Background:Surgical wound infection continues to consume a considerable portion of health care finance. Even though the complete elimination of wound infections is not possible, a reduction of observed wound infection rate to a minimum level could have marked benefits in terms of both patients comfort and resources used .As many surgeons believe that routine culture of peritoneal fluid in patients of secondary peritonitis offer no useful information & no clinical benefits, not too many studies had been done to support the utility of peritoneal fluid culture as a important parameter in preventing SSI.. This study was aimed to study relevance of peritoneal fluid culture in relation to its impact on surgical site infections and to know the most common organism associated with peritonitis & SSI with their antibiotic sensitivity in our hospital. Also to know if any correlation present between organism isolated from peritoneal fluid & organism isolated from pus from wound.