FA responses differed significantly from those for the other two groups (P < 0.01).
CONCLUSION:Despite the small number of cases studied, the higher reactivity to FAs in GroupⅠcompared to Groups Ⅱ and Ⅲ adds new information, and suggests the presence of a possible alteration in intestinal epithelial function.
INTRODUCTIONIrritable bowel syndrome (IBS) is an extremely common disorder that affects about one in every 5-10 persons. Estimates of prevalence range from 9% to 22% depending upon population group studied [1][2][3][4][5][6][7] . The exact pathophysiology of IBS remains unknown, although various mechanisms including gastrointestinal dismotility and visceral hypersensitivity have been well studied in IBS [8][9][10] . Recent interest has also been directed to the possible participation of the mucosa in the pathophysiology of IBS [11][12][13] . Inflammatory mediators cause intestinal dysfunction and a consequent increase in permeability [14][15][16][17] . However the role and interaction of inflammatory mediators with IBS remains to be determined [17] . IBS is defined by symptomatic criteria rather than biological markers.