12.5	<12.5	200	50	25	<12.5	<12.5	<12.5	25	<12.5	<12.5
C, Ec, S	<25	<25	<25	<25	<25	<25	<25	<25	<25	100	50	25	25	25	25	25	25	25
H, Et, L	25	<12.5	<12.5	<12.5	<12.5	<12.5	<12.5	<12.5	<12.5	50	25	25	25	<12.5	<12.5	<12.5	<12.5	<12.5
C, Et, L	<12.5	<12.5	<12.5	<12.5	<12.5	<12.5	<12.5	<12.5	<12.5	400	100	25	<12.5	<12.5	<12.5	<12.5	<12.5	<12.5
H, Et, S	<12.5	<12.5	<12.5	<12.5	<12.5	<12.5	<12.5	<12.5	<12.5	200	200	<12.5	25	<12.5	<12.5	25	<12.5	<12.5
C, Et, S	<12.5	<12.5	<12.5	<12.5	<12.5	<12.5	<12.5	<12.5	<12.5	100	100	50	<12.5	<12.5	<12.5	<12.5	<12.5	<12.5
M, Et, S	<12.5	<12.5	<12.5	<12.5	<12.5	<12.5	<12.5	<12.5	<12.5	200	100	12.5	<12.5	<12.5	<12.5	<12.5	<12.5	<12.5

^aMICs are in μg/mL, stock dilution as well as 2- and 4-fold dilutions (−2 and −4, respectively) of the Hp strains in broth. ^bH = n-hexane, C = chloroform, M = methanol, L = leaves, S = stem bark.