Effects of housing hygiene conditions on amino acid postprandial profiles in pigs selected for low and high residual feed intake

Health challenge may affect the metabolism of nutrients. This study was performed to evaluate the effects of a systemic inflammation induced by poor housing conditions on postprandial profiles of plasma amino acids in pigs divergently selected for residual feed intake (RFI). The trial was based on a 2×2 factorial design (n=6/group) including low-RFI (LRFI) and high-RFI (HRFI) pigs housed in two hygiene conditions (Clean vs Dirty). After a 6-week challenge period, an intravenous catheter was inserted and blood samples were collected during a 4-hour period to measure plasma amino acid concentrations. Interaction between Line × Hygiene was significant (P