“…There is also an assumption that sulfate-reducing bacteria can cause some forms of cancer of the rectum through the formation of hydrogen sulfide [14,15,20], which affects the metabolism of intestinal cells and give rise to various inflammatory bowel diseases [12,13,17,21]. The species of Desulfovibrio genus cause bloody diarrhea, weight loss, anorexia, epithelial hyperplasia, abscesses and inflammatory infiltrates in animals and humans [2,3,8,14,15,19]. The increased number of sulfate-reducing bacteria was found in feces from people with ulcerative colitis compared with healthy individuals [2,3,10,17,19].…”