Diameter o the inhibition zone (mm)

Pathogenic bacteria

Ampicillin (control, 5 µg/ml)

Olive

Lemon-grass

Lantana

30 ± 2.5

10 ± 2.0

28 ± 1.5

22 ± 2.0

E. coli

29 ± 1.5

14 ± 1.5

29 ± 0.5

20 ± 2.1

K. pneumoniae

33 ± 0.9

10 ± 0.4

24 ± 1.4

20 ± 2.2

P. mirabilis

34 ± 0.9

8 ± 0.5

25 ± 1.6

20 ± 1.0

P. aeuroginosa

26 ± 0.5

19 ± 0.4

20 ± 1.4

18 ± 1.7

E. faecalis

27 ± 1.0

20 ± 1.5

20 ± 1.0

14 ± 1.1

S. aureus

29.8

13.1*

24.3

19*

Activity index⁺