After 4 and 10 days post-challenge, pigs were euthanized and the
ileum and caecum content were aseptically sampled to (a) quantify lactic, formic, and
short-chain fatty acids (SCFA), (b) quantify bacterial populations and Salmonella by
fluorescence in situ hybridization and (c) qualitatively analyse bacterial populations
through denaturing gradient gel electrophoresis (DGGE).