Rotavirus infection significantly impaired the structure and integrity of jejunum at manifestation and convalescent stages, as shown by the significant decreases in villus height (p < 0.0001) and V:C ratio (p < 0.0001) (Figures 1D,E), and the increase in crypt depth (p = 0.032) and serum DAO (p = 0.042) levels (Figures 1G,H). The gene discussed is DAO; the disease is Rotavirus infection.