<prompt> Which of the following causes highest risk of nosocomial infection to a patient aEURPatient admitted for elective surgeryHIV patient coming in follow up OPDPatient undergoing endoscopyPatient admitted for normal delivery  <response>: Patient admitted for elective surgery Ref: Most common nosocomial infection -4 Urinary tract infection. - Most of the nosocomial UTIs occur after urinary catheterization. Second most common nosocomial infection -- Pneumonia. - Most of the nosocomial pneumonias are acquire through respiratory intubation, mechanical ventilation and suction of the material from mouth. Next most common cause of nosocomial infection Surgical procedures. - Surgical procedures increases a patients risk of getting an infection in the hospital. Surgery directly invades the patients body giving bacteria a way into normally sterile pas of the body. - An infection may be acquired from contaminated surgical equipment or from health-care workers. Following surgery, the surgical wound can become infected. Other hospital procedures that put patients at risk for nosocomial infection are : ? - Gastrointestinal procedures endoscopy - Obstetric procedures - Kidney dialysis 