Table 4. Volatile compound produced by the studied isolates from Algerian camel’s milk (HS/GC/MS analysis).
| Species/strain | Acetaldehyde | 2-Propanone | 2-Methyl propanal | Methyl acetate | 2-Methyl butanal | 3-Methyl butanal | 2-Propanol | Ethanol | 2,2,4,6,6-PMH | Diacetyl | Methyl butanoate | 2-Methyl-1-propanol | Methyl hexanoate | 2 or 3-Methyl1-butanol | Acetoin | Acetic acid | 1,3 or 2,3-Butanol | Butanoic acid |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ln. mesenteroides | ||||||||||||||||||
| LEY1 | n.d. | 331.0 | n.d. | n.d. | n.d. | n.d. | 342.7 | 3319.7 | 171.8 | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. |
| LEY2 | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | 6281.9 | 182.4 | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. |
| LEY3 | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | 13903.0 | 1874.9 | n.d. | 39.3 | n.d. | 33.1 | n.d. | n.d. | n.d. | n.d. | n.d. |
| LEY4 | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | 3296.0 | 1248.0 | n.d. | 41.3 | n.d. | 40.1 | n.d. | n.d. | n.d. | n.d. | n.d. |
| LEY5 | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | 6224.4 | 394.9 | n.d. | 25.5 | n.d. | 19.5 | n.d. | n.d. | 359.5 | 107.4 | 143.1 |
| LEY9 | 72.6 | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | 3044.1 | 89.7 | n.d. | 3.7 | n.d. | 30.4 | n.d. | n.d. | n.d. | n.d. | n.d. |
| LEY10 | 276.9 | 64.5 | n.d. | n.d. | n.d. | n.d. | n.d. | 5877.9 | 1818.9 | n.d. | 63.7 | n.d. | 51.8 | n.d. | n.d. | 111.0 | n.d. | n.d. |
| Lb. rhamnosus | ||||||||||||||||||
| LEY14 | 15.0 | n.d. | n.d. | 50.7 | n.d. | n.d. | n.d. | 29.5 | 88.5 | 19.5 | n.d. | n.d. | 4.7 | n.d. | 122.5 | 86.4 | n.d. | n.d. |
| LEY15 | n.d. | n.d. | n.d. | 36.8 | n.d. | n.d. | n.d. | 74.1 | n.d. | 13.5 | n.d. | n.d. | n.d. | n.d. | 130.5 | 128.6 | n.d. | n.d. |
| LEY16 | 7.9 | n.d. | n.d. | 30.1 | n.d. | n.d. | n.d. | 28.1 | 81.4 | 21.5 | n.d. | n.d. | n.d. | n.d. | 128.9 | 161.1 | n.d. | n.d. |
| LEY17 | 9.2 | n.d. | n.d. | 35.6 | n.d. | n.d. | n.d. | 27.8 | 63.8 | 8.1 | n.d. | n.d. | 4.7 | n.d. | 88.7 | 111.6 | n.d. | n.d. |
| LEY18 | 8.8 | n.d. | n.d. | 37.7 | n.d. | n.d. | n.d. | 31.4 | n.d. | 18.7 | n.d. | n.d. | n.d. | n.d. | 96.3 | 94.1 | n.d. | n.d. |
| LEY19 | 12.4 | n.d. | n.d. | 31.7 | n.d. | n.d. | n.d. | 56.6 | 49.1 | 24.5 | n.d. | n.d. | n.d. | n.d. | 132.8 | 144.9 | n.d. | n.d. |
| LEY20 | 13.6 | n.d. | n.d. | 42.4 | n.d. | n.d. | n.d. | 30.0 | 89.0 | 20.4 | n.d. | n.d. | 6.6 | n.d. | 131.6 | 82.2 | n.d. | n.d. |
| E. hirae | ||||||||||||||||||
| LMA16 | 7.6 | n.d. | n.d. | 73.7 | n.d. | n.d. | n.d. | 36.6 | 105.5 | 16.0 | 2.2 | n.d. | n.d. | n.d. | 33.6 | 3.8 | n.d. | n.d. |
| LMA18 | 4.5 | n.d. | n.d. | 77.4 | n.d. | n.d. | n.d. | 36.4 | 95.3 | n.d. | n.d. | n.d. | n.d. | n.d. | 25.1 | 6.8 | n.d. | n.d. |
| E. faecium | ||||||||||||||||||
| LMA1 | 32.3 | n.d. | n.d. | 45.7 | n.d. | n.d. | n.d. | 17.7 | n.d. | n.d. | n.d. | n.d. | 4.8 | n.d. | 51.2 | 86.5 | n.d. | 11.6 |
| LMA2 | 51.7 | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | 70.2 | 95.0 | n.d. | 9.9 | n.d. | 21.4 | n.d. | 16.0 | 18.9 | n.d. | n.d. |
| LMA3 | 27.2 | n.d. | n.d. | 18.4 | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | 3.4 | n.d. | 36.2 | 18.8 | n.d. | n.d.- |
| LMA4 | 45.6 | n.d. | n.d. | 32.8 | n.d. | n.d. | n.d. | n.d. | 116.0 | n.d. | 8.1 | n.d. | 18.2 | n.d. | 56.6 | 29.7 | n.d. | n.d. |
| LMA5 | 35.0 | n.d. | n.d. | 41.0 | n.d. | n.d. | n.d. | n.d. | 99.3 | n.d. | 5.8 | n.d. | 14.1 | n.d. | 53.1 | 32.7 | n.d. | n.d. |
| LMA6 | 83.9 | n.d. | n.d. | 64.4 | n.d. | n.d. | n.d. | 275.4 | 118.2 | n.d. | 9.1 | n.d. | 20.3 | n.d. | 15.7 | 9.2 | n.d. | n.d. |
| LMA7 | 85.5 | n.d. | n.d. | 15.7 | n.d. | n.d. | n.d. | 305.4 | n.d. | n.d. | 10.8 | n.d. | 21.2 | n.d. | 20.5 | n.d. | n.d. | n.d. |
| LMA8 | 47.4 | n.d. | n.d. | 37.9 | n.d. | n.d. | n.d. | 13.6 | n.d. | n.d. | 8.5 | n.d. | 10.8 | n.d. | 34.5 | n.d. | n.d. | n.d. |
| LMA9 | 147.4 | n.d. | 27.5 | 63.7 | 11.3 | 242.3 | n.d. | 30.5 | n.d. | n.d. | 12.7 | 8.8 | 24.6 | 126.1 | 94.0 | 68.9 | n.d. | n.d. |
| LMA10 | 41.5 | n.d. | n.d. | 34.5 | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | n.d. | 3.2 | n.d. | 34.0 | 73.5 | n.d. | n.d. |
| LMA11 | 60.4 | n.d. | n.d. | 47.7 | n.d. | n.d. | n.d. | 18.0 | 130.7 | n.d. | n.d. | n.d. | n.d. | n.d. | 47.7 | 39.7 | n.d. | n.d. |
| LMA12 | 35.1 | n.d. | 18.2 | 46.3 | n.d. | n.d. | n.d. | 8.6 | 104.7 | n.d. | 4.1 | n.d. | 14.8 | n.d. | 52.1 | 41.1 | n.d. | n.d. |
| LMA13 | 73.8 | n.d. | n.d. | 66.3 | n.d. | n.d. | n.d. | 325.2 | 118.3 | n.d. | 8.1 | n.d. | 14.5 | n.d. | 6.7 | 53.1 | n.d. | n.d. |
| LMA14 | 44.6 | n.d. | n.d. | 37.1 | n.d. | n.d. | n.d. | 101.2 | 65.5 | n.d. | 12.9 | n.d. | 21.3 | n.d. | 20.0 | 22.7 | n.d. | n.d. |
| LMA15 | 44.6 | n.d. | n.d. | 24.1 | n.d. | n.d. | n.d. | 91.0 | 102.3 | n.d. | 15.0 | n.d. | 41.0 | n.d. | 20.5 | n.d. | n.d. | n.d. |
| LMA17 | 56.8 | n.d. | n.d. | 21.6 | n.d. | n.d. | n.d. | 102.6 | 122.6 | n.d. | 12.7 | n.d. | 27.5 | n.d. | 17.2 | 5.8 | n.d. | n.d. |
| LMA19 | 78.2 | n.d. | n.d. | 32.4 | n.d. | n.d. | n.d. | 338.4 | 121.7 | n.d. | n.d. | n.d. | 3.6 | n.d. | 9.2 | 14.2 | n.d. | n.d. |
| LMA20 | 66.7 | n.d. | n.d. | 48.6 | n.d. | n.d. | n.d. | 318.9 | 136.5 | n.d. | n.d. | n.d. | 15.8 | n.d. | 6.7 | n.d. | n.d. | n.d. |
| LMA21 | 40.9 | n.d. | n.d. | 21.6 | n.d. | n.d. | n.d. | 85.7 | 107.6 | n.d. | 15.3 | n.d. | 26.7 | n.d. | 17.6 | n.d. | n.d. | n.d. |
These values have no units, their area in the chromatogram was normalized as a percentage of the internal standard area, which was assigned to a value of 100%. PMH=pentamethyl heptane, n.d.=not detected