Reducing Surgical Site Infections in Rectal Cancer Surgery Through Oral Antibiotics

Strategic Insights -

Researchers at Dandenong Hospital, Victoria, Australia, have conducted a systematic review and meta-analysis to investigate the effectiveness of adding oral antibiotics (oAB) to mechanical bowel preparation (MBP) in reducing surgical site infections (SSI) and anastomotic leaks (AL) in elective colorectal cancer surgery. The study, published in Colorectal Disease, found that the addition of oAB significantly reduced the risk of SSI by 45% in patients undergoing colorectal cancer resection. This benefit was consistent in rectal cancer-specific cohorts, supporting the integration of oral antibiotics into standard bowel preparation protocols.

Key Takeaways:

  • The addition of oral antibiotics (oAB) to mechanical bowel preparation (MBP) significantly reduced the risk of surgical site infections (SSI) by 45% in patients undergoing colorectal cancer resection.
  • Nine trials comprising 3046 patients with colorectal cancer met inclusion criteria for the systematic review and meta-analysis.
  • The primary outcomes of the study were overall SSI, with secondary outcomes including CDC-defined SSI subtypes, anastomotic leak (AL), and Clostridium difficile infection.
  • The risk of bias was assessed using the RoB 2.0 tool, and the certainty of evidence was evaluated with GRADE methodology.
  • The study found that the benefits of oAB were consistent in rectal cancer-specific cohorts, supporting the integration of oral antibiotics into standard bowel preparation protocols for patients undergoing colorectal cancer resection.
  • Authors of the study include Raelene Tan, Rathin Gosavi, William Teoh, Raymond Yap, Paul McMurrick, Geraldine Ooi, and Vignesh Narasimhan from Dandenong Hospital and other institutions.

Statistics:

  • 45% reduction in risk of SSI in patients undergoing colorectal cancer resection compared to mechanical bowel preparation alone.
  • 3046 patients with colorectal cancer were included in the systematic review and meta-analysis.
  • 9 trials met inclusion criteria for the study.
  • 95% confidence interval for the risk ratio of SSI was 0.44-0.68.

Sources:

  • Tan, R., Gosavi, R., Teoh, W., Yap, R., McMurrick, P., Ooi, G., ... & Narasimhan, V. (2025). Mechanical bowel preparation plus oral antibiotics reduces surgical site infection and anastomotic leak rates in elective colorectal cancer surgery: A systematic review and meta-analysis of randomised controlled trials. Colorectal Disease, 27(10), p 365.
  • Dandenong Hospital, Melbourne, Victoria, Australia.
  • Wiley, 111 River St, Hoboken 07030-5774, NJ, USA. (Wiley-Blackwell - www.wiley.com/; Colorectal Disease - onlinelibrary.wiley.com/journal/10.1111/(ISSN)1463-1318)