Average area under the curve for plasma amino acid concentrations (µMxmin) calculated during the 4 hours of blood sampling following the meal test (basal values are included) in control (C) and co-infected (MH1N1) pigs fed <i>ad libitum</i> (AL) or feed restricted (FR).

<p>Values are least square means. n = number of pigs. SEM = standard error of the mean; I = Infection; FR = Feed restriction; ns = not significant (P>0.05).</p>a,b<p>: values with different letters are significantly different with P<0.05; ns = not significant: P>0.05 for I×FR and P>0.1 for I and FR.