<prompt> Most common Nosocomial infection ?PneumoniaUTISurgical wound infectionNephritis  <response>: Ans. is b i.e., UTI Most common nosocomial infection - 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. 