Intra-abdominal infections (IAIs) include a lot of pathological conditions occurring in the abdomen ranging from uncomplicated appendicitis to faecal peritonitis and represent a daily challenge worldwide. Every physician during his professional life will treat a case of IAIs. Despite of this the treatment of IAIs is still controversial and often involve only one professional figure. WSES (World Society of Emergency Surgery) try to uniform the treatment of IAIs through the publication of the WSES Guidelines. The WSES board involves general surgeons, critical care surgeons, internists,...