Specifically, the genes associated with flagellar basal body (flgB, flgF, flgH, and flgI), rod cap (flgJ), hook (flgE), hook–filament junction (flgK and flgL), and type III secretion system (fliR, fliP, fliI, and fliH) were found to be significantly up-regulated in strain GDH11385 during host infection. The gene discussed is FLII; the disease is infection.