Interactions between low sanitary condition (LSC) and high sanitary condition (HSC) pigs and a basal dietary AA profile (AA-B) or a supplemented dietary AA profile containing 20% more Met, Thr, and Trp compared with the basal profile (AA-S), for ADFI (A), G:F (B), white blood cell (WBC) number (C), and mean cell volume (MCV; D). SC = sanitary conditions. Interactions between LSC and HSC pigs and phase (Ph) for serum haptoglobin concentration (E), serum PigMAP concentration (F), plasma granulocyte number (G), and plasma monocyte number (H). Interaction between LSC and HSC pigs and a low CP concentration diet (LP) or a normal CP concentration diet (NP) for serum haptoglobin concentration (I). The open bars represent the LSC treatment and the filled bars represent the HSC treatment. Bars represent least squares means ± SEM. P-values were considered significant when P ≤ 0.05.