title: Double-blind comparison of an oral Escherichia coli preparation and mesalazine in maintaining remission of ulcerative colitis.
abstract: BACKGROUND
  Aminosalicylates are used as standard treatment for maintaining remission in ulcerative colitis. As yet, there is no other existing alternative with proven efficacy. In light of the hypothesis that the intestinal environment may contribute to the pathophysiology of ulcerative colitis, a trial was conducted to test the effects of probiotic treatment with an oral preparation of non-pathogenic E. coli.
  
  
  METHODS
  A total of 120 patients with inactive ulcerative colitis were included in a double-blind, double-dummy study comparing mesalazine 500 mg t.d.s. to an oral preparation of viable E. coli strain Nissle (Serotype 06: K5: H1) for 12 weeks with regard to their efficacy in preventing a relapse of the disease. Study objectives were to assess the equivalence of the clinical activity index (CAI) under the two treatment modalities and to compare relapse rates, relapse-free times and global assessment.
  
  
  RESULTS
  The start and end scores of the CAI demonstrated no significant difference (P = 0.12) between the two treatment groups. Relapse rates were 11.3% under mesalazine and 16.0% under E. coli Nissle 1917 (N.S.). Life table analysis showed a relapse-free time of 103 +/- 4 days for mesalazine and 106 +/- 5 days for E. coli Nissle 1917 (N.S.). Global assessment was similar for both groups. Tolerability to the treatment was excellent and did not differ. No serious adverse events were reported.
  
  
  CONCLUSIONS
  From the results of this preliminary study, probiotic treatment appears to offer another option for maintenance therapy of ulcerative colitis. Additional support is provided for the hypothesis of a pathophysiological role for the intestinal environment in ulcerative colitis.
authors.affiliation: Evangelisches Krankenhaus Köln-Kalk, University of Cologne, Germany.
authors.forename: W
authors.initials: W
authors.lastname: Kruis
authors.forename: E
authors.initials: E
authors.lastname: Schütz
authors.forename: P
authors.initials: P
authors.lastname: Fric
authors.forename: B
authors.initials: B
authors.lastname: Fixa
authors.forename: G
authors.initials: G
authors.lastname: Judmaier
authors.forename: M
authors.initials: M
authors.lastname: Stolte
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000627:therapeutic use*; D003093:Colitis, Ulcerative / Q000517:prevention & control*; D004311:Double-Blind Method; D004926:Escherichia coli; D005260:Female; D006801:Humans; D008297:Male; D019804:Mesalamine / Q000627:therapeutic use*; D008875:Middle Aged; D019936:Probiotics / Q000627:therapeutic use*; D055502:Secondary Prevention
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D019804:Mesalamine