Why is antibacterial soap used to scrub the chest prior to surgery?

Antibacterial soap is used to scrub the chest prior to surgery to reduce the risk of surgical site infections by minimizing the presence of bacteria on the skin. This preoperative cleansing helps to ensure a sterile environment, which is crucial for successful surgical outcomes. By decreasing the microbial load, the likelihood of postoperative complications is significantly lowered, promoting better healing and recovery.