Parenteral Antibiotics Compared to Combination of Oral and Parenteral Antibiotics in Colorectal Surgery Prophylaxis

In both groups a second intravenous dose of cefuroxime (750mg) will be administered if the intraoperative time elongates more than three hours or there is an intraoperative bleeding over 1000cc

Both groups undergo colorectal surgery. This section does not include rectal surgery ( see Inclusion/exclusion criteria)

An oral antibiotic pattern of ciprofloxacin (750 mg / 12h, 2 doses) the day before surgery.

An oral antibiotic pattern of metronidazole (250 / 8h, 3 doses) the day before surgery.

An intravenous antibiotic pattern of cefuroxime 1.5 g during anesthetic induction.

An intravenous antibiotic pattern of metronidazole 1 g during anesthetic induction.