Single-dose antibiotic prophylaxis in contaminated abdominal surgery

Area of Science:

• Infectious Diseases
• Surgical Oncology
• Clinical Pharmacology

Background:

• Perioperative antibiotic prophylaxis is standard for contaminated abdominal surgery.
• The optimal duration of antibiotic therapy remains debated, balancing efficacy against resistance and side effects.

Purpose of the Study:

• To compare the efficacy of a single dose versus an extended course of moxalactam in preventing surgical site infections (SSIs) after contaminated abdominal surgery.

Main Methods:

• A randomized clinical trial involving 1027 patients undergoing contaminated abdominal surgery.
• Patients received either a single intravenous dose of moxalactam or an extended 48-hour course (eight doses).
• Wound infection rates and other complications were compared between the two groups.

Main Results:

• The wound infection rate was 5.4% for the single-dose group and 6.1% for the extended-course group.
• No statistically significant difference was observed in wound infection rates (95% CI) between the single-dose and extended-course regimens.
• There were no significant differences in other postoperative complications between the treatment groups.

Conclusions:

• A single dose of moxalactam is as effective as a 48-hour course in preventing SSIs after contaminated abdominal surgery.
• Shorter antibiotic durations may be sufficient, potentially reducing antibiotic-related adverse events and costs.