April 2019: We have reviewed the evidence and made new recommendations on nasal decolonisation, preoperative antiseptic skin preparation, antiseptics and antimicrobials before wound closure, and methods of wound closure to prevent surgical site infections in people having surgery. These recommendations are marked .
Recommendations marked  last had an evidence review in 2008. In some cases, minor changes have been made to the wording to bring the language and style up to date, without changing the meaning.
Minor changes since publication
June 2019: Hydrex Surgical Scrub was added to footnote 2 of table 1.