AIM:To detect the levels of Fusobacterium nucleatum in Uygurs of Xinjiang with normal glucose tolerance (NGT) or type 2 diabetes mellitus (T2DM) and to analyze the correlation between Fusobacterium nucleatum level and type 2 diabetes mellitus.METHODS:Blood and fecal samples were collected from Uygurs of Xinjiang with NGT or T2DM respectively.16SrDNA quantitative real-time PCR technology was used to detect the levels of Fusobacterium nucleatum in fecal samples.The correlations between Fusobacterium nucleatum and BMI,TC,TG,HDL and LDL levels were analyzed by Pearson.RESULTS:(1) The levels of Fusobacterium nucleatum in Uygurs T2DM group were significantly higher than those in Uygurs NGT group (P =0.011).(2) Fusobacterium nucleatum was positively correlated with the levels of BMI (r =0.335,P =0.049),TC(r =0.472,P =0.011)and LDL(r =0.368,P =0.029).CONCLUSION:The levels of Fusobacterium nucleatum may be closely related to lipid metabolism of T2DM in Uygurs.