CHICAGO (AP) -- Preventing infections from surgery is a major concern for hospitals and it turns out some simple measures can make a big difference.

A project at seven big hospitals reduced infections after colorectal surgeries by nearly one-third. It prevented an estimated 135 infections, saving almost $4 million.

The measures included having patients shower with special germ-fighting soap before surgery, and having surgery teams change gowns, gloves and instruments during operations to prevent spreading germs picked up during the procedures.

Practices were standardized at the seven hospitals.

The Joint Commission hospital regulating group and the American College of Surgeons directed the project. They announced results on Wednesday.

Copyright 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.