Table 3

Bacterial community cellular fatty acid (CFA) composition in the faeces of the different age groups

CFAChildrenAdultsElderlyCDAD
Saturated straight chain
 14:04.4 (1.1)4.1 (1.8)3.0 (0.9)2.1 (0.8)
 15:01.7 (0.5)* 3.0 (0.8) 1.6 (0.4) 0.2 (0.2)*
 16:043.9 (2.9)* 24.8 (3.3)* 37.0 (3.8) 30.3 (5.6)
 17:01.4 (0.6)3.4 (1.9)1.1 (0.7)1.0 (0.8)
 18:024.1 (2.3)* 15.3 (3.5)* 21.9 (1.7)16.9 (2.7)
 20:02.9 (1.1)* 2.7 (1.6) 3.0 (1.0) 9.6 (3.2)*
 Total79.3 (3.3)* 58.3 (7.5)* 68.4 (5.7)60.3 (7.4)
Unsaturated straight chain
 16:1 cis90.0 (0.0)* 1.1 (0.4)* 0.4 (0.1) 1.1 (0.3)
 18:1cis96.9 (1.8)* 8.2 (2.3)6.6 (2.0)15.5 (4.2)*
 18:1 cis113.9 (1.0)6.7 (3.5)5.6 (1.3)4.9 (2.1)
 18:2cis9, 123.5 (0.9)8.2 (5.0)4.7 (2.7)7.9 (2.8)
 20:1 cis110.2 (0.2)* 0.2 (0.2) 0.2 (0.2) 2.9 (1.3)*
 Total14.6 (2.5)* 24.5 (10.7)17.5 (4.6)32.4 (6.4)*
Branched chain
 14:0 iso0.0 (0.0)* 0.2 (0.1)* 0.0 (0.0)0.0 (0.0)
 15:0 anteiso2.2 (1.0)* 2.1 (0.5) 1.1 (0.3) 0.0 (0.0)*
 15:0 iso0.4 (0.2)* 0.9 (0.2)* § 0.7 (0.2) 0.0 (0.0) §
 16:0 iso0.3 (0.2)0.5 (0.3)0.4 (0.3)0.0 (0.0)
 17:0 anteiso0.4 (0.3)1.1 (0.7)0.3 (0.2)0.1 (0.1)
 17:0 iso0.2 (0.2)0.5 (0.3)0.4 (0.2)0.1 (0.1)
 Total3.3 (1.2)* 4.8 (1.1) 2.5 (0.7) 0.1 (0.4)*
Dimethyl acyl (DMA)
 14:0 DMA0.0 (0.0)* 0.6 (0.2)* 0.3 (0.1) 0.1 (0.1)
 15:0 anteiso DMA0.0 (0.0)* 0.5 (0.1)* 0.0 (0.0) 0.0 (0.0)
 16:0 DMA1.0 (0.3)2.4 (0.6)2.0 (0.4)1.4 (0.3)
 18:0 DMA0.0 (0.0)* 1.1 (0.3)* 0.8 (0.3) 1.7 (0.6)
 18:1cis9 DMA1.3 (0.3)1.9 (1.0)1.2 (0.5)0.5 (0.3)
 18:1 cis11 DMA0.0 (0.0)* 1.1 (0.3)* 0.5 (0.1) § 0.1 (0.1) §
 19cyc9,10 DMA0.0 (0.0)0.0 (0.0)0.0 (0.0)0.0 (0.0)
 Total2.3 (0.5)7.5 (1.9)4.8 (0.6)3.8 (0.3)
  • Results are expressed as mean (SEM) percent in children (n=10), adults (n=7), elderly (n=5), and in elderly patients withClostridium difficile associated diarrhoea (CDAD, n=4).

  • Corresponding symbols in the same row indicate means are significantly different (p⩽0.05).