The objective of the study is to investigate whether peri-operative symbiotic treatment could reduce the risk of postoperative infections in patients undergoing elective colorectal surgery. This study was also designed to assess the risk-adjusted incidence and predictors of surgical site infections.

Inclusion Criteria:

1. Both genders
2. More than 14 years old
3. Candidate for elective colorectal surgery

Exclusion Criteria:

1. Denied written informed consent,
2. Severe neutropenia, and
3. Critically ill condition
4. Not meeting inclusion criteria