The surgical departments of the hospital were included in the study on a rotational basis over a period of 5 months. All patients undergoing surgery during this period were enrolled in the study.

The data collection in each department lasted 6 months (8 in the case of the use of prostheses) of which:

• 5 months of continuous survey of hospitalized patients
• 30 days of post-operative surveillance for all operations, 90 days for operations involving the use of prosthetic material Surveillance ends when a surgical site infection occurs, even if the event is prior to 30 or 90 days.

For each surgery, information was recorded such as the type of surgery, duration, ASA score, prophylaxis.

Inclusion Criteria:

• patient undergoing surgery

Exclusion Criteria:

-

hospitalized patients undergoing surgery