Colonic carriage of Streptococcus bovis and colorectal neoplasia: A prospective 17-year longitudinal case-control study

Doron Boltin, Elad Goldberg, Olga Bugaevsky, Elena Kelner, Shlomo Birkenfeld, Rachel Gingold-Belfer, Nathan Keller, Yaron Niv, Ram Dickman

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Background Patients with Streptococcus bovis infective endocarditis have an increased prevalence of advanced colonic neoplasia; however, an association with fecal carriage of the organism is unclear. S. bovis has been shown to promote colonic neoplasia in preclinical studies. The aim of this study was to examine the effect of S. bovis fecal carriage on the long-term risk of colonic neoplasia. Patients and methods Patients were prospectively recruited before colonoscopy. S. bovis was detected by culture in stool, colonic fluid aspirates, and biopsies. Patients continued colonoscopic surveillance at intervals according to accepted guidelines. The National Cancer Registry was checked for diagnoses of colorectal cancer on 31 December 2014. Results A total of 118 patients were recruited [75 (72.8%) men, aged 64.5 ± 9.3 years] including 15 with S. bovis. The mean duration of follow-up was 190.7 ± 123.5 months. Colonic neoplasia was detected at colonoscopy in six (40.0%) and 49 (47%) patients with and without S. bovis, respectively (P=0.78). At the end of follow-up, colorectal cancer had developed in one (6.7%) S. bovis-positive and six (5.8%) S. bovis-negative patients (P= 1.00). Conclusion Fecal carriage of S. bovis at baseline is not associated with an increased long-term risk of developing colonic neoplasia in this longitudinal study.

Original languageEnglish
Pages (from-to)1449-1453
Number of pages5
JournalEuropean Journal of Gastroenterology and Hepatology
Issue number12
StatePublished - Dec 2015
Externally publishedYes

Bibliographical note

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© 2015 Wolters Kluwer Health, Inc. All rights reserved.


  • Cancer risk
  • Streptococcus bovis
  • colonic neoplasia
  • colorectal cancer
  • feces


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