Fig. 1. Suckling piglets had lower NK cell activity (% lysis of K562 cells) compared to weaned piglets in blood and ileal mononuclear cells at PID 1 (A and B) and PID 5 (C and
D). Blood and ileal mononuclear cells were co-cultured with CFSE stained K562 cells at indicated ratios overnight. The dead cells were stained by incubating with 7-AAD.
The cells were observed by flow cytometry to obtain % of dead K562 cells. The groups that were compared were, suckling uninfected versus weaned uninfected, suckling
infected versus weaned infected, suckling infected versus suckling uninfected and weaned infected versus weaned uninfected within a time point. The bar graphs labeled
with different alphabetical letters are significantly different (P < 0.01).