Fig. 2.

Kinetics of virus-specific IgA antibody responses in duodenum (a), jejunum (b), and ileum (c) segment cultures as determined by an antibody-capture ELISA in Experiment 1. Turkey poults were orally infected with TCV at 10 days old. Intestinal segments of duodenum, jejunum, and ileum were separately collected from turkeys of infected or uninfected control groups at 1, 2, 3, and 4 weeks PI and cultured. The virus-specific IgA antibodies in the culture supernatants were assessed by ELISA. The error bars represent the standard error of five samples. OD 450=optical density read at 450 nm. The significance of difference between infected and uninfected control groups is indicated at each time interval by asterisks (^∗p<0.1; ^∗∗p<0.05).