This article has been retracted as it is found to contain a substantial amount of material from published papers. The three most plagiarized papers are: (1) I. Sekirov, S. L. Russell, L. C. Antunes and B. B. Finlay, “Gut microbiota in health and disease,” Physiological Reviews, vol. 90, no. 3, pp. 859–904, 2010. (2) V. M. Hubbard and K. Cadwell, “Viruses, autophagy genes, and Crohn’s disease,” Viruses, vol. 3, no. 7, pp. 1281–1311, 2011. (3) B. Khor, A. Gardet and R. J. Xavier, “Genetics and pathogenesis of inflammatory bowel disease,” Nature, vol. 474, no. 7351, pp. 307–317, 2011 [1].