Table 3 Antibacterial activity (Diameter of the inhibition zone) of the 5 Tunisian Lamaiaceae plants essential oils and antibiotic *)

S. officinalis

11.3^a ± 1.2

7.7^a ± 1.2

7.0^a ± 1.0

17.3^b ± 0.6

8.3^a ± 0.6

T. capitatus

20.3^d ± 0.6

20.0^d ± 1.0

20.3^d ± 0.6

30.0^e ± 1.0

15.0^c ± 1.0

R. officinalis₁

11.0^a ± 1.0

8.7^a ± 0.6

8.3^b ± 0.8

19.3^c ± 1.2

10.0^ab ± 1.7

R. officinalis₂

15.3^b ± 0.6

7.7^a ± 1.2

6.0^a ± 0.0

25.3^d ± 0.6

10.3^ab ± 0.6

O. majorana

14.0^b ± 1.0

14.0^b ± 1.0

6.3^a ± 0.6

6.0^a ± 0.0

12.0^b ± 1.0

Gentamicine®

17.3^c ± 0.6

17.3^c ± 0.6

16.0^c ± 1.0

24.3^d ± 1.2

21.7^d ± 1.5