Competitive inhibition of adherence of enterotoxigenic Escherichia coli,enteropathogenic Escherichia coli and Clostridium difficile to intestinal epithelial cell line Lovo by purified adhesin of Bifidobacterium adolescentis 1027

AIM: To observe competitive inhibition of adherence of enterotoxigenic Escherichia coli (ETEC), enteropathogenic Escherichia coli (EPEC) and Clostridium difficile ( C. difficile) to intestinal epithelial cell line Lovo by purified adhesin of Bifidobacterium adolescentis 1027 (B. ado 1027). METHODS: The binding of bacteria to intestinal epithelial cell line Lovo was counted by adhesion assay. The inhibition of adherence of ETEC, EPEC and C. difficile to intestinal epithelial cell line Lovo by purified adhesin of B. ado 1027 was evaluated quantitatively by flow cytometry. RESULTS: The purified adhesin at the concentration of 10 IJg/mL, 20 IJg/mL and 30 IJg/mL except at 1 IJg/mL and 5 IJg/mL could inhibit significantly the adhesion of ETEC, EPEC and C. difficile to intestinal epithelial cell line Lovo. Moreover, we observed that a reduction in bacterial adhesion was occurred with increase in the concentration of adhesin, and MFI (Mean fluorescent intensity) was decreased with increase in the concentration of adhesin. CONCLUSION: The purified adhesin of B. ado 1027 can inhibit the adhesion of ETEC, EPEC and C. difficile to intestinal epithelial cell line Lovo in a dose-dependent manner.

糖尿病合并血源性感染90例临床分析

【目的】探讨糖尿病（DM）患者合并血源性感染的病原学分布和临床特征。【方法】对本院90例DM合并血源性感染患者的临床资料进行回顾性分析。【结果】DM患者合并菌血症以大肠埃希菌最为常见，其次为葡萄球菌属和肺炎克雷伯杆菌，各占比为44．4％、27．7％和15．6％，真菌的检出率为1．1％；DM 患者合并脓毒血症的致病菌依次为肺炎克雷伯菌、金葡菌、大肠埃希菌及其他，各占比为45．8％、20．8％、20．8％及12．6％。与非脓毒血症者比较，脓毒血症者的年龄大、发热时间长、糖化血红蛋白（HbA1c）高、C反应蛋白（CRP）高、血脂指标低，且两组比较有显著性差异（P＜0．01，P＜0．05）。【结论】应重视DM 合并血源性感染的特殊性，以指导临床的诊治。