Age

18–any

Sex

ALL

Healthy volunteers

Not accepted

Adult ≥ 18 years old
With histologically confirmed rectal or left colon adenocarcinoma by biopsy material from colonoscopy
Having elective colorectal surgery after standardized bowel preparation
Affiliated to a social security system
Signature of informed consent

Major surgery 30 days before scheduled colorectal surgery
Administration of systemic antibiotic therapy within 30 days prior to planned colorectal surgery
Presenting a contraindication to elective colorectal surgery
Patient protected by law
Pregnant or breastfeeding woman

Human Intestinal Microbiome and Surgical Outcomes in Patients Undergoing Colorectal Cancer Surgery