<prompt> In a surgical patient, the causes of non-surgical infection -a Lower RTIb Wound infectionc Clostridium difficile diarrhoead UTIabcadacdbde  <response>: Postoperative patients are at increased risk for a variety of non-surgical postoperative nosocomial infections.These are:Urinary tract infection- Most conunonLower respiratory tract infections-3rd most common 2nd MC cause being surgical site infection SSI LRTI are the leading cause of death dt nosocomial inf.Antibiotic-associated diarrhoea, caused by clostridium difficile.SinusitisMeningitis 