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Table 1 Antimicrobial activity of menthol isolated from M. longifolia leaf oil.

From: Isolation and identification of antimicrobial compound from Mentha longifolia L. leaves grown wild in Iraq

Microorganisms

Zone of inhibition (mm)

 

Menthol concentrations

Control

 

1:1

1:5

1:10

1:20

S

A

S. aureus

24.8

20.6

15.7

11.8

20.9

N.T

S. mutans

25.3

21.9

17.5

12.3

19.5

N.T

S. faecalis

23.2

19.2

15.0

10.7

24.3

N.T

S. pyogenis

22.3

18.3

14.8

10.0

19.2

N.T

L. acidophilus

23.6

19.3

15.4

10.5

18.1

N.T

P. aeruginosa

00.0

00.0

00.0

00.0

11.2

N.T

C. albicans

18.5

15.4

11.0

7.1

N.T

10.2

  1. S: Streptomycin (25 μg/disc), A: Amphotericin B (10 μg/disc), N.T: Not tested