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Abstract

Background and aim: Ulcerative colitis (UC) is a chronic inflammatory bowel disease. The probiotic bacterium Escherichia coli Nissle 1917 (EcN) has been used to maintain and induce clinical remission in UC. Our aim was to test the effect of Ciprofloxacin and/or orally administered EcN as add-on to conventional therapies in patients with active UC. Patients and methods: Our single center double-blinded randomized placebo controlled study included patients with a Colitis Activity Index (CAI) score of at least 6. Patients were randomized to Ciprofloxacin or placebo for 1. week followed by EcN or placebo for 7. weeks. All 4 treatments were given as add-on treatments. Results: One hundred subjects with active UC were recruited. In the per-protocol analysis we, surprisingly, found that in the group receiving placebo/EcN fewer patients, 54%, reached remission compared to the group receiving placebo/placebo, 89%, p. <. 0.05. Among patients treated with Cipro/placebo and Cipro/EcN, 78% and 66% reached remission, respectively. Furthermore, the group receiving placebo/EcN had the largest number of withdrawals, 11 of 25 (44%), compared to 15 of 75 (20%) in any of the other groups, p. <. 0.05. Indication of lack of mucosal healing was found in the group treated with placebo/Nissle, since only 4 (29%) of the 14 patients, who completed the study, reported no blood in stools at week 12 (p. <. 0.02), compared to 63%, 67% and 65% in groups treated with Cipro/Nissle, Cipro/placebo and placebo/placebo, respectively. Conclusions: Our data suggest that there is no benefit in the use of E. coli Nissle as an add-on treatment to conventional therapies for active ulcerative colitis. Furthermore, treatment with E. coli Nissle without a previous antibiotic cure resulted in fewer patients reaching clinical remission.

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A.M., P., H., M., S.I., H., E.M., M., I., N.-L., & K.A., K. (2014). Ciprofloxacin and probiotic Escherichia coli Nissle add-on treatment in active ulcerative colitis: A double-blind randomized placebo controlled clinical trial. Journal of Crohn’s and Colitis, 8(11), 1498–1505. Retrieved from http://www.embase.com/search/results?subaction=viewrecord&from=export&id=L53204807%5Cnhttp://dx.doi.org/10.1016/j.crohns.2014.06.001

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