VSCs (ppb)

No. of total bacteria

(CFU)

No. of oral Veillonella-

positive subjects

(%, frequency)

No. of oral Veillonella species (CFU)

Total

H₂S

CH₃SH

(CH₃)₂S

Healthy subjects without halitosis (n = 50)

78.2

65.8

8.2

4.2

1.43 × 10⁷*

50 (100)

3.97 × 10⁶*

Halitosis subjects (n = 50)

812.6

772.3

24.6

15.7

5.21 × 10⁷*

50 (100)

2.58 × 10⁷*