The most common hospital-acquired (nosocomial) infection is -
The most common hospital-acquired infection is urinary tract infection (UTI), which accounts for almost 40% of all nosocomial infections . Most hospital-acquired UTIs are associated with urinary catheters, a commonly used device among hospitalized patients. Ref Davidson 23rd edition pg 630
Urinary tract infection
Pneumonia
Surgical wound infection
Bacteremia
Miscellaneous