Fig. 1

Caecal bacterial proportional counts (%) of probe versus diet as observed using FISH. The diets tested were LM-AX (Low meat- no added arabinoxylan; LM + AX- low meat with added AX; HM-AX- high meat no added AX; HM + AX- high meat with added AX, as described previously [22]. * indicates a significant change (P < 0.05) in the proportion of bacteria observed using the stated probe as a result of the introduction of AX to the diet, as calculated using a non-parametric Mann-Whitney test. ¹ targets 64% of the order Bacteroidales; ² targets most members of the genus Tannerella and the genus Prevotella of the class Bacteriodetes; ³ targets most of the Clostridium histolyticum group (Clostridium cluster I and II); ⁴ targets most of the Clostridium coccoides-Eubacterium rectale group (Clostridium cluster XIVa and XIVb); ⁵ targets